diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a5237d2..9dd8350 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,6 +13,33 @@ on:
       - 'stl-preview-base/**'
 
 jobs:
+  build:
+    timeout-minutes: 10
+    name: build
+    permissions:
+      contents: read
+      id-token: write
+    runs-on: ${{ github.repository == 'stainless-sdks/imagekit-go' && 'depot-ubuntu-24.04' || 'ubuntu-latest' }}
+    if: |-
+      github.repository == 'stainless-sdks/imagekit-go' &&
+      (github.event_name == 'push' || github.event.pull_request.head.repo.fork)
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Get GitHub OIDC Token
+        if: github.repository == 'stainless-sdks/imagekit-go'
+        id: github-oidc
+        uses: actions/github-script@v8
+        with:
+          script: core.setOutput('github_token', await core.getIDToken());
+
+      - name: Upload tarball
+        if: github.repository == 'stainless-sdks/imagekit-go'
+        env:
+          URL: https://pkg.stainless.com/s
+          AUTH: ${{ steps.github-oidc.outputs.github_token }}
+          SHA: ${{ github.sha }}
+        run: ./scripts/utils/upload-artifact.sh
   lint:
     timeout-minutes: 10
     name: lint
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index bfc26f9..75ec52f 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "2.2.0"
+  ".": "2.3.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 94357b3..e9bf578 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 48
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/imagekit-inc%2Fimagekit-13fc3d7cafdea492f62eef7c1d63424d6d9d8adbff74b9f6ca6fd3fc12a36840.yml
-openapi_spec_hash: a1fe6fa48207791657a1ea2d60a6dfcc
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/imagekit-inc%2Fimagekit-e5b5a158784fff63311ceef956e8d5ce9e87c6b557d23ab737270040eb39adcd.yml
+openapi_spec_hash: b0293985a8806f367319af573d1b418c
 config_hash: 47cb702ee2cb52c58d803ae39ade9b44
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6a9b04c..211cebc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,30 @@
 # Changelog
 
+## 2.3.0 (2026-02-28)
+
+Full Changelog: [v2.2.0...v2.3.0](https://github.com/imagekit-developer/imagekit-go/compare/v2.2.0...v2.3.0)
+
+### Features
+
+* **api:** dpr type update ([7b5ed76](https://github.com/imagekit-developer/imagekit-go/commit/7b5ed7649a30f369e05741ad26e87866ab369341))
+
+
+### Bug Fixes
+
+* allow canceling a request while it is waiting to retry ([c772a06](https://github.com/imagekit-developer/imagekit-go/commit/c772a06aa381125614083d572ce99b73b4eb3ce5))
+* **encoder:** correctly serialize NullStruct ([c8a223a](https://github.com/imagekit-developer/imagekit-go/commit/c8a223a358428b56cd5f13843928252c58acff90))
+
+
+### Chores
+
+* **ci:** add build step ([950faa7](https://github.com/imagekit-developer/imagekit-go/commit/950faa70ba325a3af7e2149618d1690d681888a1))
+* **internal:** codegen related update ([255a031](https://github.com/imagekit-developer/imagekit-go/commit/255a0313de39110cdedc4002d451bdc39e3bc308))
+* **internal:** codegen related update ([e1e4755](https://github.com/imagekit-developer/imagekit-go/commit/e1e47559733779920f899cb665b244e431702668))
+* **internal:** codegen related update ([5071176](https://github.com/imagekit-developer/imagekit-go/commit/50711763c0f3bee01b36ab00500db61aa371415b))
+* **internal:** move custom custom `json` tags to `api` ([4609e1f](https://github.com/imagekit-developer/imagekit-go/commit/4609e1fd02735cc92d442ab6c6360429b5a8318d))
+* **internal:** remove mock server code ([ab007f7](https://github.com/imagekit-developer/imagekit-go/commit/ab007f7fa428ff639b7c1177976d76b4c66eb5f5))
+* update mock server docs ([1ba9e87](https://github.com/imagekit-developer/imagekit-go/commit/1ba9e87f6b30e3992999808434dd39298de4d0a0))
+
 ## 2.2.0 (2026-02-02)
 
 Full Changelog: [v2.1.1...v2.2.0](https://github.com/imagekit-developer/imagekit-go/compare/v2.1.1...v2.2.0)
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 0635957..00f7743 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -46,13 +46,6 @@ $ go mod edit -replace github.com/imagekit-developer/imagekit-go=/path/to/imagek
 
 ## Running tests
 
-Most tests require you to [set up a mock server](https://github.com/stoplightio/prism) against the OpenAPI spec to run the tests.
-
-```sh
-# you will need npm installed
-$ npx prism mock path/to/your/openapi.yml
-```
-
 ```sh
 $ ./scripts/test
 ```
diff --git a/README.md b/README.md
index ffc95e0..5d319a5 100644
--- a/README.md
+++ b/README.md
@@ -59,7 +59,7 @@ Or to pin the version:
 <!-- x-release-please-start-version -->
 
 ```sh
-go get -u 'github.com/imagekit-developer/imagekit-go/v2@v2.2.0'
+go get -u 'github.com/imagekit-developer/imagekit-go/v2@v2.3.0'
 ```
 
 <!-- x-release-please-end -->
diff --git a/accountorigin.go b/accountorigin.go
index 52888b2..0f247bb 100644
--- a/accountorigin.go
+++ b/accountorigin.go
@@ -425,13 +425,13 @@ func init() {
 // The properties AccessKey, Bucket, Name, SecretKey, Type are required.
 type OriginRequestS3Param struct {
 	// Access key for the bucket.
-	AccessKey string `json:"accessKey,required"`
+	AccessKey string `json:"accessKey" api:"required"`
 	// S3 bucket name.
-	Bucket string `json:"bucket,required"`
+	Bucket string `json:"bucket" api:"required"`
 	// Display name of the origin.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// Secret key for the bucket.
-	SecretKey string `json:"secretKey,required"`
+	SecretKey string `json:"secretKey" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader param.Opt[string] `json:"baseUrlForCanonicalHeader,omitzero" format:"uri"`
 	// Whether to send a Canonical header.
@@ -439,7 +439,7 @@ type OriginRequestS3Param struct {
 	// Path prefix inside the bucket.
 	Prefix param.Opt[string] `json:"prefix,omitzero"`
 	// This field can be elided, and will marshal its zero value as "S3".
-	Type constant.S3 `json:"type,required"`
+	Type constant.S3 `json:"type" api:"required"`
 	paramObj
 }
 
@@ -454,15 +454,15 @@ func (r *OriginRequestS3Param) UnmarshalJSON(data []byte) error {
 // The properties AccessKey, Bucket, Endpoint, Name, SecretKey, Type are required.
 type OriginRequestS3CompatibleParam struct {
 	// Access key for the bucket.
-	AccessKey string `json:"accessKey,required"`
+	AccessKey string `json:"accessKey" api:"required"`
 	// S3 bucket name.
-	Bucket string `json:"bucket,required"`
+	Bucket string `json:"bucket" api:"required"`
 	// Custom S3-compatible endpoint.
-	Endpoint string `json:"endpoint,required" format:"uri"`
+	Endpoint string `json:"endpoint" api:"required" format:"uri"`
 	// Display name of the origin.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// Secret key for the bucket.
-	SecretKey string `json:"secretKey,required"`
+	SecretKey string `json:"secretKey" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader param.Opt[string] `json:"baseUrlForCanonicalHeader,omitzero" format:"uri"`
 	// Whether to send a Canonical header.
@@ -472,7 +472,7 @@ type OriginRequestS3CompatibleParam struct {
 	// Use path-style S3 URLs?
 	S3ForcePathStyle param.Opt[bool] `json:"s3ForcePathStyle,omitzero"`
 	// This field can be elided, and will marshal its zero value as "S3_COMPATIBLE".
-	Type constant.S3Compatible `json:"type,required"`
+	Type constant.S3Compatible `json:"type" api:"required"`
 	paramObj
 }
 
@@ -487,13 +487,13 @@ func (r *OriginRequestS3CompatibleParam) UnmarshalJSON(data []byte) error {
 // The properties AccessKey, Bucket, Name, SecretKey, Type are required.
 type OriginRequestCloudinaryBackupParam struct {
 	// Access key for the bucket.
-	AccessKey string `json:"accessKey,required"`
+	AccessKey string `json:"accessKey" api:"required"`
 	// S3 bucket name.
-	Bucket string `json:"bucket,required"`
+	Bucket string `json:"bucket" api:"required"`
 	// Display name of the origin.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// Secret key for the bucket.
-	SecretKey string `json:"secretKey,required"`
+	SecretKey string `json:"secretKey" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader param.Opt[string] `json:"baseUrlForCanonicalHeader,omitzero" format:"uri"`
 	// Whether to send a Canonical header.
@@ -502,7 +502,7 @@ type OriginRequestCloudinaryBackupParam struct {
 	Prefix param.Opt[string] `json:"prefix,omitzero"`
 	// This field can be elided, and will marshal its zero value as
 	// "CLOUDINARY_BACKUP".
-	Type constant.CloudinaryBackup `json:"type,required"`
+	Type constant.CloudinaryBackup `json:"type" api:"required"`
 	paramObj
 }
 
@@ -517,9 +517,9 @@ func (r *OriginRequestCloudinaryBackupParam) UnmarshalJSON(data []byte) error {
 // The properties BaseURL, Name, Type are required.
 type OriginRequestWebFolderParam struct {
 	// Root URL for the web folder origin.
-	BaseURL string `json:"baseUrl,required" format:"uri"`
+	BaseURL string `json:"baseUrl" api:"required" format:"uri"`
 	// Display name of the origin.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader param.Opt[string] `json:"baseUrlForCanonicalHeader,omitzero" format:"uri"`
 	// Forward the Host header to origin?
@@ -527,7 +527,7 @@ type OriginRequestWebFolderParam struct {
 	// Whether to send a Canonical header.
 	IncludeCanonicalHeader param.Opt[bool] `json:"includeCanonicalHeader,omitzero"`
 	// This field can be elided, and will marshal its zero value as "WEB_FOLDER".
-	Type constant.WebFolder `json:"type,required"`
+	Type constant.WebFolder `json:"type" api:"required"`
 	paramObj
 }
 
@@ -542,13 +542,13 @@ func (r *OriginRequestWebFolderParam) UnmarshalJSON(data []byte) error {
 // The properties Name, Type are required.
 type OriginRequestWebProxyParam struct {
 	// Display name of the origin.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader param.Opt[string] `json:"baseUrlForCanonicalHeader,omitzero" format:"uri"`
 	// Whether to send a Canonical header.
 	IncludeCanonicalHeader param.Opt[bool] `json:"includeCanonicalHeader,omitzero"`
 	// This field can be elided, and will marshal its zero value as "WEB_PROXY".
-	Type constant.WebProxy `json:"type,required"`
+	Type constant.WebProxy `json:"type" api:"required"`
 	paramObj
 }
 
@@ -562,18 +562,18 @@ func (r *OriginRequestWebProxyParam) UnmarshalJSON(data []byte) error {
 
 // The properties Bucket, ClientEmail, Name, PrivateKey, Type are required.
 type OriginRequestGcsParam struct {
-	Bucket      string `json:"bucket,required"`
-	ClientEmail string `json:"clientEmail,required" format:"email"`
+	Bucket      string `json:"bucket" api:"required"`
+	ClientEmail string `json:"clientEmail" api:"required" format:"email"`
 	// Display name of the origin.
-	Name       string `json:"name,required"`
-	PrivateKey string `json:"privateKey,required"`
+	Name       string `json:"name" api:"required"`
+	PrivateKey string `json:"privateKey" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader param.Opt[string] `json:"baseUrlForCanonicalHeader,omitzero" format:"uri"`
 	// Whether to send a Canonical header.
 	IncludeCanonicalHeader param.Opt[bool]   `json:"includeCanonicalHeader,omitzero"`
 	Prefix                 param.Opt[string] `json:"prefix,omitzero"`
 	// This field can be elided, and will marshal its zero value as "GCS".
-	Type constant.Gcs `json:"type,required"`
+	Type constant.Gcs `json:"type" api:"required"`
 	paramObj
 }
 
@@ -587,18 +587,18 @@ func (r *OriginRequestGcsParam) UnmarshalJSON(data []byte) error {
 
 // The properties AccountName, Container, Name, SasToken, Type are required.
 type OriginRequestAzureBlobParam struct {
-	AccountName string `json:"accountName,required"`
-	Container   string `json:"container,required"`
+	AccountName string `json:"accountName" api:"required"`
+	Container   string `json:"container" api:"required"`
 	// Display name of the origin.
-	Name     string `json:"name,required"`
-	SasToken string `json:"sasToken,required"`
+	Name     string `json:"name" api:"required"`
+	SasToken string `json:"sasToken" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader param.Opt[string] `json:"baseUrlForCanonicalHeader,omitzero" format:"uri"`
 	// Whether to send a Canonical header.
 	IncludeCanonicalHeader param.Opt[bool]   `json:"includeCanonicalHeader,omitzero"`
 	Prefix                 param.Opt[string] `json:"prefix,omitzero"`
 	// This field can be elided, and will marshal its zero value as "AZURE_BLOB".
-	Type constant.AzureBlob `json:"type,required"`
+	Type constant.AzureBlob `json:"type" api:"required"`
 	paramObj
 }
 
@@ -614,23 +614,23 @@ func (r *OriginRequestAzureBlobParam) UnmarshalJSON(data []byte) error {
 // are required.
 type OriginRequestAkeneoPimParam struct {
 	// Akeneo instance base URL.
-	BaseURL string `json:"baseUrl,required" format:"uri"`
+	BaseURL string `json:"baseUrl" api:"required" format:"uri"`
 	// Akeneo API client ID.
-	ClientID string `json:"clientId,required"`
+	ClientID string `json:"clientId" api:"required"`
 	// Akeneo API client secret.
-	ClientSecret string `json:"clientSecret,required"`
+	ClientSecret string `json:"clientSecret" api:"required"`
 	// Display name of the origin.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// Akeneo API password.
-	Password string `json:"password,required"`
+	Password string `json:"password" api:"required"`
 	// Akeneo API username.
-	Username string `json:"username,required"`
+	Username string `json:"username" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader param.Opt[string] `json:"baseUrlForCanonicalHeader,omitzero" format:"uri"`
 	// Whether to send a Canonical header.
 	IncludeCanonicalHeader param.Opt[bool] `json:"includeCanonicalHeader,omitzero"`
 	// This field can be elided, and will marshal its zero value as "AKENEO_PIM".
-	Type constant.AkeneoPim `json:"type,required"`
+	Type constant.AkeneoPim `json:"type" api:"required"`
 	paramObj
 }
 
@@ -794,16 +794,16 @@ func (r *OriginResponseUnion) UnmarshalJSON(data []byte) error {
 type OriginResponseS3 struct {
 	// Unique identifier for the origin. This is generated by ImageKit when you create
 	// a new origin.
-	ID string `json:"id,required"`
+	ID string `json:"id" api:"required"`
 	// S3 bucket name.
-	Bucket string `json:"bucket,required"`
+	Bucket string `json:"bucket" api:"required"`
 	// Whether to send a Canonical header.
-	IncludeCanonicalHeader bool `json:"includeCanonicalHeader,required"`
+	IncludeCanonicalHeader bool `json:"includeCanonicalHeader" api:"required"`
 	// Display name of the origin.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// Path prefix inside the bucket.
-	Prefix string      `json:"prefix,required"`
-	Type   constant.S3 `json:"type,required"`
+	Prefix string      `json:"prefix" api:"required"`
+	Type   constant.S3 `json:"type" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader string `json:"baseUrlForCanonicalHeader" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -829,20 +829,20 @@ func (r *OriginResponseS3) UnmarshalJSON(data []byte) error {
 type OriginResponseS3Compatible struct {
 	// Unique identifier for the origin. This is generated by ImageKit when you create
 	// a new origin.
-	ID string `json:"id,required"`
+	ID string `json:"id" api:"required"`
 	// S3 bucket name.
-	Bucket string `json:"bucket,required"`
+	Bucket string `json:"bucket" api:"required"`
 	// Custom S3-compatible endpoint.
-	Endpoint string `json:"endpoint,required" format:"uri"`
+	Endpoint string `json:"endpoint" api:"required" format:"uri"`
 	// Whether to send a Canonical header.
-	IncludeCanonicalHeader bool `json:"includeCanonicalHeader,required"`
+	IncludeCanonicalHeader bool `json:"includeCanonicalHeader" api:"required"`
 	// Display name of the origin.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// Path prefix inside the bucket.
-	Prefix string `json:"prefix,required"`
+	Prefix string `json:"prefix" api:"required"`
 	// Use path-style S3 URLs?
-	S3ForcePathStyle bool                  `json:"s3ForcePathStyle,required"`
-	Type             constant.S3Compatible `json:"type,required"`
+	S3ForcePathStyle bool                  `json:"s3ForcePathStyle" api:"required"`
+	Type             constant.S3Compatible `json:"type" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader string `json:"baseUrlForCanonicalHeader" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -870,16 +870,16 @@ func (r *OriginResponseS3Compatible) UnmarshalJSON(data []byte) error {
 type OriginResponseCloudinaryBackup struct {
 	// Unique identifier for the origin. This is generated by ImageKit when you create
 	// a new origin.
-	ID string `json:"id,required"`
+	ID string `json:"id" api:"required"`
 	// S3 bucket name.
-	Bucket string `json:"bucket,required"`
+	Bucket string `json:"bucket" api:"required"`
 	// Whether to send a Canonical header.
-	IncludeCanonicalHeader bool `json:"includeCanonicalHeader,required"`
+	IncludeCanonicalHeader bool `json:"includeCanonicalHeader" api:"required"`
 	// Display name of the origin.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// Path prefix inside the bucket.
-	Prefix string                    `json:"prefix,required"`
-	Type   constant.CloudinaryBackup `json:"type,required"`
+	Prefix string                    `json:"prefix" api:"required"`
+	Type   constant.CloudinaryBackup `json:"type" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader string `json:"baseUrlForCanonicalHeader" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -905,16 +905,16 @@ func (r *OriginResponseCloudinaryBackup) UnmarshalJSON(data []byte) error {
 type OriginResponseWebFolder struct {
 	// Unique identifier for the origin. This is generated by ImageKit when you create
 	// a new origin.
-	ID string `json:"id,required"`
+	ID string `json:"id" api:"required"`
 	// Root URL for the web folder origin.
-	BaseURL string `json:"baseUrl,required" format:"uri"`
+	BaseURL string `json:"baseUrl" api:"required" format:"uri"`
 	// Forward the Host header to origin?
-	ForwardHostHeaderToOrigin bool `json:"forwardHostHeaderToOrigin,required"`
+	ForwardHostHeaderToOrigin bool `json:"forwardHostHeaderToOrigin" api:"required"`
 	// Whether to send a Canonical header.
-	IncludeCanonicalHeader bool `json:"includeCanonicalHeader,required"`
+	IncludeCanonicalHeader bool `json:"includeCanonicalHeader" api:"required"`
 	// Display name of the origin.
-	Name string             `json:"name,required"`
-	Type constant.WebFolder `json:"type,required"`
+	Name string             `json:"name" api:"required"`
+	Type constant.WebFolder `json:"type" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader string `json:"baseUrlForCanonicalHeader" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -940,12 +940,12 @@ func (r *OriginResponseWebFolder) UnmarshalJSON(data []byte) error {
 type OriginResponseWebProxy struct {
 	// Unique identifier for the origin. This is generated by ImageKit when you create
 	// a new origin.
-	ID string `json:"id,required"`
+	ID string `json:"id" api:"required"`
 	// Whether to send a Canonical header.
-	IncludeCanonicalHeader bool `json:"includeCanonicalHeader,required"`
+	IncludeCanonicalHeader bool `json:"includeCanonicalHeader" api:"required"`
 	// Display name of the origin.
-	Name string            `json:"name,required"`
-	Type constant.WebProxy `json:"type,required"`
+	Name string            `json:"name" api:"required"`
+	Type constant.WebProxy `json:"type" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader string `json:"baseUrlForCanonicalHeader" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -969,15 +969,15 @@ func (r *OriginResponseWebProxy) UnmarshalJSON(data []byte) error {
 type OriginResponseGcs struct {
 	// Unique identifier for the origin. This is generated by ImageKit when you create
 	// a new origin.
-	ID          string `json:"id,required"`
-	Bucket      string `json:"bucket,required"`
-	ClientEmail string `json:"clientEmail,required" format:"email"`
+	ID          string `json:"id" api:"required"`
+	Bucket      string `json:"bucket" api:"required"`
+	ClientEmail string `json:"clientEmail" api:"required" format:"email"`
 	// Whether to send a Canonical header.
-	IncludeCanonicalHeader bool `json:"includeCanonicalHeader,required"`
+	IncludeCanonicalHeader bool `json:"includeCanonicalHeader" api:"required"`
 	// Display name of the origin.
-	Name   string       `json:"name,required"`
-	Prefix string       `json:"prefix,required"`
-	Type   constant.Gcs `json:"type,required"`
+	Name   string       `json:"name" api:"required"`
+	Prefix string       `json:"prefix" api:"required"`
+	Type   constant.Gcs `json:"type" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader string `json:"baseUrlForCanonicalHeader" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -1004,15 +1004,15 @@ func (r *OriginResponseGcs) UnmarshalJSON(data []byte) error {
 type OriginResponseAzureBlob struct {
 	// Unique identifier for the origin. This is generated by ImageKit when you create
 	// a new origin.
-	ID          string `json:"id,required"`
-	AccountName string `json:"accountName,required"`
-	Container   string `json:"container,required"`
+	ID          string `json:"id" api:"required"`
+	AccountName string `json:"accountName" api:"required"`
+	Container   string `json:"container" api:"required"`
 	// Whether to send a Canonical header.
-	IncludeCanonicalHeader bool `json:"includeCanonicalHeader,required"`
+	IncludeCanonicalHeader bool `json:"includeCanonicalHeader" api:"required"`
 	// Display name of the origin.
-	Name   string             `json:"name,required"`
-	Prefix string             `json:"prefix,required"`
-	Type   constant.AzureBlob `json:"type,required"`
+	Name   string             `json:"name" api:"required"`
+	Prefix string             `json:"prefix" api:"required"`
+	Type   constant.AzureBlob `json:"type" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader string `json:"baseUrlForCanonicalHeader" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -1039,14 +1039,14 @@ func (r *OriginResponseAzureBlob) UnmarshalJSON(data []byte) error {
 type OriginResponseAkeneoPim struct {
 	// Unique identifier for the origin. This is generated by ImageKit when you create
 	// a new origin.
-	ID string `json:"id,required"`
+	ID string `json:"id" api:"required"`
 	// Akeneo instance base URL.
-	BaseURL string `json:"baseUrl,required" format:"uri"`
+	BaseURL string `json:"baseUrl" api:"required" format:"uri"`
 	// Whether to send a Canonical header.
-	IncludeCanonicalHeader bool `json:"includeCanonicalHeader,required"`
+	IncludeCanonicalHeader bool `json:"includeCanonicalHeader" api:"required"`
 	// Display name of the origin.
-	Name string             `json:"name,required"`
-	Type constant.AkeneoPim `json:"type,required"`
+	Name string             `json:"name" api:"required"`
+	Type constant.AkeneoPim `json:"type" api:"required"`
 	// URL used in the Canonical header (if enabled).
 	BaseURLForCanonicalHeader string `json:"baseUrlForCanonicalHeader" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
diff --git a/accountorigin_test.go b/accountorigin_test.go
index 350726b..3161145 100644
--- a/accountorigin_test.go
+++ b/accountorigin_test.go
@@ -14,7 +14,7 @@ import (
 )
 
 func TestAccountOriginNewWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -50,7 +50,7 @@ func TestAccountOriginNewWithOptionalParams(t *testing.T) {
 }
 
 func TestAccountOriginUpdateWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -90,7 +90,7 @@ func TestAccountOriginUpdateWithOptionalParams(t *testing.T) {
 }
 
 func TestAccountOriginList(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -114,7 +114,7 @@ func TestAccountOriginList(t *testing.T) {
 }
 
 func TestAccountOriginDelete(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -138,7 +138,7 @@ func TestAccountOriginDelete(t *testing.T) {
 }
 
 func TestAccountOriginGet(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/accounturlendpoint.go b/accounturlendpoint.go
index dbd0224..15465b6 100644
--- a/accounturlendpoint.go
+++ b/accounturlendpoint.go
@@ -103,7 +103,7 @@ func (r *AccountURLEndpointService) Get(ctx context.Context, id string, opts ...
 // The property Description is required.
 type URLEndpointRequestParam struct {
 	// Description of the URL endpoint.
-	Description string `json:"description,required"`
+	Description string `json:"description" api:"required"`
 	// Path segment appended to your base URL to form the endpoint (letters, digits,
 	// and hyphens only — or empty for the default endpoint).
 	URLPrefix param.Opt[string] `json:"urlPrefix,omitzero"`
@@ -186,7 +186,7 @@ type URLEndpointRequestURLRewriterCloudinaryParam struct {
 	// Whether to preserve `<asset_type>/<delivery_type>` in the rewritten URL.
 	PreserveAssetDeliveryTypes param.Opt[bool] `json:"preserveAssetDeliveryTypes,omitzero"`
 	// This field can be elided, and will marshal its zero value as "CLOUDINARY".
-	Type constant.Cloudinary `json:"type,required"`
+	Type constant.Cloudinary `json:"type" api:"required"`
 	paramObj
 }
 
@@ -207,7 +207,7 @@ func NewURLEndpointRequestURLRewriterImgixParam() URLEndpointRequestURLRewriterI
 // This struct has a constant value, construct it with
 // [NewURLEndpointRequestURLRewriterImgixParam].
 type URLEndpointRequestURLRewriterImgixParam struct {
-	Type constant.Imgix `json:"type,required"`
+	Type constant.Imgix `json:"type" api:"required"`
 	paramObj
 }
 
@@ -228,7 +228,7 @@ func NewURLEndpointRequestURLRewriterAkamaiParam() URLEndpointRequestURLRewriter
 // This struct has a constant value, construct it with
 // [NewURLEndpointRequestURLRewriterAkamaiParam].
 type URLEndpointRequestURLRewriterAkamaiParam struct {
-	Type constant.Akamai `json:"type,required"`
+	Type constant.Akamai `json:"type" api:"required"`
 	paramObj
 }
 
@@ -245,16 +245,16 @@ type URLEndpointResponse struct {
 	// Unique identifier for the URL-endpoint. This is generated by ImageKit when you
 	// create a new URL-endpoint. For the default URL-endpoint, this is always
 	// `default`.
-	ID string `json:"id,required"`
+	ID string `json:"id" api:"required"`
 	// Description of the URL endpoint.
-	Description string `json:"description,required"`
+	Description string `json:"description" api:"required"`
 	// Ordered list of origin IDs to try when the file isn’t in the Media Library;
 	// ImageKit checks them in the sequence provided. Origin must be created before it
 	// can be used in a URL endpoint.
-	Origins []string `json:"origins,required"`
+	Origins []string `json:"origins" api:"required"`
 	// Path segment appended to your base URL to form the endpoint (letters, digits,
 	// and hyphens only — or empty for the default endpoint).
-	URLPrefix string `json:"urlPrefix,required"`
+	URLPrefix string `json:"urlPrefix" api:"required"`
 	// Configuration for third-party URL rewriting.
 	URLRewriter URLEndpointResponseURLRewriterUnion `json:"urlRewriter"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -351,8 +351,8 @@ func (r *URLEndpointResponseURLRewriterUnion) UnmarshalJSON(data []byte) error {
 
 type URLEndpointResponseURLRewriterCloudinary struct {
 	// Whether to preserve `<asset_type>/<delivery_type>` in the rewritten URL.
-	PreserveAssetDeliveryTypes bool                `json:"preserveAssetDeliveryTypes,required"`
-	Type                       constant.Cloudinary `json:"type,required"`
+	PreserveAssetDeliveryTypes bool                `json:"preserveAssetDeliveryTypes" api:"required"`
+	Type                       constant.Cloudinary `json:"type" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		PreserveAssetDeliveryTypes respjson.Field
@@ -369,7 +369,7 @@ func (r *URLEndpointResponseURLRewriterCloudinary) UnmarshalJSON(data []byte) er
 }
 
 type URLEndpointResponseURLRewriterImgix struct {
-	Type constant.Imgix `json:"type,required"`
+	Type constant.Imgix `json:"type" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Type        respjson.Field
@@ -385,7 +385,7 @@ func (r *URLEndpointResponseURLRewriterImgix) UnmarshalJSON(data []byte) error {
 }
 
 type URLEndpointResponseURLRewriterAkamai struct {
-	Type constant.Akamai `json:"type,required"`
+	Type constant.Akamai `json:"type" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Type        respjson.Field
diff --git a/accounturlendpoint_test.go b/accounturlendpoint_test.go
index 06c9c66..716ef33 100644
--- a/accounturlendpoint_test.go
+++ b/accounturlendpoint_test.go
@@ -14,7 +14,7 @@ import (
 )
 
 func TestAccountURLEndpointNewWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -49,7 +49,7 @@ func TestAccountURLEndpointNewWithOptionalParams(t *testing.T) {
 }
 
 func TestAccountURLEndpointUpdateWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -88,7 +88,7 @@ func TestAccountURLEndpointUpdateWithOptionalParams(t *testing.T) {
 }
 
 func TestAccountURLEndpointList(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -112,7 +112,7 @@ func TestAccountURLEndpointList(t *testing.T) {
 }
 
 func TestAccountURLEndpointDelete(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -136,7 +136,7 @@ func TestAccountURLEndpointDelete(t *testing.T) {
 }
 
 func TestAccountURLEndpointGet(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/accountusage.go b/accountusage.go
index dadef4a..52bd8ae 100644
--- a/accountusage.go
+++ b/accountusage.go
@@ -78,10 +78,10 @@ func (r *AccountUsageGetResponse) UnmarshalJSON(data []byte) error {
 type AccountUsageGetParams struct {
 	// Specify a `endDate` in `YYYY-MM-DD` format. It should be after the `startDate`.
 	// The difference between `startDate` and `endDate` should be less than 90 days.
-	EndDate time.Time `query:"endDate,required" format:"date" json:"-"`
+	EndDate time.Time `query:"endDate" api:"required" format:"date" json:"-"`
 	// Specify a `startDate` in `YYYY-MM-DD` format. It should be before the `endDate`.
 	// The difference between `startDate` and `endDate` should be less than 90 days.
-	StartDate time.Time `query:"startDate,required" format:"date" json:"-"`
+	StartDate time.Time `query:"startDate" api:"required" format:"date" json:"-"`
 	paramObj
 }
 
diff --git a/accountusage_test.go b/accountusage_test.go
index a206f36..dcfd282 100644
--- a/accountusage_test.go
+++ b/accountusage_test.go
@@ -15,7 +15,7 @@ import (
 )
 
 func TestAccountUsageGet(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/aliases.go b/aliases.go
index a960812..cdbebd0 100644
--- a/aliases.go
+++ b/aliases.go
@@ -736,6 +736,16 @@ const TransformationCropModeExtract = shared.TransformationCropModeExtract
 // Equals "pad_extract"
 const TransformationCropModePadExtract = shared.TransformationCropModePadExtract
 
+// Accepts values between 0.1 and 5, or `auto` for automatic device pixel ratio
+// (DPR) calculation. Also accepts arithmetic expressions.
+//
+//   - Learn about
+//     [Arithmetic expressions](https://imagekit.io/docs/arithmetic-expressions-in-transformations).
+//   - See [DPR](https://imagekit.io/docs/image-resize-and-crop#dpr---dpr).
+//
+// This is an alias to an internal type.
+type TransformationDprUnionParam = shared.TransformationDprUnionParam
+
 // Specifies the duration (in seconds) for trimming videos, e.g., `5` or `10.5`.
 // Typically used with startOffset to indicate the length from the start offset.
 // Arithmetic expressions are supported. See
diff --git a/asset_test.go b/asset_test.go
index d479ff3..f1fd203 100644
--- a/asset_test.go
+++ b/asset_test.go
@@ -14,7 +14,7 @@ import (
 )
 
 func TestAssetListWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/betav2file.go b/betav2file.go
index 5417572..8874117 100644
--- a/betav2file.go
+++ b/betav2file.go
@@ -53,10 +53,11 @@ func NewBetaV2FileService(opts ...option.RequestOption) (r BetaV2FileService) {
 // about how to implement secure client-side file upload.
 //
 // **File size limit** \
-// On the free plan, the maximum upload file sizes are 20MB for images, audio, and raw
-// files, and 100MB for videos. On the paid plan, these limits increase to 40MB for
-// images, audio, and raw files, and 2GB for videos. These limits can be further increased
-// with higher-tier plans.
+// On the free plan, the maximum upload file sizes are 25MB for images, audio, and raw
+// files, and 100MB for videos. On the Lite paid plan, these limits increase to 40MB
+// for images, audio, and raw files and 300MB for videos, whereas on the Pro paid plan,
+// these limits increase to 50MB for images, audio, and raw files and 2GB for videos.
+// These limits can be further increased with enterprise plans.
 //
 // **Version limit** \
 // A file can have a maximum of 100 versions.
@@ -80,7 +81,7 @@ func (r *BetaV2FileService) Upload(ctx context.Context, body BetaV2FileUploadPar
 // Object containing details of a successful upload.
 type BetaV2FileUploadResponse struct {
 	// An array of tags assigned to the uploaded file by auto tagging.
-	AITags []BetaV2FileUploadResponseAITag `json:"AITags,nullable"`
+	AITags []BetaV2FileUploadResponseAITag `json:"AITags" api:"nullable"`
 	// The audio codec used in the video (only for video).
 	AudioCodec string `json:"audioCodec"`
 	// The bit rate of the video in kbps (only for video).
@@ -89,7 +90,7 @@ type BetaV2FileUploadResponse struct {
 	// `x,y,width,height`. If `customCoordinates` are not defined, then it is `null`.
 	// Send `customCoordinates` in `responseFields` in API request to get the value of
 	// this field.
-	CustomCoordinates string `json:"customCoordinates,nullable"`
+	CustomCoordinates string `json:"customCoordinates" api:"nullable"`
 	// A key-value data associated with the asset. Use `responseField` in API request
 	// to get `customMetadata` in the upload API response. Before setting any custom
 	// metadata on an asset, you have to create the field using custom metadata fields
@@ -151,7 +152,7 @@ type BetaV2FileUploadResponse struct {
 	// The array of tags associated with the asset. If no tags are set, it will be
 	// `null`. Send `tags` in `responseFields` in API request to get the value of this
 	// field.
-	Tags []string `json:"tags,nullable"`
+	Tags []string `json:"tags" api:"nullable"`
 	// In the case of an image, a small thumbnail URL.
 	ThumbnailURL string `json:"thumbnailUrl"`
 	// A publicly accessible URL of the file.
@@ -268,7 +269,7 @@ type BetaV2FileUploadResponseSelectedFieldsSchema struct {
 	//
 	// Any of "Text", "Textarea", "Number", "Date", "Boolean", "SingleSelect",
 	// "MultiSelect".
-	Type string `json:"type,required"`
+	Type string `json:"type" api:"required"`
 	// The default value for this custom metadata field. The value should match the
 	// `type` of custom metadata field.
 	DefaultValue BetaV2FileUploadResponseSelectedFieldsSchemaDefaultValueUnion `json:"defaultValue"`
@@ -569,7 +570,7 @@ type BetaV2FileUploadParams struct {
 	// *bytes.Reader, *bytes.Buffer, *strings.Reader, or any stream).
 	File io.Reader `json:"file,omitzero,required" format:"binary"`
 	// The name with which the file has to be uploaded.
-	FileName string `json:"fileName,required"`
+	FileName string `json:"fileName" api:"required"`
 	// This is the client-generated JSON Web Token (JWT). The ImageKit.io server uses
 	// it to authenticate and check that the upload request parameters have not been
 	// tampered with after the token has been generated. Learn how to create the token
@@ -880,11 +881,11 @@ func init() {
 type BetaV2FileUploadParamsTransformationPostTransformation struct {
 	// Transformation string (e.g. `w-200,h-200`).
 	// Same syntax as ImageKit URL-based transformations.
-	Value string `json:"value,required"`
+	Value string `json:"value" api:"required"`
 	// Transformation type.
 	//
 	// This field can be elided, and will marshal its zero value as "transformation".
-	Type constant.Transformation `json:"type,required"`
+	Type constant.Transformation `json:"type" api:"required"`
 	paramObj
 }
 
@@ -904,7 +905,7 @@ type BetaV2FileUploadParamsTransformationPostGifToVideo struct {
 	// Converts an animated GIF into an MP4.
 	//
 	// This field can be elided, and will marshal its zero value as "gif-to-video".
-	Type constant.GifToVideo `json:"type,required"`
+	Type constant.GifToVideo `json:"type" api:"required"`
 	paramObj
 }
 
@@ -924,7 +925,7 @@ type BetaV2FileUploadParamsTransformationPostThumbnail struct {
 	// Generates a thumbnail image.
 	//
 	// This field can be elided, and will marshal its zero value as "thumbnail".
-	Type constant.Thumbnail `json:"type,required"`
+	Type constant.Thumbnail `json:"type" api:"required"`
 	paramObj
 }
 
@@ -941,13 +942,13 @@ type BetaV2FileUploadParamsTransformationPostAbs struct {
 	// Streaming protocol to use (`hls` or `dash`).
 	//
 	// Any of "hls", "dash".
-	Protocol string `json:"protocol,omitzero,required"`
+	Protocol string `json:"protocol,omitzero" api:"required"`
 	// List of different representations you want to create separated by an underscore.
-	Value string `json:"value,required"`
+	Value string `json:"value" api:"required"`
 	// Adaptive Bitrate Streaming (ABS) setup.
 	//
 	// This field can be elided, and will marshal its zero value as "abs".
-	Type constant.Abs `json:"type,required"`
+	Type constant.Abs `json:"type" api:"required"`
 	paramObj
 }
 
diff --git a/betav2file_test.go b/betav2file_test.go
index 8f52587..029636d 100644
--- a/betav2file_test.go
+++ b/betav2file_test.go
@@ -17,7 +17,7 @@ import (
 )
 
 func TestBetaV2FileUploadWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/cacheinvalidation.go b/cacheinvalidation.go
index 8e24626..9355d47 100644
--- a/cacheinvalidation.go
+++ b/cacheinvalidation.go
@@ -104,7 +104,7 @@ const (
 
 type CacheInvalidationNewParams struct {
 	// The full URL of the file to be purged.
-	URL string `json:"url,required" format:"uri"`
+	URL string `json:"url" api:"required" format:"uri"`
 	paramObj
 }
 
diff --git a/cacheinvalidation_test.go b/cacheinvalidation_test.go
index 2e12514..ac4ecc1 100644
--- a/cacheinvalidation_test.go
+++ b/cacheinvalidation_test.go
@@ -14,7 +14,7 @@ import (
 )
 
 func TestCacheInvalidationNew(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -40,7 +40,7 @@ func TestCacheInvalidationNew(t *testing.T) {
 }
 
 func TestCacheInvalidationGet(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/custommetadatafield.go b/custommetadatafield.go
index eb701f8..5db5dd5 100644
--- a/custommetadatafield.go
+++ b/custommetadatafield.go
@@ -92,16 +92,16 @@ func (r *CustomMetadataFieldService) Delete(ctx context.Context, id string, opts
 // Object containing details of a custom metadata field.
 type CustomMetadataField struct {
 	// Unique identifier for the custom metadata field. Use this to update the field.
-	ID string `json:"id,required"`
+	ID string `json:"id" api:"required"`
 	// Human readable name of the custom metadata field. This name is displayed as form
 	// field label to the users while setting field value on the asset in the media
 	// library UI.
-	Label string `json:"label,required"`
+	Label string `json:"label" api:"required"`
 	// API name of the custom metadata field. This becomes the key while setting
 	// `customMetadata` (key-value object) for an asset using upload or update API.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// An object that describes the rules for the custom metadata field value.
-	Schema CustomMetadataFieldSchema `json:"schema,required"`
+	Schema CustomMetadataFieldSchema `json:"schema" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		ID          respjson.Field
@@ -125,7 +125,7 @@ type CustomMetadataFieldSchema struct {
 	//
 	// Any of "Text", "Textarea", "Number", "Date", "Boolean", "SingleSelect",
 	// "MultiSelect".
-	Type string `json:"type,required"`
+	Type string `json:"type" api:"required"`
 	// The default value for this custom metadata field. Data type of default value
 	// depends on the field type.
 	DefaultValue CustomMetadataFieldSchemaDefaultValueUnion `json:"defaultValue"`
@@ -399,11 +399,11 @@ type CustomMetadataFieldNewParams struct {
 	// all non deleted custom metadata fields. This name is displayed as form field
 	// label to the users while setting field value on an asset in the media library
 	// UI.
-	Label string `json:"label,required"`
+	Label string `json:"label" api:"required"`
 	// API name of the custom metadata field. This should be unique across all
 	// (including deleted) custom metadata fields.
-	Name   string                             `json:"name,required"`
-	Schema CustomMetadataFieldNewParamsSchema `json:"schema,omitzero,required"`
+	Name   string                             `json:"name" api:"required"`
+	Schema CustomMetadataFieldNewParamsSchema `json:"schema,omitzero" api:"required"`
 	paramObj
 }
 
@@ -421,7 +421,7 @@ type CustomMetadataFieldNewParamsSchema struct {
 	//
 	// Any of "Text", "Textarea", "Number", "Date", "Boolean", "SingleSelect",
 	// "MultiSelect".
-	Type string `json:"type,omitzero,required"`
+	Type string `json:"type,omitzero" api:"required"`
 	// Sets this custom metadata field as required. Setting custom metadata fields on
 	// an asset will throw error if the value for all required fields are not present
 	// in upload or update asset API request body.
diff --git a/custommetadatafield_test.go b/custommetadatafield_test.go
index c3cb073..ca9bbbc 100644
--- a/custommetadatafield_test.go
+++ b/custommetadatafield_test.go
@@ -14,7 +14,7 @@ import (
 )
 
 func TestCustomMetadataFieldNewWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -69,7 +69,7 @@ func TestCustomMetadataFieldNewWithOptionalParams(t *testing.T) {
 }
 
 func TestCustomMetadataFieldUpdateWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -126,7 +126,7 @@ func TestCustomMetadataFieldUpdateWithOptionalParams(t *testing.T) {
 }
 
 func TestCustomMetadataFieldListWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -153,7 +153,7 @@ func TestCustomMetadataFieldListWithOptionalParams(t *testing.T) {
 }
 
 func TestCustomMetadataFieldDelete(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/dummy_test.go b/dummy_test.go
index 2ffd02b..2964404 100644
--- a/dummy_test.go
+++ b/dummy_test.go
@@ -16,7 +16,7 @@ import (
 )
 
 func TestDummyNewWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -173,7 +173,9 @@ func TestDummyNewWithOptionalParams(t *testing.T) {
 					CropMode:        shared.TransformationCropModePadResize,
 					DefaultImage:    imagekit.String("defaultImage"),
 					Distort:         imagekit.String("distort"),
-					Dpr:             imagekit.Float(2),
+					Dpr: shared.TransformationDprUnionParam{
+						OfFloat: imagekit.Float(2),
+					},
 					Duration: shared.TransformationDurationUnionParam{
 						OfFloat: imagekit.Float(0),
 					},
@@ -355,7 +357,9 @@ func TestDummyNewWithOptionalParams(t *testing.T) {
 				CropMode:        shared.TransformationCropModePadResize,
 				DefaultImage:    imagekit.String("defaultImage"),
 				Distort:         imagekit.String("distort"),
-				Dpr:             imagekit.Float(2),
+				Dpr: shared.TransformationDprUnionParam{
+					OfFloat: imagekit.Float(2),
+				},
 				Duration: shared.TransformationDurationUnionParam{
 					OfFloat: imagekit.Float(0),
 				},
@@ -670,7 +674,9 @@ func TestDummyNewWithOptionalParams(t *testing.T) {
 				CropMode:        shared.TransformationCropModePadResize,
 				DefaultImage:    imagekit.String("defaultImage"),
 				Distort:         imagekit.String("distort"),
-				Dpr:             imagekit.Float(2),
+				Dpr: shared.TransformationDprUnionParam{
+					OfFloat: imagekit.Float(2),
+				},
 				Duration: shared.TransformationDurationUnionParam{
 					OfFloat: imagekit.Float(0),
 				},
@@ -948,7 +954,9 @@ func TestDummyNewWithOptionalParams(t *testing.T) {
 			CropMode:        shared.TransformationCropModePadResize,
 			DefaultImage:    imagekit.String("defaultImage"),
 			Distort:         imagekit.String("distort"),
-			Dpr:             imagekit.Float(2),
+			Dpr: shared.TransformationDprUnionParam{
+				OfFloat: imagekit.Float(2),
+			},
 			Duration: shared.TransformationDurationUnionParam{
 				OfFloat: imagekit.Float(0),
 			},
@@ -1124,7 +1132,9 @@ func TestDummyNewWithOptionalParams(t *testing.T) {
 				CropMode:        shared.TransformationCropModePadResize,
 				DefaultImage:    imagekit.String("defaultImage"),
 				Distort:         imagekit.String("distort"),
-				Dpr:             imagekit.Float(2),
+				Dpr: shared.TransformationDprUnionParam{
+					OfFloat: imagekit.Float(2),
+				},
 				Duration: shared.TransformationDurationUnionParam{
 					OfFloat: imagekit.Float(0),
 				},
diff --git a/file.go b/file.go
index bbd0f90..b7955d8 100644
--- a/file.go
+++ b/file.go
@@ -141,10 +141,11 @@ func (r *FileService) Rename(ctx context.Context, body FileRenameParams, opts ..
 // by verifying the entire payload using JWT.
 //
 // **File size limit** \
-// On the free plan, the maximum upload file sizes are 20MB for images, audio, and raw
-// files and 100MB for videos. On the paid plan, these limits increase to 40MB for images,
-// audio, and raw files and 2GB for videos. These limits can be further increased with
-// higher-tier plans.
+// On the free plan, the maximum upload file sizes are 25MB for images, audio, and raw
+// files and 100MB for videos. On the Lite paid plan, these limits increase to 40MB
+// for images, audio, and raw files and 300MB for videos, whereas on the Pro paid plan,
+// these limits increase to 50MB for images, audio, and raw files and 2GB for videos.
+// These limits can be further increased with enterprise plans.
 //
 // **Version limit** \
 // A file can have a maximum of 100 versions.
@@ -168,7 +169,7 @@ func (r *FileService) Upload(ctx context.Context, body FileUploadParams, opts ..
 // Object containing details of a file or file version.
 type File struct {
 	// An array of tags assigned to the file by auto tagging.
-	AITags []FileAITag `json:"AITags,nullable"`
+	AITags []FileAITag `json:"AITags" api:"nullable"`
 	// The audio codec used in the video (only for video/audio).
 	AudioCodec string `json:"audioCodec"`
 	// The bit rate of the video in kbps (only for video).
@@ -177,7 +178,7 @@ type File struct {
 	// format.
 	CreatedAt time.Time `json:"createdAt" format:"date-time"`
 	// An string with custom coordinates of the file.
-	CustomCoordinates string `json:"customCoordinates,nullable"`
+	CustomCoordinates string `json:"customCoordinates" api:"nullable"`
 	// An object with custom metadata for the file.
 	CustomMetadata map[string]any `json:"customMetadata"`
 	// Optional text to describe the contents of the file. Can be set by the user or
@@ -221,7 +222,7 @@ type File struct {
 	Size float64 `json:"size"`
 	// An array of tags assigned to the file. Tags are used to search files in the
 	// media library.
-	Tags []string `json:"tags,nullable"`
+	Tags []string `json:"tags" api:"nullable"`
 	// URL of the thumbnail image. This URL is used to access the thumbnail image of
 	// the file in the media library.
 	Thumbnail string `json:"thumbnail" format:"uri"`
@@ -310,7 +311,7 @@ type FileSelectedFieldsSchema struct {
 	//
 	// Any of "Text", "Textarea", "Number", "Date", "Boolean", "SingleSelect",
 	// "MultiSelect".
-	Type string `json:"type,required"`
+	Type string `json:"type" api:"required"`
 	// The default value for this custom metadata field. The value should match the
 	// `type` of custom metadata field.
 	DefaultValue FileSelectedFieldsSchemaDefaultValueUnion `json:"defaultValue"`
@@ -1018,7 +1019,7 @@ func (r *UpdateFileRequestChangePublicationStatusParam) UnmarshalJSON(data []byt
 // The property IsPublished is required.
 type UpdateFileRequestChangePublicationStatusPublishParam struct {
 	// Set to `true` to publish the file. Set to `false` to unpublish the file.
-	IsPublished bool `json:"isPublished,required"`
+	IsPublished bool `json:"isPublished" api:"required"`
 	// Set to `true` to publish/unpublish all versions of the file. Set to `false` to
 	// publish/unpublish only the current version of the file.
 	IncludeFileVersions param.Opt[bool] `json:"includeFileVersions,omitzero"`
@@ -1129,7 +1130,7 @@ func (r *FileRenameResponse) UnmarshalJSON(data []byte) error {
 // Object containing details of a successful upload.
 type FileUploadResponse struct {
 	// An array of tags assigned to the uploaded file by auto tagging.
-	AITags []FileUploadResponseAITag `json:"AITags,nullable"`
+	AITags []FileUploadResponseAITag `json:"AITags" api:"nullable"`
 	// The audio codec used in the video (only for video).
 	AudioCodec string `json:"audioCodec"`
 	// The bit rate of the video in kbps (only for video).
@@ -1138,7 +1139,7 @@ type FileUploadResponse struct {
 	// `x,y,width,height`. If `customCoordinates` are not defined, then it is `null`.
 	// Send `customCoordinates` in `responseFields` in API request to get the value of
 	// this field.
-	CustomCoordinates string `json:"customCoordinates,nullable"`
+	CustomCoordinates string `json:"customCoordinates" api:"nullable"`
 	// A key-value data associated with the asset. Use `responseField` in API request
 	// to get `customMetadata` in the upload API response. Before setting any custom
 	// metadata on an asset, you have to create the field using custom metadata fields
@@ -1200,7 +1201,7 @@ type FileUploadResponse struct {
 	// The array of tags associated with the asset. If no tags are set, it will be
 	// `null`. Send `tags` in `responseFields` in API request to get the value of this
 	// field.
-	Tags []string `json:"tags,nullable"`
+	Tags []string `json:"tags" api:"nullable"`
 	// In the case of an image, a small thumbnail URL.
 	ThumbnailURL string `json:"thumbnailUrl"`
 	// A publicly accessible URL of the file.
@@ -1317,7 +1318,7 @@ type FileUploadResponseSelectedFieldsSchema struct {
 	//
 	// Any of "Text", "Textarea", "Number", "Date", "Boolean", "SingleSelect",
 	// "MultiSelect".
-	Type string `json:"type,required"`
+	Type string `json:"type" api:"required"`
 	// The default value for this custom metadata field. The value should match the
 	// `type` of custom metadata field.
 	DefaultValue FileUploadResponseSelectedFieldsSchemaDefaultValueUnion `json:"defaultValue"`
@@ -1620,9 +1621,9 @@ func (r *FileUpdateParams) UnmarshalJSON(data []byte) error {
 
 type FileCopyParams struct {
 	// Full path to the folder you want to copy the above file into.
-	DestinationPath string `json:"destinationPath,required"`
+	DestinationPath string `json:"destinationPath" api:"required"`
 	// The full path of the file you want to copy.
-	SourceFilePath string `json:"sourceFilePath,required"`
+	SourceFilePath string `json:"sourceFilePath" api:"required"`
 	// Option to copy all versions of a file. By default, only the current version of
 	// the file is copied. When set to true, all versions of the file will be copied.
 	// Default value - `false`.
@@ -1640,9 +1641,9 @@ func (r *FileCopyParams) UnmarshalJSON(data []byte) error {
 
 type FileMoveParams struct {
 	// Full path to the folder you want to move the above file into.
-	DestinationPath string `json:"destinationPath,required"`
+	DestinationPath string `json:"destinationPath" api:"required"`
 	// The full path of the file you want to move.
-	SourceFilePath string `json:"sourceFilePath,required"`
+	SourceFilePath string `json:"sourceFilePath" api:"required"`
 	paramObj
 }
 
@@ -1656,14 +1657,14 @@ func (r *FileMoveParams) UnmarshalJSON(data []byte) error {
 
 type FileRenameParams struct {
 	// The full path of the file you want to rename.
-	FilePath string `json:"filePath,required"`
+	FilePath string `json:"filePath" api:"required"`
 	// The new name of the file. A filename can contain:
 	//
 	// Alphanumeric Characters: `a-z`, `A-Z`, `0-9` (including Unicode letters, marks,
 	// and numerals in other languages). Special Characters: `.`, `_`, and `-`.
 	//
 	// Any other character, including space, will be replaced by `_`.
-	NewFileName string `json:"newFileName,required"`
+	NewFileName string `json:"newFileName" api:"required"`
 	// Option to purge cache for the old file and its versions' URLs.
 	//
 	// When set to true, it will internally issue a purge cache request on CDN to
@@ -1702,7 +1703,7 @@ type FileUploadParams struct {
 	// - Special Characters: `.`, `-`
 	//
 	// Any other character including space will be replaced by `_`
-	FileName string `json:"fileName,required"`
+	FileName string `json:"fileName" api:"required"`
 	// A unique value that the ImageKit.io server will use to recognize and prevent
 	// subsequent retries for the same request. We suggest using V4 UUIDs, or another
 	// random string with enough entropy to avoid collisions. This field is only
@@ -2029,11 +2030,11 @@ func init() {
 type FileUploadParamsTransformationPostTransformation struct {
 	// Transformation string (e.g. `w-200,h-200`).
 	// Same syntax as ImageKit URL-based transformations.
-	Value string `json:"value,required"`
+	Value string `json:"value" api:"required"`
 	// Transformation type.
 	//
 	// This field can be elided, and will marshal its zero value as "transformation".
-	Type constant.Transformation `json:"type,required"`
+	Type constant.Transformation `json:"type" api:"required"`
 	paramObj
 }
 
@@ -2053,7 +2054,7 @@ type FileUploadParamsTransformationPostGifToVideo struct {
 	// Converts an animated GIF into an MP4.
 	//
 	// This field can be elided, and will marshal its zero value as "gif-to-video".
-	Type constant.GifToVideo `json:"type,required"`
+	Type constant.GifToVideo `json:"type" api:"required"`
 	paramObj
 }
 
@@ -2073,7 +2074,7 @@ type FileUploadParamsTransformationPostThumbnail struct {
 	// Generates a thumbnail image.
 	//
 	// This field can be elided, and will marshal its zero value as "thumbnail".
-	Type constant.Thumbnail `json:"type,required"`
+	Type constant.Thumbnail `json:"type" api:"required"`
 	paramObj
 }
 
@@ -2090,13 +2091,13 @@ type FileUploadParamsTransformationPostAbs struct {
 	// Streaming protocol to use (`hls` or `dash`).
 	//
 	// Any of "hls", "dash".
-	Protocol string `json:"protocol,omitzero,required"`
+	Protocol string `json:"protocol,omitzero" api:"required"`
 	// List of different representations you want to create separated by an underscore.
-	Value string `json:"value,required"`
+	Value string `json:"value" api:"required"`
 	// Adaptive Bitrate Streaming (ABS) setup.
 	//
 	// This field can be elided, and will marshal its zero value as "abs".
-	Type constant.Abs `json:"type,required"`
+	Type constant.Abs `json:"type" api:"required"`
 	paramObj
 }
 
diff --git a/file_test.go b/file_test.go
index 6b57c74..3927aa2 100644
--- a/file_test.go
+++ b/file_test.go
@@ -17,7 +17,7 @@ import (
 )
 
 func TestFileUpdateWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -100,7 +100,7 @@ func TestFileUpdateWithOptionalParams(t *testing.T) {
 }
 
 func TestFileDelete(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -124,7 +124,7 @@ func TestFileDelete(t *testing.T) {
 }
 
 func TestFileCopyWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -152,7 +152,7 @@ func TestFileCopyWithOptionalParams(t *testing.T) {
 }
 
 func TestFileGet(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -176,7 +176,7 @@ func TestFileGet(t *testing.T) {
 }
 
 func TestFileMove(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -203,7 +203,7 @@ func TestFileMove(t *testing.T) {
 }
 
 func TestFileRenameWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -231,7 +231,7 @@ func TestFileRenameWithOptionalParams(t *testing.T) {
 }
 
 func TestFileUploadWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/filebulk.go b/filebulk.go
index 76b76f6..0dca02e 100644
--- a/filebulk.go
+++ b/filebulk.go
@@ -144,7 +144,7 @@ func (r *FileBulkRemoveTagsResponse) UnmarshalJSON(data []byte) error {
 
 type FileBulkDeleteParams struct {
 	// An array of fileIds which you want to delete.
-	FileIDs []string `json:"fileIds,omitzero,required"`
+	FileIDs []string `json:"fileIds,omitzero" api:"required"`
 	paramObj
 }
 
@@ -158,9 +158,9 @@ func (r *FileBulkDeleteParams) UnmarshalJSON(data []byte) error {
 
 type FileBulkAddTagsParams struct {
 	// An array of fileIds to which you want to add tags.
-	FileIDs []string `json:"fileIds,omitzero,required"`
+	FileIDs []string `json:"fileIds,omitzero" api:"required"`
 	// An array of tags that you want to add to the files.
-	Tags []string `json:"tags,omitzero,required"`
+	Tags []string `json:"tags,omitzero" api:"required"`
 	paramObj
 }
 
@@ -174,9 +174,9 @@ func (r *FileBulkAddTagsParams) UnmarshalJSON(data []byte) error {
 
 type FileBulkRemoveAITagsParams struct {
 	// An array of AITags that you want to remove from the files.
-	AITags []string `json:"AITags,omitzero,required"`
+	AITags []string `json:"AITags,omitzero" api:"required"`
 	// An array of fileIds from which you want to remove AITags.
-	FileIDs []string `json:"fileIds,omitzero,required"`
+	FileIDs []string `json:"fileIds,omitzero" api:"required"`
 	paramObj
 }
 
@@ -190,9 +190,9 @@ func (r *FileBulkRemoveAITagsParams) UnmarshalJSON(data []byte) error {
 
 type FileBulkRemoveTagsParams struct {
 	// An array of fileIds from which you want to remove tags.
-	FileIDs []string `json:"fileIds,omitzero,required"`
+	FileIDs []string `json:"fileIds,omitzero" api:"required"`
 	// An array of tags that you want to remove from the files.
-	Tags []string `json:"tags,omitzero,required"`
+	Tags []string `json:"tags,omitzero" api:"required"`
 	paramObj
 }
 
diff --git a/filebulk_test.go b/filebulk_test.go
index 1cb0db1..5da35a6 100644
--- a/filebulk_test.go
+++ b/filebulk_test.go
@@ -14,7 +14,7 @@ import (
 )
 
 func TestFileBulkDelete(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -40,7 +40,7 @@ func TestFileBulkDelete(t *testing.T) {
 }
 
 func TestFileBulkAddTags(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -67,7 +67,7 @@ func TestFileBulkAddTags(t *testing.T) {
 }
 
 func TestFileBulkRemoveAITags(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -94,7 +94,7 @@ func TestFileBulkRemoveAITags(t *testing.T) {
 }
 
 func TestFileBulkRemoveTags(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/filemetadata.go b/filemetadata.go
index 07f7b05..c864368 100644
--- a/filemetadata.go
+++ b/filemetadata.go
@@ -62,7 +62,7 @@ func (r *FileMetadataService) GetFromURL(ctx context.Context, query FileMetadata
 type FileMetadataGetFromURLParams struct {
 	// Should be a valid file URL. It should be accessible using your ImageKit.io
 	// account.
-	URL string `query:"url,required" format:"uri" json:"-"`
+	URL string `query:"url" api:"required" format:"uri" json:"-"`
 	paramObj
 }
 
diff --git a/filemetadata_test.go b/filemetadata_test.go
index 0245da8..d5f2771 100644
--- a/filemetadata_test.go
+++ b/filemetadata_test.go
@@ -14,7 +14,7 @@ import (
 )
 
 func TestFileMetadataGet(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -38,7 +38,7 @@ func TestFileMetadataGet(t *testing.T) {
 }
 
 func TestFileMetadataGetFromURL(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/fileversion.go b/fileversion.go
index 6a07b1d..5ff6ca3 100644
--- a/fileversion.go
+++ b/fileversion.go
@@ -112,16 +112,16 @@ func (r *FileVersionDeleteResponse) UnmarshalJSON(data []byte) error {
 }
 
 type FileVersionDeleteParams struct {
-	FileID string `path:"fileId,required" json:"-"`
+	FileID string `path:"fileId" api:"required" json:"-"`
 	paramObj
 }
 
 type FileVersionGetParams struct {
-	FileID string `path:"fileId,required" json:"-"`
+	FileID string `path:"fileId" api:"required" json:"-"`
 	paramObj
 }
 
 type FileVersionRestoreParams struct {
-	FileID string `path:"fileId,required" json:"-"`
+	FileID string `path:"fileId" api:"required" json:"-"`
 	paramObj
 }
diff --git a/fileversion_test.go b/fileversion_test.go
index e6d5499..80d6d42 100644
--- a/fileversion_test.go
+++ b/fileversion_test.go
@@ -14,7 +14,7 @@ import (
 )
 
 func TestFileVersionList(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -38,7 +38,7 @@ func TestFileVersionList(t *testing.T) {
 }
 
 func TestFileVersionDelete(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -68,7 +68,7 @@ func TestFileVersionDelete(t *testing.T) {
 }
 
 func TestFileVersionGet(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -98,7 +98,7 @@ func TestFileVersionGet(t *testing.T) {
 }
 
 func TestFileVersionRestore(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/folder.go b/folder.go
index e21c026..dce9a10 100644
--- a/folder.go
+++ b/folder.go
@@ -118,7 +118,7 @@ func (r *FolderDeleteResponse) UnmarshalJSON(data []byte) error {
 type FolderCopyResponse struct {
 	// Unique identifier of the bulk job. This can be used to check the status of the
 	// bulk job.
-	JobID string `json:"jobId,required"`
+	JobID string `json:"jobId" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		JobID       respjson.Field
@@ -137,7 +137,7 @@ func (r *FolderCopyResponse) UnmarshalJSON(data []byte) error {
 type FolderMoveResponse struct {
 	// Unique identifier of the bulk job. This can be used to check the status of the
 	// bulk job.
-	JobID string `json:"jobId,required"`
+	JobID string `json:"jobId" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		JobID       respjson.Field
@@ -156,7 +156,7 @@ func (r *FolderMoveResponse) UnmarshalJSON(data []byte) error {
 type FolderRenameResponse struct {
 	// Unique identifier of the bulk job. This can be used to check the status of the
 	// bulk job.
-	JobID string `json:"jobId,required"`
+	JobID string `json:"jobId" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		JobID       respjson.Field
@@ -177,7 +177,7 @@ type FolderNewParams struct {
 	// All characters except alphabets and numbers (inclusive of unicode letters,
 	// marks, and numerals in other languages) will be replaced by an underscore i.e.
 	// `_`.
-	FolderName string `json:"folderName,required"`
+	FolderName string `json:"folderName" api:"required"`
 	// The folder where the new folder should be created, for root use `/` else the
 	// path e.g. `containing/folder/`.
 	//
@@ -185,7 +185,7 @@ type FolderNewParams struct {
 	// be automatically created. For example, if you pass `/product/images/summer`,
 	// then `product`, `images`, and `summer` folders will be created if they don't
 	// already exist.
-	ParentFolderPath string `json:"parentFolderPath,required"`
+	ParentFolderPath string `json:"parentFolderPath" api:"required"`
 	paramObj
 }
 
@@ -199,7 +199,7 @@ func (r *FolderNewParams) UnmarshalJSON(data []byte) error {
 
 type FolderDeleteParams struct {
 	// Full path to the folder you want to delete. For example `/folder/to/delete/`.
-	FolderPath string `json:"folderPath,required"`
+	FolderPath string `json:"folderPath" api:"required"`
 	paramObj
 }
 
@@ -214,9 +214,9 @@ func (r *FolderDeleteParams) UnmarshalJSON(data []byte) error {
 type FolderCopyParams struct {
 	// Full path to the destination folder where you want to copy the source folder
 	// into.
-	DestinationPath string `json:"destinationPath,required"`
+	DestinationPath string `json:"destinationPath" api:"required"`
 	// The full path to the source folder you want to copy.
-	SourceFolderPath string `json:"sourceFolderPath,required"`
+	SourceFolderPath string `json:"sourceFolderPath" api:"required"`
 	// Option to copy all versions of files that are nested inside the selected folder.
 	// By default, only the current version of each file will be copied. When set to
 	// true, all versions of each file will be copied. Default value - `false`.
@@ -235,9 +235,9 @@ func (r *FolderCopyParams) UnmarshalJSON(data []byte) error {
 type FolderMoveParams struct {
 	// Full path to the destination folder where you want to move the source folder
 	// into.
-	DestinationPath string `json:"destinationPath,required"`
+	DestinationPath string `json:"destinationPath" api:"required"`
 	// The full path to the source folder you want to move.
-	SourceFolderPath string `json:"sourceFolderPath,required"`
+	SourceFolderPath string `json:"sourceFolderPath" api:"required"`
 	paramObj
 }
 
@@ -251,13 +251,13 @@ func (r *FolderMoveParams) UnmarshalJSON(data []byte) error {
 
 type FolderRenameParams struct {
 	// The full path to the folder you want to rename.
-	FolderPath string `json:"folderPath,required"`
+	FolderPath string `json:"folderPath" api:"required"`
 	// The new name for the folder.
 	//
 	// All characters except alphabets and numbers (inclusive of unicode letters,
 	// marks, and numerals in other languages) and `-` will be replaced by an
 	// underscore i.e. `_`.
-	NewFolderName string `json:"newFolderName,required"`
+	NewFolderName string `json:"newFolderName" api:"required"`
 	// Option to purge cache for the old nested files and their versions' URLs.
 	//
 	// When set to true, it will internally issue a purge cache request on CDN to
diff --git a/folder_test.go b/folder_test.go
index b891101..ec03029 100644
--- a/folder_test.go
+++ b/folder_test.go
@@ -14,7 +14,7 @@ import (
 )
 
 func TestFolderNew(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -41,7 +41,7 @@ func TestFolderNew(t *testing.T) {
 }
 
 func TestFolderDelete(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -67,7 +67,7 @@ func TestFolderDelete(t *testing.T) {
 }
 
 func TestFolderCopyWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -95,7 +95,7 @@ func TestFolderCopyWithOptionalParams(t *testing.T) {
 }
 
 func TestFolderMove(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -122,7 +122,7 @@ func TestFolderMove(t *testing.T) {
 }
 
 func TestFolderRenameWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/folderjob_test.go b/folderjob_test.go
index a4c9541..f03c188 100644
--- a/folderjob_test.go
+++ b/folderjob_test.go
@@ -14,7 +14,7 @@ import (
 )
 
 func TestFolderJobGet(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/go.mod b/go.mod
index f306eb5..69e4a1a 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/imagekit-developer/imagekit-go/v2
 go 1.22
 
 require (
-	github.com/standard-webhooks/standard-webhooks/libraries v0.0.0-20260114220421-3f69fd681bb0
+	github.com/standard-webhooks/standard-webhooks/libraries v0.0.0-20260218190227-a1773d7ffc57
 	github.com/tidwall/gjson v1.18.0
 	github.com/tidwall/sjson v1.2.5
 )
diff --git a/go.sum b/go.sum
index b09e3fe..796f80d 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-github.com/standard-webhooks/standard-webhooks/libraries v0.0.0-20260114220421-3f69fd681bb0 h1:EZXYkItlI9VXF+3x/VFkP8JKa6ibJVZAMjHGfdjzHC8=
-github.com/standard-webhooks/standard-webhooks/libraries v0.0.0-20260114220421-3f69fd681bb0/go.mod h1:L1MQhA6x4dn9r007T033lsaZMv9EmBAdXyU/+EF40fo=
+github.com/standard-webhooks/standard-webhooks/libraries v0.0.0-20260218190227-a1773d7ffc57 h1:Tyc4ahpgMG94JVYI31kubJ7+W/GQIfXW3Oyrp3nzoeE=
+github.com/standard-webhooks/standard-webhooks/libraries v0.0.0-20260218190227-a1773d7ffc57/go.mod h1:L1MQhA6x4dn9r007T033lsaZMv9EmBAdXyU/+EF40fo=
 github.com/tidwall/gjson v1.14.2/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
 github.com/tidwall/gjson v1.18.0 h1:FIDeeyB800efLX89e5a8Y0BNH+LOngJyGrIWxG2FKQY=
 github.com/tidwall/gjson v1.18.0/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
diff --git a/internal/apiform/form_test.go b/internal/apiform/form_test.go
index 86cb43d..8e5efa8 100644
--- a/internal/apiform/form_test.go
+++ b/internal/apiform/form_test.go
@@ -48,18 +48,18 @@ type DateTime struct {
 
 type AdditionalProperties struct {
 	A      bool           `form:"a"`
-	Extras map[string]any `form:"-,extras"`
+	Extras map[string]any `form:"-" api:"extrafields"`
 }
 
 type TypedAdditionalProperties struct {
 	A      bool           `form:"a"`
-	Extras map[string]int `form:"-,extras"`
+	Extras map[string]int `form:"-" api:"extrafields"`
 }
 
 type EmbeddedStructs struct {
 	AdditionalProperties
 	A      *int           `form:"number2"`
-	Extras map[string]any `form:"-,extras"`
+	Extras map[string]any `form:"-" api:"extrafields"`
 }
 
 type Recursive struct {
diff --git a/internal/apiform/tag.go b/internal/apiform/tag.go
index 736fc1e..b353617 100644
--- a/internal/apiform/tag.go
+++ b/internal/apiform/tag.go
@@ -5,6 +5,7 @@ import (
 	"strings"
 )
 
+const apiStructTag = "api"
 const jsonStructTag = "json"
 const formStructTag = "form"
 const formatStructTag = "format"
@@ -42,9 +43,27 @@ func parseFormStructTag(field reflect.StructField) (tag parsedStructTag, ok bool
 			tag.omitzero = true
 		}
 	}
+
+	parseApiStructTag(field, &tag)
 	return
 }
 
+func parseApiStructTag(field reflect.StructField, tag *parsedStructTag) {
+	raw, ok := field.Tag.Lookup(apiStructTag)
+	if !ok {
+		return
+	}
+	parts := strings.Split(raw, ",")
+	for _, part := range parts {
+		switch part {
+		case "extrafields":
+			tag.extras = true
+		case "required":
+			tag.required = true
+		}
+	}
+}
+
 func parseFormatStructTag(field reflect.StructField) (format string, ok bool) {
 	format, ok = field.Tag.Lookup(formatStructTag)
 	return
diff --git a/internal/apijson/decodeparam_test.go b/internal/apijson/decodeparam_test.go
index be371d0..198136d 100644
--- a/internal/apijson/decodeparam_test.go
+++ b/internal/apijson/decodeparam_test.go
@@ -50,10 +50,10 @@ func TestOptionalDecoders(t *testing.T) {
 type paramObject = param.APIObject
 
 type BasicObject struct {
-	ReqInt    int64   `json:"req_int,required"`
-	ReqFloat  float64 `json:"req_float,required"`
-	ReqString string  `json:"req_string,required"`
-	ReqBool   bool    `json:"req_bool,required"`
+	ReqInt    int64   `json:"req_int" api:"required"`
+	ReqFloat  float64 `json:"req_float" api:"required"`
+	ReqString string  `json:"req_string" api:"required"`
+	ReqBool   bool    `json:"req_bool" api:"required"`
 
 	OptInt    param.Opt[int64]   `json:"opt_int"`
 	OptFloat  param.Opt[float64] `json:"opt_float"`
@@ -110,7 +110,7 @@ func TestBasicObject(t *testing.T) {
 }
 
 type ComplexObject struct {
-	Basic BasicObject `json:"basic,required"`
+	Basic BasicObject `json:"basic" api:"required"`
 	Enum  string      `json:"enum"`
 	paramObject
 }
@@ -152,29 +152,29 @@ func TestComplexObject(t *testing.T) {
 type paramUnion = param.APIUnion
 
 type MemberA struct {
-	Name string `json:"name,required"`
-	Age  int    `json:"age,required"`
+	Name string `json:"name" api:"required"`
+	Age  int    `json:"age" api:"required"`
 }
 
 type MemberB struct {
-	Name string `json:"name,required"`
-	Age  string `json:"age,required"`
+	Name string `json:"name" api:"required"`
+	Age  string `json:"age" api:"required"`
 }
 
 type MemberC struct {
-	Name   string `json:"name,required"`
-	Age    int    `json:"age,required"`
+	Name   string `json:"name" api:"required"`
+	Age    int    `json:"age" api:"required"`
 	Status string `json:"status"`
 }
 
 type MemberD struct {
-	Cost   int    `json:"cost,required"`
-	Status string `json:"status,required"`
+	Cost   int    `json:"cost" api:"required"`
+	Status string `json:"status" api:"required"`
 }
 
 type MemberE struct {
-	Cost   int    `json:"cost,required"`
-	Status string `json:"status,required"`
+	Cost   int    `json:"cost" api:"required"`
+	Status string `json:"status" api:"required"`
 }
 
 type MemberF struct {
@@ -318,21 +318,21 @@ func (c ConstantB) Default() string { return "B" }
 func (c ConstantC) Default() string { return "C" }
 
 type DiscVariantA struct {
-	Name string    `json:"name,required"`
-	Age  int       `json:"age,required"`
-	Type ConstantA `json:"type,required"`
+	Name string    `json:"name" api:"required"`
+	Age  int       `json:"age" api:"required"`
+	Type ConstantA `json:"type" api:"required"`
 }
 
 type DiscVariantB struct {
-	Name string    `json:"name,required"`
-	Age  int       `json:"age,required"`
-	Type ConstantB `json:"type,required"`
+	Name string    `json:"name" api:"required"`
+	Age  int       `json:"age" api:"required"`
+	Type ConstantB `json:"type" api:"required"`
 }
 
 type DiscVariantC struct {
-	Name string    `json:"name,required"`
-	Age  float64   `json:"age,required"`
-	Type ConstantC `json:"type,required"`
+	Name string    `json:"name" api:"required"`
+	Age  float64   `json:"age" api:"required"`
+	Type ConstantC `json:"type" api:"required"`
 }
 
 type DiscriminatedUnion struct {
@@ -352,13 +352,13 @@ func init() {
 }
 
 type FooVariant struct {
-	Type  string `json:"type,required"`
-	Value string `json:"value,required"`
+	Type  string `json:"type" api:"required"`
+	Value string `json:"value" api:"required"`
 }
 
 type BarVariant struct {
-	Type   string `json:"type,required"`
-	Enable bool   `json:"enable,required"`
+	Type   string `json:"type" api:"required"`
+	Enable bool   `json:"enable" api:"required"`
 }
 
 type MultiDiscriminatorUnion struct {
diff --git a/internal/apijson/decoderesp_test.go b/internal/apijson/decoderesp_test.go
index ca22fba..f467265 100644
--- a/internal/apijson/decoderesp_test.go
+++ b/internal/apijson/decoderesp_test.go
@@ -8,7 +8,7 @@ import (
 )
 
 type StructWithNullExtraField struct {
-	Results []string `json:"results,required"`
+	Results []string `json:"results" api:"required"`
 	JSON    struct {
 		Results     respjson.Field
 		ExtraFields map[string]respjson.Field
diff --git a/internal/apijson/json_test.go b/internal/apijson/json_test.go
index 02904d2..fac9fcc 100644
--- a/internal/apijson/json_test.go
+++ b/internal/apijson/json_test.go
@@ -40,12 +40,12 @@ type DateTime struct {
 
 type AdditionalProperties struct {
 	A           bool           `json:"a"`
-	ExtraFields map[string]any `json:"-,extras"`
+	ExtraFields map[string]any `json:"-" api:"extrafields"`
 }
 
 type TypedAdditionalProperties struct {
 	A           bool           `json:"a"`
-	ExtraFields map[string]int `json:"-,extras"`
+	ExtraFields map[string]int `json:"-" api:"extrafields"`
 }
 
 type EmbeddedStruct struct {
@@ -65,7 +65,7 @@ type EmbeddedStructJSON struct {
 type EmbeddedStructs struct {
 	EmbeddedStruct
 	A           *int           `json:"a"`
-	ExtraFields map[string]any `json:"-,extras"`
+	ExtraFields map[string]any `json:"-" api:"extrafields"`
 
 	JSON EmbeddedStructsJSON
 }
@@ -86,7 +86,7 @@ type JSONFieldStruct struct {
 	B           int64               `json:"b"`
 	C           string              `json:"c"`
 	D           string              `json:"d"`
-	ExtraFields map[string]int64    `json:",extras"`
+	ExtraFields map[string]int64    `json:"" api:"extrafields"`
 	JSON        JSONFieldStructJSON `json:",metadata"`
 }
 
diff --git a/internal/apijson/tag.go b/internal/apijson/tag.go
index 812fb3c..49731b8 100644
--- a/internal/apijson/tag.go
+++ b/internal/apijson/tag.go
@@ -5,6 +5,7 @@ import (
 	"strings"
 )
 
+const apiStructTag = "api"
 const jsonStructTag = "json"
 const formatStructTag = "format"
 
@@ -38,9 +39,28 @@ func parseJSONStructTag(field reflect.StructField) (tag parsedStructTag, ok bool
 			tag.inline = true
 		}
 	}
+
+	// the `api` struct tag is only used alongside `json` for custom behaviour
+	parseApiStructTag(field, &tag)
 	return
 }
 
+func parseApiStructTag(field reflect.StructField, tag *parsedStructTag) {
+	raw, ok := field.Tag.Lookup(apiStructTag)
+	if !ok {
+		return
+	}
+	parts := strings.Split(raw, ",")
+	for _, part := range parts {
+		switch part {
+		case "extrafields":
+			tag.extras = true
+		case "required":
+			tag.required = true
+		}
+	}
+}
+
 func parseFormatStructTag(field reflect.StructField) (format string, ok bool) {
 	format, ok = field.Tag.Lookup(formatStructTag)
 	return
diff --git a/internal/requestconfig/requestconfig.go b/internal/requestconfig/requestconfig.go
index 75e05ff..923e9f5 100644
--- a/internal/requestconfig/requestconfig.go
+++ b/internal/requestconfig/requestconfig.go
@@ -468,7 +468,11 @@ func (cfg *RequestConfig) Execute() (err error) {
 			res.Body.Close()
 		}
 
-		time.Sleep(retryDelay(res, retryCount))
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		case <-time.After(retryDelay(res, retryCount)):
+		}
 	}
 
 	// Save *http.Response if it is requested to, even if there was an error making the request. This is
diff --git a/internal/testutil/testutil.go b/internal/testutil/testutil.go
index 826d266..31103e9 100644
--- a/internal/testutil/testutil.go
+++ b/internal/testutil/testutil.go
@@ -16,10 +16,10 @@ func CheckTestServer(t *testing.T, url string) bool {
 				t.Fatalf("strconv.ParseBool(os.LookupEnv(%s)) failed: %s", SKIP_MOCK_TESTS, err)
 			}
 			if skip {
-				t.Skip("The test will not run without a mock Prism server running against your OpenAPI spec")
+				t.Skip("The test will not run without a mock server running against your OpenAPI spec")
 				return false
 			}
-			t.Errorf("The test will not run without a mock Prism server running against your OpenAPI spec. You can set the environment variable %s to true to skip running any tests that require the mock server", SKIP_MOCK_TESTS)
+			t.Errorf("The test will not run without a mock server running against your OpenAPI spec. You can set the environment variable %s to true to skip running any tests that require the mock server", SKIP_MOCK_TESTS)
 			return false
 		}
 	}
diff --git a/internal/version.go b/internal/version.go
index 0759deb..ebb76be 100644
--- a/internal/version.go
+++ b/internal/version.go
@@ -2,4 +2,4 @@
 
 package internal
 
-const PackageVersion = "2.2.0" // x-release-please-version
+const PackageVersion = "2.3.0" // x-release-please-version
diff --git a/packages/param/encoder.go b/packages/param/encoder.go
index b0410be..631e780 100644
--- a/packages/param/encoder.go
+++ b/packages/param/encoder.go
@@ -83,6 +83,9 @@ func MarshalUnion[T ParamStruct](metadata T, variants ...any) ([]byte, error) {
 		}
 	}
 	if nPresent == 0 || presentIdx == -1 {
+		if metadata.null() {
+			return []byte("null"), nil
+		}
 		if ovr, ok := metadata.Overrides(); ok {
 			return shimjson.Marshal(ovr)
 		}
diff --git a/packages/param/encoder_test.go b/packages/param/encoder_test.go
index a86612f..eed22a0 100644
--- a/packages/param/encoder_test.go
+++ b/packages/param/encoder_test.go
@@ -363,3 +363,15 @@ func TestOverriddenUnion(t *testing.T) {
 		})
 	}
 }
+
+func TestNullStructUnion(t *testing.T) {
+	nullUnion := param.NullStruct[PrimitiveUnion]()
+
+	b, err := json.Marshal(nullUnion)
+	if err != nil {
+		t.Fatalf("didn't expect error %v", err)
+	}
+	if string(b) != "null" {
+		t.Fatalf("expected null, received %s", string(b))
+	}
+}
diff --git a/packages/respjson/decoder_test.go b/packages/respjson/decoder_test.go
index ef5219c..665a6a8 100644
--- a/packages/respjson/decoder_test.go
+++ b/packages/respjson/decoder_test.go
@@ -30,7 +30,7 @@ func (r *UnionOfStringIntOrObject) UnmarshalJSON(data []byte) error {
 
 type SubFields struct {
 	OfBool bool   `json:",inline"`
-	Name   string `json:"name,required"`
+	Name   string `json:"name" api:"required"`
 	JSON   struct {
 		OfBool      rj.Field
 		Name        rj.Field
diff --git a/savedextension.go b/savedextension.go
index 1999c24..0911e8e 100644
--- a/savedextension.go
+++ b/savedextension.go
@@ -99,11 +99,11 @@ func (r *SavedExtensionService) Get(ctx context.Context, id string, opts ...opti
 type SavedExtensionNewParams struct {
 	// Configuration object for an extension (base extensions only, not saved extension
 	// references).
-	Config shared.ExtensionConfigUnionParam `json:"config,omitzero,required"`
+	Config shared.ExtensionConfigUnionParam `json:"config,omitzero" api:"required"`
 	// Description of what the saved extension does.
-	Description string `json:"description,required"`
+	Description string `json:"description" api:"required"`
 	// Name of the saved extension.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	paramObj
 }
 
diff --git a/savedextension_test.go b/savedextension_test.go
index effbeaf..1149d86 100644
--- a/savedextension_test.go
+++ b/savedextension_test.go
@@ -15,7 +15,7 @@ import (
 )
 
 func TestSavedExtensionNewWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -52,7 +52,7 @@ func TestSavedExtensionNewWithOptionalParams(t *testing.T) {
 }
 
 func TestSavedExtensionUpdateWithOptionalParams(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -93,7 +93,7 @@ func TestSavedExtensionUpdateWithOptionalParams(t *testing.T) {
 }
 
 func TestSavedExtensionList(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -117,7 +117,7 @@ func TestSavedExtensionList(t *testing.T) {
 }
 
 func TestSavedExtensionDelete(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
@@ -141,7 +141,7 @@ func TestSavedExtensionDelete(t *testing.T) {
 }
 
 func TestSavedExtensionGet(t *testing.T) {
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	baseURL := "http://localhost:4010"
 	if envURL, ok := os.LookupEnv("TEST_API_BASE_URL"); ok {
 		baseURL = envURL
diff --git a/scripts/mock b/scripts/mock
deleted file mode 100755
index 0b28f6e..0000000
--- a/scripts/mock
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-
-cd "$(dirname "$0")/.."
-
-if [[ -n "$1" && "$1" != '--'* ]]; then
-  URL="$1"
-  shift
-else
-  URL="$(grep 'openapi_spec_url' .stats.yml | cut -d' ' -f2)"
-fi
-
-# Check if the URL is empty
-if [ -z "$URL" ]; then
-  echo "Error: No OpenAPI spec path/url provided or found in .stats.yml"
-  exit 1
-fi
-
-echo "==> Starting mock server with URL ${URL}"
-
-# Run prism mock on the given spec
-if [ "$1" == "--daemon" ]; then
-  npm exec --package=@stainless-api/prism-cli@5.15.0 -- prism mock "$URL" &> .prism.log &
-
-  # Wait for server to come online
-  echo -n "Waiting for server"
-  while ! grep -q "✖  fatal\|Prism is listening" ".prism.log" ; do
-    echo -n "."
-    sleep 0.1
-  done
-
-  if grep -q "✖  fatal" ".prism.log"; then
-    cat .prism.log
-    exit 1
-  fi
-
-  echo
-else
-  npm exec --package=@stainless-api/prism-cli@5.15.0 -- prism mock "$URL"
-fi
diff --git a/scripts/test b/scripts/test
index c26b122..8704b64 100755
--- a/scripts/test
+++ b/scripts/test
@@ -4,53 +4,7 @@ set -e
 
 cd "$(dirname "$0")/.."
 
-RED='\033[0;31m'
-GREEN='\033[0;32m'
-YELLOW='\033[0;33m'
-NC='\033[0m' # No Color
 
-function prism_is_running() {
-  curl --silent "http://localhost:4010" >/dev/null 2>&1
-}
-
-kill_server_on_port() {
-  pids=$(lsof -t -i tcp:"$1" || echo "")
-  if [ "$pids" != "" ]; then
-    kill "$pids"
-    echo "Stopped $pids."
-  fi
-}
-
-function is_overriding_api_base_url() {
-  [ -n "$TEST_API_BASE_URL" ]
-}
-
-if ! is_overriding_api_base_url && ! prism_is_running ; then
-  # When we exit this script, make sure to kill the background mock server process
-  trap 'kill_server_on_port 4010' EXIT
-
-  # Start the dev server
-  ./scripts/mock --daemon
-fi
-
-if is_overriding_api_base_url ; then
-  echo -e "${GREEN}✔ Running tests against ${TEST_API_BASE_URL}${NC}"
-  echo
-elif ! prism_is_running ; then
-  echo -e "${RED}ERROR:${NC} The test suite will not run without a mock Prism server"
-  echo -e "running against your OpenAPI spec."
-  echo
-  echo -e "To run the server, pass in the path or url of your OpenAPI"
-  echo -e "spec to the prism command:"
-  echo
-  echo -e "  \$ ${YELLOW}npm exec --package=@stainless-api/prism-cli@5.15.0 -- prism mock path/to/your.openapi.yml${NC}"
-  echo
-
-  exit 1
-else
-  echo -e "${GREEN}✔ Mock prism server is running with your OpenAPI spec${NC}"
-  echo
-fi
 
 echo "==> Running tests"
 go test ./... "$@"
diff --git a/scripts/utils/upload-artifact.sh b/scripts/utils/upload-artifact.sh
new file mode 100755
index 0000000..cf87460
--- /dev/null
+++ b/scripts/utils/upload-artifact.sh
@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+set -exuo pipefail
+
+DIST_DIR="dist"
+FILENAME="source.zip"
+
+mapfile -d '' files < <(
+  find . -type f \
+    \( -name '*.go' -o -name 'go.mod' -o -name 'go.sum' \) \
+    ! -path "./${DIST_DIR}/*" \
+    -print0
+)
+
+if [[ ${#files[@]} -eq 0 ]]; then
+  echo -e "\033[31mNo Go source files found for packaging.\033[0m"
+  exit 1
+fi
+
+mkdir -p "$DIST_DIR"
+rm -f "${DIST_DIR}/${FILENAME}"
+
+relative_files=()
+for file in "${files[@]}"; do
+  relative_files+=("${file#./}")
+done
+
+zip "${DIST_DIR}/${FILENAME}" "${relative_files[@]}"
+
+RESPONSE=$(curl -X POST "$URL?filename=$FILENAME" \
+  -H "Authorization: Bearer $AUTH" \
+  -H "Content-Type: application/json")
+
+SIGNED_URL=$(echo "$RESPONSE" | jq -r '.url')
+
+if [[ "$SIGNED_URL" == "null" ]]; then
+  echo -e "\033[31mFailed to get signed URL.\033[0m"
+  exit 1
+fi
+
+UPLOAD_RESPONSE=$(curl -v -X PUT \
+  -H "Content-Type: application/zip" \
+  --data-binary "@${DIST_DIR}/${FILENAME}" "$SIGNED_URL" 2>&1)
+
+if echo "$UPLOAD_RESPONSE" | grep -q "HTTP/[0-9.]* 200"; then
+  echo -e "\033[32mUploaded build to Stainless storage.\033[0m"
+  echo -e "\033[32mInstallation: Download and unzip: 'https://pkg.stainless.com/s/imagekit-go/$SHA'. Run 'go mod edit -replace github.com/imagekit-developer/imagekit-go/v2=/path/to/unzipped_directory'.\033[0m"
+else
+  echo -e "\033[31mFailed to upload artifact.\033[0m"
+  exit 1
+fi
diff --git a/shared/shared.go b/shared/shared.go
index 1d00baa..c6270b9 100644
--- a/shared/shared.go
+++ b/shared/shared.go
@@ -155,7 +155,7 @@ func (r ExtensionConfigUnion) ToParam() ExtensionConfigUnionParam {
 
 type ExtensionConfigRemoveBg struct {
 	// Specifies the background removal extension.
-	Name    constant.RemoveBg              `json:"name,required"`
+	Name    constant.RemoveBg              `json:"name" api:"required"`
 	Options ExtensionConfigRemoveBgOptions `json:"options"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
@@ -205,13 +205,13 @@ func (r *ExtensionConfigRemoveBgOptions) UnmarshalJSON(data []byte) error {
 
 type ExtensionConfigAutoTagging struct {
 	// Maximum number of tags to attach to the asset.
-	MaxTags int64 `json:"maxTags,required"`
+	MaxTags int64 `json:"maxTags" api:"required"`
 	// Minimum confidence level for tags to be considered valid.
-	MinConfidence int64 `json:"minConfidence,required"`
+	MinConfidence int64 `json:"minConfidence" api:"required"`
 	// Specifies the auto-tagging extension used.
 	//
 	// Any of "google-auto-tagging", "aws-auto-tagging".
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		MaxTags       respjson.Field
@@ -230,7 +230,7 @@ func (r *ExtensionConfigAutoTagging) UnmarshalJSON(data []byte) error {
 
 type ExtensionConfigAIAutoDescription struct {
 	// Specifies the auto description extension.
-	Name constant.AIAutoDescription `json:"name,required"`
+	Name constant.AIAutoDescription `json:"name" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Name        respjson.Field
@@ -247,9 +247,9 @@ func (r *ExtensionConfigAIAutoDescription) UnmarshalJSON(data []byte) error {
 
 type ExtensionConfigAITasks struct {
 	// Specifies the AI tasks extension for automated image analysis using AI models.
-	Name constant.AITasks `json:"name,required"`
+	Name constant.AITasks `json:"name" api:"required"`
 	// Array of task objects defining AI operations to perform on the asset.
-	Tasks []ExtensionConfigAITasksTaskUnion `json:"tasks,required"`
+	Tasks []ExtensionConfigAITasksTaskUnion `json:"tasks" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Name        respjson.Field
@@ -383,9 +383,9 @@ func (r *ExtensionConfigAITasksTaskUnionVocabulary) UnmarshalJSON(data []byte) e
 
 type ExtensionConfigAITasksTaskSelectTags struct {
 	// The question or instruction for the AI to analyze the image.
-	Instruction string `json:"instruction,required"`
+	Instruction string `json:"instruction" api:"required"`
 	// Task type that analyzes the image and adds matching tags from a vocabulary.
-	Type constant.SelectTags `json:"type,required"`
+	Type constant.SelectTags `json:"type" api:"required"`
 	// Maximum number of tags to select from the vocabulary.
 	MaxSelections int64 `json:"max_selections"`
 	// Minimum number of tags to select from the vocabulary.
@@ -415,12 +415,12 @@ func (ExtensionConfigAITasksTaskSelectTags) implExtensionConfigAITasksTaskUnion(
 
 type ExtensionConfigAITasksTaskSelectMetadata struct {
 	// Name of the custom metadata field to set. The field must exist in your account.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// The question or instruction for the AI to analyze the image.
-	Instruction string `json:"instruction,required"`
+	Instruction string `json:"instruction" api:"required"`
 	// Task type that analyzes the image and sets a custom metadata field value from a
 	// vocabulary.
-	Type constant.SelectMetadata `json:"type,required"`
+	Type constant.SelectMetadata `json:"type" api:"required"`
 	// Maximum number of values to select from the vocabulary.
 	MaxSelections int64 `json:"max_selections"`
 	// Minimum number of values to select from the vocabulary.
@@ -494,9 +494,9 @@ func (r *ExtensionConfigAITasksTaskSelectMetadataVocabularyUnion) UnmarshalJSON(
 
 type ExtensionConfigAITasksTaskYesNo struct {
 	// The yes/no question for the AI to answer about the image.
-	Instruction string `json:"instruction,required"`
+	Instruction string `json:"instruction" api:"required"`
 	// Task type that asks a yes/no question and executes actions based on the answer.
-	Type constant.YesNo `json:"type,required"`
+	Type constant.YesNo `json:"type" api:"required"`
 	// Actions to execute if the AI answers no.
 	OnNo ExtensionConfigAITasksTaskYesNoOnNo `json:"on_no"`
 	// Actions to execute if the AI cannot determine the answer.
@@ -552,10 +552,10 @@ func (r *ExtensionConfigAITasksTaskYesNoOnNo) UnmarshalJSON(data []byte) error {
 
 type ExtensionConfigAITasksTaskYesNoOnNoSetMetadata struct {
 	// Name of the custom metadata field to set.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// Value to set for the custom metadata field. The value type should match the
 	// custom metadata field type.
-	Value ExtensionConfigAITasksTaskYesNoOnNoSetMetadataValueUnion `json:"value,required"`
+	Value ExtensionConfigAITasksTaskYesNoOnNoSetMetadataValueUnion `json:"value" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Field       respjson.Field
@@ -674,7 +674,7 @@ func (r *ExtensionConfigAITasksTaskYesNoOnNoSetMetadataValueMixedItemUnion) Unma
 
 type ExtensionConfigAITasksTaskYesNoOnNoUnsetMetadata struct {
 	// Name of the custom metadata field to remove.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Field       respjson.Field
@@ -718,10 +718,10 @@ func (r *ExtensionConfigAITasksTaskYesNoOnUnknown) UnmarshalJSON(data []byte) er
 
 type ExtensionConfigAITasksTaskYesNoOnUnknownSetMetadata struct {
 	// Name of the custom metadata field to set.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// Value to set for the custom metadata field. The value type should match the
 	// custom metadata field type.
-	Value ExtensionConfigAITasksTaskYesNoOnUnknownSetMetadataValueUnion `json:"value,required"`
+	Value ExtensionConfigAITasksTaskYesNoOnUnknownSetMetadataValueUnion `json:"value" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Field       respjson.Field
@@ -842,7 +842,7 @@ func (r *ExtensionConfigAITasksTaskYesNoOnUnknownSetMetadataValueMixedItemUnion)
 
 type ExtensionConfigAITasksTaskYesNoOnUnknownUnsetMetadata struct {
 	// Name of the custom metadata field to remove.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Field       respjson.Field
@@ -886,10 +886,10 @@ func (r *ExtensionConfigAITasksTaskYesNoOnYes) UnmarshalJSON(data []byte) error
 
 type ExtensionConfigAITasksTaskYesNoOnYesSetMetadata struct {
 	// Name of the custom metadata field to set.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// Value to set for the custom metadata field. The value type should match the
 	// custom metadata field type.
-	Value ExtensionConfigAITasksTaskYesNoOnYesSetMetadataValueUnion `json:"value,required"`
+	Value ExtensionConfigAITasksTaskYesNoOnYesSetMetadataValueUnion `json:"value" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Field       respjson.Field
@@ -1010,7 +1010,7 @@ func (r *ExtensionConfigAITasksTaskYesNoOnYesSetMetadataValueMixedItemUnion) Unm
 
 type ExtensionConfigAITasksTaskYesNoOnYesUnsetMetadata struct {
 	// Name of the custom metadata field to remove.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Field       respjson.Field
@@ -1133,7 +1133,7 @@ type ExtensionConfigRemoveBgParam struct {
 	// Specifies the background removal extension.
 	//
 	// This field can be elided, and will marshal its zero value as "remove-bg".
-	Name constant.RemoveBg `json:"name,required"`
+	Name constant.RemoveBg `json:"name" api:"required"`
 	paramObj
 }
 
@@ -1173,13 +1173,13 @@ func (r *ExtensionConfigRemoveBgOptionsParam) UnmarshalJSON(data []byte) error {
 // The properties MaxTags, MinConfidence, Name are required.
 type ExtensionConfigAutoTaggingParam struct {
 	// Maximum number of tags to attach to the asset.
-	MaxTags int64 `json:"maxTags,required"`
+	MaxTags int64 `json:"maxTags" api:"required"`
 	// Minimum confidence level for tags to be considered valid.
-	MinConfidence int64 `json:"minConfidence,required"`
+	MinConfidence int64 `json:"minConfidence" api:"required"`
 	// Specifies the auto-tagging extension used.
 	//
 	// Any of "google-auto-tagging", "aws-auto-tagging".
-	Name string `json:"name,omitzero,required"`
+	Name string `json:"name,omitzero" api:"required"`
 	paramObj
 }
 
@@ -1207,7 +1207,7 @@ func NewExtensionConfigAIAutoDescriptionParam() ExtensionConfigAIAutoDescription
 // [NewExtensionConfigAIAutoDescriptionParam].
 type ExtensionConfigAIAutoDescriptionParam struct {
 	// Specifies the auto description extension.
-	Name constant.AIAutoDescription `json:"name,required"`
+	Name constant.AIAutoDescription `json:"name" api:"required"`
 	paramObj
 }
 
@@ -1222,11 +1222,11 @@ func (r *ExtensionConfigAIAutoDescriptionParam) UnmarshalJSON(data []byte) error
 // The properties Name, Tasks are required.
 type ExtensionConfigAITasksParam struct {
 	// Array of task objects defining AI operations to perform on the asset.
-	Tasks []ExtensionConfigAITasksTaskUnionParam `json:"tasks,omitzero,required"`
+	Tasks []ExtensionConfigAITasksTaskUnionParam `json:"tasks,omitzero" api:"required"`
 	// Specifies the AI tasks extension for automated image analysis using AI models.
 	//
 	// This field can be elided, and will marshal its zero value as "ai-tasks".
-	Name constant.AITasks `json:"name,required"`
+	Name constant.AITasks `json:"name" api:"required"`
 	paramObj
 }
 
@@ -1380,7 +1380,7 @@ func init() {
 // The properties Instruction, Type are required.
 type ExtensionConfigAITasksTaskSelectTagsParam struct {
 	// The question or instruction for the AI to analyze the image.
-	Instruction string `json:"instruction,required"`
+	Instruction string `json:"instruction" api:"required"`
 	// Maximum number of tags to select from the vocabulary.
 	MaxSelections param.Opt[int64] `json:"max_selections,omitzero"`
 	// Minimum number of tags to select from the vocabulary.
@@ -1391,7 +1391,7 @@ type ExtensionConfigAITasksTaskSelectTagsParam struct {
 	// Task type that analyzes the image and adds matching tags from a vocabulary.
 	//
 	// This field can be elided, and will marshal its zero value as "select_tags".
-	Type constant.SelectTags `json:"type,required"`
+	Type constant.SelectTags `json:"type" api:"required"`
 	paramObj
 }
 
@@ -1406,9 +1406,9 @@ func (r *ExtensionConfigAITasksTaskSelectTagsParam) UnmarshalJSON(data []byte) e
 // The properties Field, Instruction, Type are required.
 type ExtensionConfigAITasksTaskSelectMetadataParam struct {
 	// Name of the custom metadata field to set. The field must exist in your account.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// The question or instruction for the AI to analyze the image.
-	Instruction string `json:"instruction,required"`
+	Instruction string `json:"instruction" api:"required"`
 	// Maximum number of values to select from the vocabulary.
 	MaxSelections param.Opt[int64] `json:"max_selections,omitzero"`
 	// Minimum number of values to select from the vocabulary.
@@ -1419,7 +1419,7 @@ type ExtensionConfigAITasksTaskSelectMetadataParam struct {
 	// vocabulary.
 	//
 	// This field can be elided, and will marshal its zero value as "select_metadata".
-	Type constant.SelectMetadata `json:"type,required"`
+	Type constant.SelectMetadata `json:"type" api:"required"`
 	paramObj
 }
 
@@ -1462,7 +1462,7 @@ func (u *ExtensionConfigAITasksTaskSelectMetadataVocabularyUnionParam) asAny() a
 // The properties Instruction, Type are required.
 type ExtensionConfigAITasksTaskYesNoParam struct {
 	// The yes/no question for the AI to answer about the image.
-	Instruction string `json:"instruction,required"`
+	Instruction string `json:"instruction" api:"required"`
 	// Actions to execute if the AI answers no.
 	OnNo ExtensionConfigAITasksTaskYesNoOnNoParam `json:"on_no,omitzero"`
 	// Actions to execute if the AI cannot determine the answer.
@@ -1472,7 +1472,7 @@ type ExtensionConfigAITasksTaskYesNoParam struct {
 	// Task type that asks a yes/no question and executes actions based on the answer.
 	//
 	// This field can be elided, and will marshal its zero value as "yes_no".
-	Type constant.YesNo `json:"type,required"`
+	Type constant.YesNo `json:"type" api:"required"`
 	paramObj
 }
 
@@ -1508,10 +1508,10 @@ func (r *ExtensionConfigAITasksTaskYesNoOnNoParam) UnmarshalJSON(data []byte) er
 // The properties Field, Value are required.
 type ExtensionConfigAITasksTaskYesNoOnNoSetMetadataParam struct {
 	// Name of the custom metadata field to set.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// Value to set for the custom metadata field. The value type should match the
 	// custom metadata field type.
-	Value ExtensionConfigAITasksTaskYesNoOnNoSetMetadataValueUnionParam `json:"value,omitzero,required"`
+	Value ExtensionConfigAITasksTaskYesNoOnNoSetMetadataValueUnionParam `json:"value,omitzero" api:"required"`
 	paramObj
 }
 
@@ -1585,7 +1585,7 @@ func (u *ExtensionConfigAITasksTaskYesNoOnNoSetMetadataValueMixedItemUnionParam)
 // The property Field is required.
 type ExtensionConfigAITasksTaskYesNoOnNoUnsetMetadataParam struct {
 	// Name of the custom metadata field to remove.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	paramObj
 }
 
@@ -1621,10 +1621,10 @@ func (r *ExtensionConfigAITasksTaskYesNoOnUnknownParam) UnmarshalJSON(data []byt
 // The properties Field, Value are required.
 type ExtensionConfigAITasksTaskYesNoOnUnknownSetMetadataParam struct {
 	// Name of the custom metadata field to set.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// Value to set for the custom metadata field. The value type should match the
 	// custom metadata field type.
-	Value ExtensionConfigAITasksTaskYesNoOnUnknownSetMetadataValueUnionParam `json:"value,omitzero,required"`
+	Value ExtensionConfigAITasksTaskYesNoOnUnknownSetMetadataValueUnionParam `json:"value,omitzero" api:"required"`
 	paramObj
 }
 
@@ -1698,7 +1698,7 @@ func (u *ExtensionConfigAITasksTaskYesNoOnUnknownSetMetadataValueMixedItemUnionP
 // The property Field is required.
 type ExtensionConfigAITasksTaskYesNoOnUnknownUnsetMetadataParam struct {
 	// Name of the custom metadata field to remove.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	paramObj
 }
 
@@ -1734,10 +1734,10 @@ func (r *ExtensionConfigAITasksTaskYesNoOnYesParam) UnmarshalJSON(data []byte) e
 // The properties Field, Value are required.
 type ExtensionConfigAITasksTaskYesNoOnYesSetMetadataParam struct {
 	// Name of the custom metadata field to set.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// Value to set for the custom metadata field. The value type should match the
 	// custom metadata field type.
-	Value ExtensionConfigAITasksTaskYesNoOnYesSetMetadataValueUnionParam `json:"value,omitzero,required"`
+	Value ExtensionConfigAITasksTaskYesNoOnYesSetMetadataValueUnionParam `json:"value,omitzero" api:"required"`
 	paramObj
 }
 
@@ -1811,7 +1811,7 @@ func (u *ExtensionConfigAITasksTaskYesNoOnYesSetMetadataValueMixedItemUnionParam
 // The property Field is required.
 type ExtensionConfigAITasksTaskYesNoOnYesUnsetMetadataParam struct {
 	// Name of the custom metadata field to remove.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	paramObj
 }
 
@@ -1937,7 +1937,7 @@ type ExtensionRemoveBgParam struct {
 	// Specifies the background removal extension.
 	//
 	// This field can be elided, and will marshal its zero value as "remove-bg".
-	Name constant.RemoveBg `json:"name,required"`
+	Name constant.RemoveBg `json:"name" api:"required"`
 	paramObj
 }
 
@@ -1977,13 +1977,13 @@ func (r *ExtensionRemoveBgOptionsParam) UnmarshalJSON(data []byte) error {
 // The properties MaxTags, MinConfidence, Name are required.
 type ExtensionAutoTaggingParam struct {
 	// Maximum number of tags to attach to the asset.
-	MaxTags int64 `json:"maxTags,required"`
+	MaxTags int64 `json:"maxTags" api:"required"`
 	// Minimum confidence level for tags to be considered valid.
-	MinConfidence int64 `json:"minConfidence,required"`
+	MinConfidence int64 `json:"minConfidence" api:"required"`
 	// Specifies the auto-tagging extension used.
 	//
 	// Any of "google-auto-tagging", "aws-auto-tagging".
-	Name string `json:"name,omitzero,required"`
+	Name string `json:"name,omitzero" api:"required"`
 	paramObj
 }
 
@@ -2011,7 +2011,7 @@ func NewExtensionAIAutoDescriptionParam() ExtensionAIAutoDescriptionParam {
 // [NewExtensionAIAutoDescriptionParam].
 type ExtensionAIAutoDescriptionParam struct {
 	// Specifies the auto description extension.
-	Name constant.AIAutoDescription `json:"name,required"`
+	Name constant.AIAutoDescription `json:"name" api:"required"`
 	paramObj
 }
 
@@ -2026,11 +2026,11 @@ func (r *ExtensionAIAutoDescriptionParam) UnmarshalJSON(data []byte) error {
 // The properties Name, Tasks are required.
 type ExtensionAITasksParam struct {
 	// Array of task objects defining AI operations to perform on the asset.
-	Tasks []ExtensionAITasksTaskUnionParam `json:"tasks,omitzero,required"`
+	Tasks []ExtensionAITasksTaskUnionParam `json:"tasks,omitzero" api:"required"`
 	// Specifies the AI tasks extension for automated image analysis using AI models.
 	//
 	// This field can be elided, and will marshal its zero value as "ai-tasks".
-	Name constant.AITasks `json:"name,required"`
+	Name constant.AITasks `json:"name" api:"required"`
 	paramObj
 }
 
@@ -2184,7 +2184,7 @@ func init() {
 // The properties Instruction, Type are required.
 type ExtensionAITasksTaskSelectTagsParam struct {
 	// The question or instruction for the AI to analyze the image.
-	Instruction string `json:"instruction,required"`
+	Instruction string `json:"instruction" api:"required"`
 	// Maximum number of tags to select from the vocabulary.
 	MaxSelections param.Opt[int64] `json:"max_selections,omitzero"`
 	// Minimum number of tags to select from the vocabulary.
@@ -2195,7 +2195,7 @@ type ExtensionAITasksTaskSelectTagsParam struct {
 	// Task type that analyzes the image and adds matching tags from a vocabulary.
 	//
 	// This field can be elided, and will marshal its zero value as "select_tags".
-	Type constant.SelectTags `json:"type,required"`
+	Type constant.SelectTags `json:"type" api:"required"`
 	paramObj
 }
 
@@ -2210,9 +2210,9 @@ func (r *ExtensionAITasksTaskSelectTagsParam) UnmarshalJSON(data []byte) error {
 // The properties Field, Instruction, Type are required.
 type ExtensionAITasksTaskSelectMetadataParam struct {
 	// Name of the custom metadata field to set. The field must exist in your account.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// The question or instruction for the AI to analyze the image.
-	Instruction string `json:"instruction,required"`
+	Instruction string `json:"instruction" api:"required"`
 	// Maximum number of values to select from the vocabulary.
 	MaxSelections param.Opt[int64] `json:"max_selections,omitzero"`
 	// Minimum number of values to select from the vocabulary.
@@ -2223,7 +2223,7 @@ type ExtensionAITasksTaskSelectMetadataParam struct {
 	// vocabulary.
 	//
 	// This field can be elided, and will marshal its zero value as "select_metadata".
-	Type constant.SelectMetadata `json:"type,required"`
+	Type constant.SelectMetadata `json:"type" api:"required"`
 	paramObj
 }
 
@@ -2266,7 +2266,7 @@ func (u *ExtensionAITasksTaskSelectMetadataVocabularyUnionParam) asAny() any {
 // The properties Instruction, Type are required.
 type ExtensionAITasksTaskYesNoParam struct {
 	// The yes/no question for the AI to answer about the image.
-	Instruction string `json:"instruction,required"`
+	Instruction string `json:"instruction" api:"required"`
 	// Actions to execute if the AI answers no.
 	OnNo ExtensionAITasksTaskYesNoOnNoParam `json:"on_no,omitzero"`
 	// Actions to execute if the AI cannot determine the answer.
@@ -2276,7 +2276,7 @@ type ExtensionAITasksTaskYesNoParam struct {
 	// Task type that asks a yes/no question and executes actions based on the answer.
 	//
 	// This field can be elided, and will marshal its zero value as "yes_no".
-	Type constant.YesNo `json:"type,required"`
+	Type constant.YesNo `json:"type" api:"required"`
 	paramObj
 }
 
@@ -2312,10 +2312,10 @@ func (r *ExtensionAITasksTaskYesNoOnNoParam) UnmarshalJSON(data []byte) error {
 // The properties Field, Value are required.
 type ExtensionAITasksTaskYesNoOnNoSetMetadataParam struct {
 	// Name of the custom metadata field to set.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// Value to set for the custom metadata field. The value type should match the
 	// custom metadata field type.
-	Value ExtensionAITasksTaskYesNoOnNoSetMetadataValueUnionParam `json:"value,omitzero,required"`
+	Value ExtensionAITasksTaskYesNoOnNoSetMetadataValueUnionParam `json:"value,omitzero" api:"required"`
 	paramObj
 }
 
@@ -2389,7 +2389,7 @@ func (u *ExtensionAITasksTaskYesNoOnNoSetMetadataValueMixedItemUnionParam) asAny
 // The property Field is required.
 type ExtensionAITasksTaskYesNoOnNoUnsetMetadataParam struct {
 	// Name of the custom metadata field to remove.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	paramObj
 }
 
@@ -2425,10 +2425,10 @@ func (r *ExtensionAITasksTaskYesNoOnUnknownParam) UnmarshalJSON(data []byte) err
 // The properties Field, Value are required.
 type ExtensionAITasksTaskYesNoOnUnknownSetMetadataParam struct {
 	// Name of the custom metadata field to set.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// Value to set for the custom metadata field. The value type should match the
 	// custom metadata field type.
-	Value ExtensionAITasksTaskYesNoOnUnknownSetMetadataValueUnionParam `json:"value,omitzero,required"`
+	Value ExtensionAITasksTaskYesNoOnUnknownSetMetadataValueUnionParam `json:"value,omitzero" api:"required"`
 	paramObj
 }
 
@@ -2502,7 +2502,7 @@ func (u *ExtensionAITasksTaskYesNoOnUnknownSetMetadataValueMixedItemUnionParam)
 // The property Field is required.
 type ExtensionAITasksTaskYesNoOnUnknownUnsetMetadataParam struct {
 	// Name of the custom metadata field to remove.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	paramObj
 }
 
@@ -2538,10 +2538,10 @@ func (r *ExtensionAITasksTaskYesNoOnYesParam) UnmarshalJSON(data []byte) error {
 // The properties Field, Value are required.
 type ExtensionAITasksTaskYesNoOnYesSetMetadataParam struct {
 	// Name of the custom metadata field to set.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	// Value to set for the custom metadata field. The value type should match the
 	// custom metadata field type.
-	Value ExtensionAITasksTaskYesNoOnYesSetMetadataValueUnionParam `json:"value,omitzero,required"`
+	Value ExtensionAITasksTaskYesNoOnYesSetMetadataValueUnionParam `json:"value,omitzero" api:"required"`
 	paramObj
 }
 
@@ -2615,7 +2615,7 @@ func (u *ExtensionAITasksTaskYesNoOnYesSetMetadataValueMixedItemUnionParam) asAn
 // The property Field is required.
 type ExtensionAITasksTaskYesNoOnYesUnsetMetadataParam struct {
 	// Name of the custom metadata field to remove.
-	Field string `json:"field,required"`
+	Field string `json:"field" api:"required"`
 	paramObj
 }
 
@@ -2630,11 +2630,11 @@ func (r *ExtensionAITasksTaskYesNoOnYesUnsetMetadataParam) UnmarshalJSON(data []
 // The properties ID, Name are required.
 type ExtensionSavedExtensionParam struct {
 	// The unique ID of the saved extension to apply.
-	ID string `json:"id,required"`
+	ID string `json:"id" api:"required"`
 	// Indicates this is a reference to a saved extension.
 	//
 	// This field can be elided, and will marshal its zero value as "saved-extension".
-	Name constant.SavedExtension `json:"name,required"`
+	Name constant.SavedExtension `json:"name" api:"required"`
 	paramObj
 }
 
@@ -2692,8 +2692,8 @@ func (r GetImageAttributesOptionsParam) MarshalJSON() (data []byte, err error) {
 
 type ImageOverlayParam struct {
 	// Specifies the relative path to the image used as an overlay.
-	Input string         `json:"input,required"`
-	Type  constant.Image `json:"type,required"`
+	Input string         `json:"input" api:"required"`
+	Type  constant.Image `json:"type" api:"required"`
 	// The input path can be included in the layer as either `i-{input}` or
 	// `ie-{base64_encoded_input}`. By default, the SDK determines the appropriate
 	// format automatically. To always use base64 encoding (`ie-{base64}`), set this
@@ -3148,7 +3148,7 @@ func (u *OverlayTimingStartUnionParam) asAny() any {
 // The property Src is required.
 type ResponsiveImageAttributesParam struct {
 	// URL for the _largest_ candidate (assigned to plain `src`).
-	Src string `json:"src,required" format:"uri"`
+	Src string `json:"src" api:"required" format:"uri"`
 	// `sizes` returned (or synthesised as `100vw`). The value for the HTML `sizes`
 	// attribute.
 	Sizes param.Opt[string] `json:"sizes,omitzero"`
@@ -3242,8 +3242,8 @@ type SolidColorOverlayParam struct {
 	// code (e.g., `FFAABB50`), or a color name (e.g., `red`). If an 8-character value
 	// is provided, the last two characters represent the opacity level (from `00` for
 	// 0.00 to `99` for 0.99).
-	Color string              `json:"color,required"`
-	Type  constant.SolidColor `json:"type,required"`
+	Color string              `json:"color" api:"required"`
+	Type  constant.SolidColor `json:"type" api:"required"`
 	// Control width and height of the solid color overlay. Supported transformations
 	// depend on the base/parent asset. See overlays on
 	// [Images](https://imagekit.io/docs/add-overlays-on-images#apply-transformation-on-solid-color-overlay)
@@ -3420,10 +3420,10 @@ type SrcOptionsParam struct {
 	// Accepts a relative or absolute path of the resource. If a relative path is
 	// provided, it is appended to the `urlEndpoint`. If an absolute path is provided,
 	// `urlEndpoint` is ignored.
-	Src string `json:"src,required"`
+	Src string `json:"src" api:"required"`
 	// Get your urlEndpoint from the
 	// [ImageKit dashboard](https://imagekit.io/dashboard/url-endpoints).
-	URLEndpoint string `json:"urlEndpoint,required" format:"uri"`
+	URLEndpoint string `json:"urlEndpoint" api:"required" format:"uri"`
 	// When you want the signed URL to expire, specified in seconds. If `expiresIn` is
 	// anything above 0, the URL will always be signed even if `signed` is set to
 	// false. If not specified and `signed` is `true`, the signed URL will not expire
@@ -3484,8 +3484,8 @@ const (
 
 type SubtitleOverlayParam struct {
 	// Specifies the relative path to the subtitle file used as an overlay.
-	Input string            `json:"input,required"`
-	Type  constant.Subtitle `json:"type,required"`
+	Input string            `json:"input" api:"required"`
+	Type  constant.Subtitle `json:"type" api:"required"`
 	// The input path can be included in the layer as either `i-{input}` or
 	// `ie-{base64_encoded_input}`. By default, the SDK determines the appropriate
 	// format automatically. To always use base64 encoding (`ie-{base64}`), set this
@@ -3584,8 +3584,8 @@ const (
 type TextOverlayParam struct {
 	// Specifies the text to be displayed in the overlay. The SDK automatically handles
 	// special characters and encoding.
-	Text string        `json:"text,required"`
-	Type constant.Text `json:"type,required"`
+	Text string        `json:"text" api:"required"`
+	Type constant.Text `json:"type" api:"required"`
 	// Text can be included in the layer as either `i-{input}` (plain text) or
 	// `ie-{base64_encoded_input}` (base64). By default, the SDK selects the
 	// appropriate format based on the input text. To always use base64
@@ -3926,13 +3926,6 @@ type TransformationParam struct {
 	//     downwards (negative values). See
 	//     [Distort effect](https://imagekit.io/docs/effects-and-enhancements#distort---e-distort).
 	Distort param.Opt[string] `json:"distort,omitzero"`
-	// Accepts values between 0.1 and 5, or `auto` for automatic device pixel ratio
-	// (DPR) calculation. Also accepts arithmetic expressions.
-	//
-	//   - Learn about
-	//     [Arithmetic expressions](https://imagekit.io/docs/arithmetic-expressions-in-transformations).
-	//   - See [DPR](https://imagekit.io/docs/image-resize-and-crop#dpr---dpr).
-	Dpr param.Opt[float64] `json:"dpr,omitzero"`
 	// Refines padding and cropping behavior for pad resize, maintain ratio, and
 	// extract crop modes. Supports manual positions and coordinate-based focus. With
 	// AI-based cropping, you can automatically keep key subjects in frame—such as
@@ -4041,6 +4034,13 @@ type TransformationParam struct {
 	//
 	// Any of "pad_resize", "extract", "pad_extract".
 	CropMode TransformationCropMode `json:"cropMode,omitzero"`
+	// Accepts values between 0.1 and 5, or `auto` for automatic device pixel ratio
+	// (DPR) calculation. Also accepts arithmetic expressions.
+	//
+	//   - Learn about
+	//     [Arithmetic expressions](https://imagekit.io/docs/arithmetic-expressions-in-transformations).
+	//   - See [DPR](https://imagekit.io/docs/image-resize-and-crop#dpr---dpr).
+	Dpr TransformationDprUnionParam `json:"dpr,omitzero"`
 	// Specifies the duration (in seconds) for trimming videos, e.g., `5` or `10.5`.
 	// Typically used with startOffset to indicate the length from the start offset.
 	// Arithmetic expressions are supported. See
@@ -4282,6 +4282,31 @@ const (
 	TransformationCropModePadExtract TransformationCropMode = "pad_extract"
 )
 
+// Only one field can be non-zero.
+//
+// Use [param.IsOmitted] to confirm if a field is set.
+type TransformationDprUnionParam struct {
+	OfFloat  param.Opt[float64] `json:",omitzero,inline"`
+	OfString param.Opt[string]  `json:",omitzero,inline"`
+	paramUnion
+}
+
+func (u TransformationDprUnionParam) MarshalJSON() ([]byte, error) {
+	return param.MarshalUnion(u, u.OfFloat, u.OfString)
+}
+func (u *TransformationDprUnionParam) UnmarshalJSON(data []byte) error {
+	return apijson.UnmarshalRoot(data, u)
+}
+
+func (u *TransformationDprUnionParam) asAny() any {
+	if !param.IsOmitted(u.OfFloat) {
+		return &u.OfFloat.Value
+	} else if !param.IsOmitted(u.OfString) {
+		return &u.OfString.Value
+	}
+	return nil
+}
+
 // Only one field can be non-zero.
 //
 // Use [param.IsOmitted] to confirm if a field is set.
@@ -4805,8 +4830,8 @@ const (
 
 type VideoOverlayParam struct {
 	// Specifies the relative path to the video used as an overlay.
-	Input string         `json:"input,required"`
-	Type  constant.Video `json:"type,required"`
+	Input string         `json:"input" api:"required"`
+	Type  constant.Video `json:"type" api:"required"`
 	// The input path can be included in the layer as either `i-{input}` or
 	// `ie-{base64_encoded_input}`. By default, the SDK determines the appropriate
 	// format automatically. To always use base64 encoding (`ie-{base64}`), set this
diff --git a/usage_test.go b/usage_test.go
index 6792db9..7101623 100644
--- a/usage_test.go
+++ b/usage_test.go
@@ -27,7 +27,7 @@ func TestUsage(t *testing.T) {
 		option.WithPrivateKey("My Private Key"),
 		option.WithPassword("My Password"),
 	)
-	t.Skip("Prism tests are disabled")
+	t.Skip("Mock server tests are disabled")
 	response, err := client.Files.Upload(context.TODO(), imagekit.FileUploadParams{
 		File:     io.Reader(bytes.NewBuffer([]byte("https://www.example.com/public-url.jpg"))),
 		FileName: "file-name.jpg",
diff --git a/webhook.go b/webhook.go
index abddde8..60246ff 100644
--- a/webhook.go
+++ b/webhook.go
@@ -75,9 +75,9 @@ func (r *WebhookService) Unwrap(payload []byte, headers http.Header, opts ...opt
 
 type BaseWebhookEvent struct {
 	// Unique identifier for the event.
-	ID string `json:"id,required"`
+	ID string `json:"id" api:"required"`
 	// The type of webhook event.
-	Type string `json:"type,required"`
+	Type string `json:"type" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		ID          respjson.Field
@@ -97,10 +97,10 @@ func (r *BaseWebhookEvent) UnmarshalJSON(data []byte) error {
 // but the requested transformation could not be generated.
 type UploadPostTransformErrorEvent struct {
 	// Timestamp of when the event occurred in ISO8601 format.
-	CreatedAt time.Time                            `json:"created_at,required" format:"date-time"`
-	Data      UploadPostTransformErrorEventData    `json:"data,required"`
-	Request   UploadPostTransformErrorEventRequest `json:"request,required"`
-	Type      constant.UploadPostTransformError    `json:"type,required"`
+	CreatedAt time.Time                            `json:"created_at" api:"required" format:"date-time"`
+	Data      UploadPostTransformErrorEventData    `json:"data" api:"required"`
+	Request   UploadPostTransformErrorEventRequest `json:"request" api:"required"`
+	Type      constant.UploadPostTransformError    `json:"type" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		CreatedAt   respjson.Field
@@ -121,14 +121,14 @@ func (r *UploadPostTransformErrorEvent) UnmarshalJSON(data []byte) error {
 
 type UploadPostTransformErrorEventData struct {
 	// Unique identifier of the originally uploaded file.
-	FileID string `json:"fileId,required"`
+	FileID string `json:"fileId" api:"required"`
 	// Name of the file.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// Path of the file.
-	Path           string                                          `json:"path,required"`
-	Transformation UploadPostTransformErrorEventDataTransformation `json:"transformation,required"`
+	Path           string                                          `json:"path" api:"required"`
+	Transformation UploadPostTransformErrorEventDataTransformation `json:"transformation" api:"required"`
 	// URL of the attempted post-transformation.
-	URL string `json:"url,required" format:"uri"`
+	URL string `json:"url" api:"required" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		FileID         respjson.Field
@@ -148,7 +148,7 @@ func (r *UploadPostTransformErrorEventData) UnmarshalJSON(data []byte) error {
 }
 
 type UploadPostTransformErrorEventDataTransformation struct {
-	Error UploadPostTransformErrorEventDataTransformationError `json:"error,required"`
+	Error UploadPostTransformErrorEventDataTransformationError `json:"error" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Error       respjson.Field
@@ -165,7 +165,7 @@ func (r *UploadPostTransformErrorEventDataTransformation) UnmarshalJSON(data []b
 
 type UploadPostTransformErrorEventDataTransformationError struct {
 	// Reason for the post-transformation failure.
-	Reason string `json:"reason,required"`
+	Reason string `json:"reason" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Reason      respjson.Field
@@ -181,9 +181,9 @@ func (r *UploadPostTransformErrorEventDataTransformationError) UnmarshalJSON(dat
 }
 
 type UploadPostTransformErrorEventRequest struct {
-	Transformation UploadPostTransformErrorEventRequestTransformation `json:"transformation,required"`
+	Transformation UploadPostTransformErrorEventRequestTransformation `json:"transformation" api:"required"`
 	// Unique identifier for the originating request.
-	XRequestID string `json:"x_request_id,required"`
+	XRequestID string `json:"x_request_id" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Transformation respjson.Field
@@ -203,7 +203,7 @@ type UploadPostTransformErrorEventRequestTransformation struct {
 	// Type of the requested post-transformation.
 	//
 	// Any of "transformation", "abs", "gif-to-video", "thumbnail".
-	Type string `json:"type,required"`
+	Type string `json:"type" api:"required"`
 	// Only applicable if transformation type is 'abs'. Streaming protocol used.
 	//
 	// Any of "hls", "dash".
@@ -231,10 +231,10 @@ func (r *UploadPostTransformErrorEventRequestTransformation) UnmarshalJSON(data
 // that each post-transformation generates a separate webhook event.
 type UploadPostTransformSuccessEvent struct {
 	// Timestamp of when the event occurred in ISO8601 format.
-	CreatedAt time.Time                              `json:"created_at,required" format:"date-time"`
-	Data      UploadPostTransformSuccessEventData    `json:"data,required"`
-	Request   UploadPostTransformSuccessEventRequest `json:"request,required"`
-	Type      constant.UploadPostTransformSuccess    `json:"type,required"`
+	CreatedAt time.Time                              `json:"created_at" api:"required" format:"date-time"`
+	Data      UploadPostTransformSuccessEventData    `json:"data" api:"required"`
+	Request   UploadPostTransformSuccessEventRequest `json:"request" api:"required"`
+	Type      constant.UploadPostTransformSuccess    `json:"type" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		CreatedAt   respjson.Field
@@ -255,11 +255,11 @@ func (r *UploadPostTransformSuccessEvent) UnmarshalJSON(data []byte) error {
 
 type UploadPostTransformSuccessEventData struct {
 	// Unique identifier of the originally uploaded file.
-	FileID string `json:"fileId,required"`
+	FileID string `json:"fileId" api:"required"`
 	// Name of the file.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// URL of the generated post-transformation.
-	URL string `json:"url,required" format:"uri"`
+	URL string `json:"url" api:"required" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		FileID      respjson.Field
@@ -277,9 +277,9 @@ func (r *UploadPostTransformSuccessEventData) UnmarshalJSON(data []byte) error {
 }
 
 type UploadPostTransformSuccessEventRequest struct {
-	Transformation UploadPostTransformSuccessEventRequestTransformation `json:"transformation,required"`
+	Transformation UploadPostTransformSuccessEventRequestTransformation `json:"transformation" api:"required"`
 	// Unique identifier for the originating request.
-	XRequestID string `json:"x_request_id,required"`
+	XRequestID string `json:"x_request_id" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Transformation respjson.Field
@@ -299,7 +299,7 @@ type UploadPostTransformSuccessEventRequestTransformation struct {
 	// Type of the requested post-transformation.
 	//
 	// Any of "transformation", "abs", "gif-to-video", "thumbnail".
-	Type string `json:"type,required"`
+	Type string `json:"type" api:"required"`
 	// Only applicable if transformation type is 'abs'. Streaming protocol used.
 	//
 	// Any of "hls", "dash".
@@ -326,10 +326,10 @@ func (r *UploadPostTransformSuccessEventRequestTransformation) UnmarshalJSON(dat
 // accepted, but the requested transformation could not be applied.
 type UploadPreTransformErrorEvent struct {
 	// Timestamp of when the event occurred in ISO8601 format.
-	CreatedAt time.Time                           `json:"created_at,required" format:"date-time"`
-	Data      UploadPreTransformErrorEventData    `json:"data,required"`
-	Request   UploadPreTransformErrorEventRequest `json:"request,required"`
-	Type      constant.UploadPreTransformError    `json:"type,required"`
+	CreatedAt time.Time                           `json:"created_at" api:"required" format:"date-time"`
+	Data      UploadPreTransformErrorEventData    `json:"data" api:"required"`
+	Request   UploadPreTransformErrorEventRequest `json:"request" api:"required"`
+	Type      constant.UploadPreTransformError    `json:"type" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		CreatedAt   respjson.Field
@@ -350,10 +350,10 @@ func (r *UploadPreTransformErrorEvent) UnmarshalJSON(data []byte) error {
 
 type UploadPreTransformErrorEventData struct {
 	// Name of the file.
-	Name string `json:"name,required"`
+	Name string `json:"name" api:"required"`
 	// Path of the file.
-	Path           string                                         `json:"path,required"`
-	Transformation UploadPreTransformErrorEventDataTransformation `json:"transformation,required"`
+	Path           string                                         `json:"path" api:"required"`
+	Transformation UploadPreTransformErrorEventDataTransformation `json:"transformation" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Name           respjson.Field
@@ -371,7 +371,7 @@ func (r *UploadPreTransformErrorEventData) UnmarshalJSON(data []byte) error {
 }
 
 type UploadPreTransformErrorEventDataTransformation struct {
-	Error UploadPreTransformErrorEventDataTransformationError `json:"error,required"`
+	Error UploadPreTransformErrorEventDataTransformationError `json:"error" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Error       respjson.Field
@@ -388,7 +388,7 @@ func (r *UploadPreTransformErrorEventDataTransformation) UnmarshalJSON(data []by
 
 type UploadPreTransformErrorEventDataTransformationError struct {
 	// Reason for the pre-transformation failure.
-	Reason string `json:"reason,required"`
+	Reason string `json:"reason" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Reason      respjson.Field
@@ -405,9 +405,9 @@ func (r *UploadPreTransformErrorEventDataTransformationError) UnmarshalJSON(data
 
 type UploadPreTransformErrorEventRequest struct {
 	// The requested pre-transformation string.
-	Transformation string `json:"transformation,required"`
+	Transformation string `json:"transformation" api:"required"`
 	// Unique identifier for the originating request.
-	XRequestID string `json:"x_request_id,required"`
+	XRequestID string `json:"x_request_id" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Transformation respjson.Field
@@ -428,11 +428,11 @@ func (r *UploadPreTransformErrorEventRequest) UnmarshalJSON(data []byte) error {
 // Library.
 type UploadPreTransformSuccessEvent struct {
 	// Timestamp of when the event occurred in ISO8601 format.
-	CreatedAt time.Time `json:"created_at,required" format:"date-time"`
+	CreatedAt time.Time `json:"created_at" api:"required" format:"date-time"`
 	// Object containing details of a successful upload.
-	Data    UploadPreTransformSuccessEventData    `json:"data,required"`
-	Request UploadPreTransformSuccessEventRequest `json:"request,required"`
-	Type    constant.UploadPreTransformSuccess    `json:"type,required"`
+	Data    UploadPreTransformSuccessEventData    `json:"data" api:"required"`
+	Request UploadPreTransformSuccessEventRequest `json:"request" api:"required"`
+	Type    constant.UploadPreTransformSuccess    `json:"type" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		CreatedAt   respjson.Field
@@ -454,7 +454,7 @@ func (r *UploadPreTransformSuccessEvent) UnmarshalJSON(data []byte) error {
 // Object containing details of a successful upload.
 type UploadPreTransformSuccessEventData struct {
 	// An array of tags assigned to the uploaded file by auto tagging.
-	AITags []UploadPreTransformSuccessEventDataAITag `json:"AITags,nullable"`
+	AITags []UploadPreTransformSuccessEventDataAITag `json:"AITags" api:"nullable"`
 	// The audio codec used in the video (only for video).
 	AudioCodec string `json:"audioCodec"`
 	// The bit rate of the video in kbps (only for video).
@@ -463,7 +463,7 @@ type UploadPreTransformSuccessEventData struct {
 	// `x,y,width,height`. If `customCoordinates` are not defined, then it is `null`.
 	// Send `customCoordinates` in `responseFields` in API request to get the value of
 	// this field.
-	CustomCoordinates string `json:"customCoordinates,nullable"`
+	CustomCoordinates string `json:"customCoordinates" api:"nullable"`
 	// A key-value data associated with the asset. Use `responseField` in API request
 	// to get `customMetadata` in the upload API response. Before setting any custom
 	// metadata on an asset, you have to create the field using custom metadata fields
@@ -525,7 +525,7 @@ type UploadPreTransformSuccessEventData struct {
 	// The array of tags associated with the asset. If no tags are set, it will be
 	// `null`. Send `tags` in `responseFields` in API request to get the value of this
 	// field.
-	Tags []string `json:"tags,nullable"`
+	Tags []string `json:"tags" api:"nullable"`
 	// In the case of an image, a small thumbnail URL.
 	ThumbnailURL string `json:"thumbnailUrl"`
 	// A publicly accessible URL of the file.
@@ -642,7 +642,7 @@ type UploadPreTransformSuccessEventDataSelectedFieldsSchema struct {
 	//
 	// Any of "Text", "Textarea", "Number", "Date", "Boolean", "SingleSelect",
 	// "MultiSelect".
-	Type string `json:"type,required"`
+	Type string `json:"type" api:"required"`
 	// The default value for this custom metadata field. The value should match the
 	// `type` of custom metadata field.
 	DefaultValue UploadPreTransformSuccessEventDataSelectedFieldsSchemaDefaultValueUnion `json:"defaultValue"`
@@ -940,9 +940,9 @@ func (r *UploadPreTransformSuccessEventDataVersionInfo) UnmarshalJSON(data []byt
 
 type UploadPreTransformSuccessEventRequest struct {
 	// The requested pre-transformation string.
-	Transformation string `json:"transformation,required"`
+	Transformation string `json:"transformation" api:"required"`
 	// Unique identifier for the originating request.
-	XRequestID string `json:"x_request_id,required"`
+	XRequestID string `json:"x_request_id" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Transformation respjson.Field
@@ -963,11 +963,11 @@ func (r *UploadPreTransformSuccessEventRequest) UnmarshalJSON(data []byte) error
 // request. Use this for debugging and tracking transformation lifecycle.
 type VideoTransformationAcceptedEvent struct {
 	// Timestamp when the event was created in ISO8601 format.
-	CreatedAt time.Time                            `json:"created_at,required" format:"date-time"`
-	Data      VideoTransformationAcceptedEventData `json:"data,required"`
+	CreatedAt time.Time                            `json:"created_at" api:"required" format:"date-time"`
+	Data      VideoTransformationAcceptedEventData `json:"data" api:"required"`
 	// Information about the original request that triggered the video transformation.
-	Request VideoTransformationAcceptedEventRequest `json:"request,required"`
-	Type    constant.VideoTransformationAccepted    `json:"type,required"`
+	Request VideoTransformationAcceptedEventRequest `json:"request" api:"required"`
+	Type    constant.VideoTransformationAccepted    `json:"type" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		CreatedAt   respjson.Field
@@ -988,9 +988,9 @@ func (r *VideoTransformationAcceptedEvent) UnmarshalJSON(data []byte) error {
 
 type VideoTransformationAcceptedEventData struct {
 	// Information about the source video asset being transformed.
-	Asset VideoTransformationAcceptedEventDataAsset `json:"asset,required"`
+	Asset VideoTransformationAcceptedEventDataAsset `json:"asset" api:"required"`
 	// Base information about a video transformation request.
-	Transformation VideoTransformationAcceptedEventDataTransformation `json:"transformation,required"`
+	Transformation VideoTransformationAcceptedEventDataTransformation `json:"transformation" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Asset          respjson.Field
@@ -1009,7 +1009,7 @@ func (r *VideoTransformationAcceptedEventData) UnmarshalJSON(data []byte) error
 // Information about the source video asset being transformed.
 type VideoTransformationAcceptedEventDataAsset struct {
 	// URL to download or access the source video file.
-	URL string `json:"url,required" format:"uri"`
+	URL string `json:"url" api:"required" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		URL         respjson.Field
@@ -1034,7 +1034,7 @@ type VideoTransformationAcceptedEventDataTransformation struct {
 	//   - `video-thumbnail`: Generate thumbnail image from video
 	//
 	// Any of "video-transformation", "gif-to-video", "video-thumbnail".
-	Type string `json:"type,required"`
+	Type string `json:"type" api:"required"`
 	// Configuration options for video transformations.
 	Options VideoTransformationAcceptedEventDataTransformationOptions `json:"options"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -1101,9 +1101,9 @@ func (r *VideoTransformationAcceptedEventDataTransformationOptions) UnmarshalJSO
 // Information about the original request that triggered the video transformation.
 type VideoTransformationAcceptedEventRequest struct {
 	// Full URL of the transformation request that was submitted.
-	URL string `json:"url,required" format:"uri"`
+	URL string `json:"url" api:"required" format:"uri"`
 	// Unique identifier for the originating transformation request.
-	XRequestID string `json:"x_request_id,required"`
+	XRequestID string `json:"x_request_id" api:"required"`
 	// User-Agent header from the original request that triggered the transformation.
 	UserAgent string `json:"user_agent"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -1128,11 +1128,11 @@ func (r *VideoTransformationAcceptedEventRequest) UnmarshalJSON(data []byte) err
 // support.
 type VideoTransformationErrorEvent struct {
 	// Timestamp when the event was created in ISO8601 format.
-	CreatedAt time.Time                         `json:"created_at,required" format:"date-time"`
-	Data      VideoTransformationErrorEventData `json:"data,required"`
+	CreatedAt time.Time                         `json:"created_at" api:"required" format:"date-time"`
+	Data      VideoTransformationErrorEventData `json:"data" api:"required"`
 	// Information about the original request that triggered the video transformation.
-	Request VideoTransformationErrorEventRequest `json:"request,required"`
-	Type    constant.VideoTransformationError    `json:"type,required"`
+	Request VideoTransformationErrorEventRequest `json:"request" api:"required"`
+	Type    constant.VideoTransformationError    `json:"type" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		CreatedAt   respjson.Field
@@ -1153,8 +1153,8 @@ func (r *VideoTransformationErrorEvent) UnmarshalJSON(data []byte) error {
 
 type VideoTransformationErrorEventData struct {
 	// Information about the source video asset being transformed.
-	Asset          VideoTransformationErrorEventDataAsset          `json:"asset,required"`
-	Transformation VideoTransformationErrorEventDataTransformation `json:"transformation,required"`
+	Asset          VideoTransformationErrorEventDataAsset          `json:"asset" api:"required"`
+	Transformation VideoTransformationErrorEventDataTransformation `json:"transformation" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Asset          respjson.Field
@@ -1173,7 +1173,7 @@ func (r *VideoTransformationErrorEventData) UnmarshalJSON(data []byte) error {
 // Information about the source video asset being transformed.
 type VideoTransformationErrorEventDataAsset struct {
 	// URL to download or access the source video file.
-	URL string `json:"url,required" format:"uri"`
+	URL string `json:"url" api:"required" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		URL         respjson.Field
@@ -1197,7 +1197,7 @@ type VideoTransformationErrorEventDataTransformation struct {
 	//   - `video-thumbnail`: Generate thumbnail image from video
 	//
 	// Any of "video-transformation", "gif-to-video", "video-thumbnail".
-	Type string `json:"type,required"`
+	Type string `json:"type" api:"required"`
 	// Details about the transformation error.
 	Error VideoTransformationErrorEventDataTransformationError `json:"error"`
 	// Configuration options for video transformations.
@@ -1227,7 +1227,7 @@ type VideoTransformationErrorEventDataTransformationError struct {
 	// - `internal_server_error`: Unexpected server error
 	//
 	// Any of "encoding_failed", "download_failed", "internal_server_error".
-	Reason string `json:"reason,required"`
+	Reason string `json:"reason" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Reason      respjson.Field
@@ -1289,9 +1289,9 @@ func (r *VideoTransformationErrorEventDataTransformationOptions) UnmarshalJSON(d
 // Information about the original request that triggered the video transformation.
 type VideoTransformationErrorEventRequest struct {
 	// Full URL of the transformation request that was submitted.
-	URL string `json:"url,required" format:"uri"`
+	URL string `json:"url" api:"required" format:"uri"`
 	// Unique identifier for the originating transformation request.
-	XRequestID string `json:"x_request_id,required"`
+	XRequestID string `json:"x_request_id" api:"required"`
 	// User-Agent header from the original request that triggered the transformation.
 	UserAgent string `json:"user_agent"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -1316,11 +1316,11 @@ func (r *VideoTransformationErrorEventRequest) UnmarshalJSON(data []byte) error
 // transformed video to users.
 type VideoTransformationReadyEvent struct {
 	// Timestamp when the event was created in ISO8601 format.
-	CreatedAt time.Time                         `json:"created_at,required" format:"date-time"`
-	Data      VideoTransformationReadyEventData `json:"data,required"`
+	CreatedAt time.Time                         `json:"created_at" api:"required" format:"date-time"`
+	Data      VideoTransformationReadyEventData `json:"data" api:"required"`
 	// Information about the original request that triggered the video transformation.
-	Request VideoTransformationReadyEventRequest `json:"request,required"`
-	Type    constant.VideoTransformationReady    `json:"type,required"`
+	Request VideoTransformationReadyEventRequest `json:"request" api:"required"`
+	Type    constant.VideoTransformationReady    `json:"type" api:"required"`
 	// Performance metrics for the transformation process.
 	Timings VideoTransformationReadyEventTimings `json:"timings"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -1344,8 +1344,8 @@ func (r *VideoTransformationReadyEvent) UnmarshalJSON(data []byte) error {
 
 type VideoTransformationReadyEventData struct {
 	// Information about the source video asset being transformed.
-	Asset          VideoTransformationReadyEventDataAsset          `json:"asset,required"`
-	Transformation VideoTransformationReadyEventDataTransformation `json:"transformation,required"`
+	Asset          VideoTransformationReadyEventDataAsset          `json:"asset" api:"required"`
+	Transformation VideoTransformationReadyEventDataTransformation `json:"transformation" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Asset          respjson.Field
@@ -1364,7 +1364,7 @@ func (r *VideoTransformationReadyEventData) UnmarshalJSON(data []byte) error {
 // Information about the source video asset being transformed.
 type VideoTransformationReadyEventDataAsset struct {
 	// URL to download or access the source video file.
-	URL string `json:"url,required" format:"uri"`
+	URL string `json:"url" api:"required" format:"uri"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		URL         respjson.Field
@@ -1388,7 +1388,7 @@ type VideoTransformationReadyEventDataTransformation struct {
 	//   - `video-thumbnail`: Generate thumbnail image from video
 	//
 	// Any of "video-transformation", "gif-to-video", "video-thumbnail".
-	Type string `json:"type,required"`
+	Type string `json:"type" api:"required"`
 	// Configuration options for video transformations.
 	Options VideoTransformationReadyEventDataTransformationOptions `json:"options"`
 	// Information about the transformed output video.
@@ -1456,7 +1456,7 @@ func (r *VideoTransformationReadyEventDataTransformationOptions) UnmarshalJSON(d
 // Information about the transformed output video.
 type VideoTransformationReadyEventDataTransformationOutput struct {
 	// URL to access the transformed video.
-	URL string `json:"url,required" format:"uri"`
+	URL string `json:"url" api:"required" format:"uri"`
 	// Metadata of the output video file.
 	VideoMetadata VideoTransformationReadyEventDataTransformationOutputVideoMetadata `json:"video_metadata"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
@@ -1477,13 +1477,13 @@ func (r *VideoTransformationReadyEventDataTransformationOutput) UnmarshalJSON(da
 // Metadata of the output video file.
 type VideoTransformationReadyEventDataTransformationOutputVideoMetadata struct {
 	// Bitrate of the output video in bits per second.
-	Bitrate int64 `json:"bitrate,required"`
+	Bitrate int64 `json:"bitrate" api:"required"`
 	// Duration of the output video in seconds.
-	Duration float64 `json:"duration,required"`
+	Duration float64 `json:"duration" api:"required"`
 	// Height of the output video in pixels.
-	Height int64 `json:"height,required"`
+	Height int64 `json:"height" api:"required"`
 	// Width of the output video in pixels.
-	Width int64 `json:"width,required"`
+	Width int64 `json:"width" api:"required"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].
 	JSON struct {
 		Bitrate     respjson.Field
@@ -1506,9 +1506,9 @@ func (r *VideoTransformationReadyEventDataTransformationOutputVideoMetadata) Unm
 // Information about the original request that triggered the video transformation.
 type VideoTransformationReadyEventRequest struct {
 	// Full URL of the transformation request that was submitted.
-	URL string `json:"url,required" format:"uri"`
+	URL string `json:"url" api:"required" format:"uri"`
 	// Unique identifier for the originating transformation request.
-	XRequestID string `json:"x_request_id,required"`
+	XRequestID string `json:"x_request_id" api:"required"`
 	// User-Agent header from the original request that triggered the transformation.
 	UserAgent string `json:"user_agent"`
 	// JSON contains metadata for fields, check presence with [respjson.Field.Valid].