diff --git a/apps/anyspend-demo-nextjs/src/app/components/CustomDepositButton.tsx b/apps/anyspend-demo-nextjs/src/app/components/CustomDepositButton.tsx
index b4bdd8e4..895d7359 100644
--- a/apps/anyspend-demo-nextjs/src/app/components/CustomDepositButton.tsx
+++ b/apps/anyspend-demo-nextjs/src/app/components/CustomDepositButton.tsx
@@ -49,7 +49,7 @@ const STAKING_CONTRACT = "0xEf80AafFbf4cF5c8a5e1D4c61838987D5973DAab";
 type DepositType = "simple" | "contract" | "hyperliquid" | "eth-base";
 
 export function CustomDepositButton() {
-  const { address } = useAccountWallet();
+  const { address = "0x0000000000000000000000000000000000000000" } = useAccountWallet();
   const [isModalOpen, setIsModalOpen] = useState(false);
   const [depositType, setDepositType] = useState<DepositType>("simple");
 
@@ -70,7 +70,7 @@ export function CustomDepositButton() {
   const customExactInConfig = {
     functionAbi: STAKE_FOR_FUNCTION_ABI,
     functionName: "stakeFor",
-    functionArgs: [normalizeAddress(address || ""), "{{amount_out}}"],
+    functionArgs: [normalizeAddress(address), "{{amount_out}}"],
     to: STAKING_CONTRACT,
     spenderAddress: STAKING_CONTRACT,
     action: `stake USDC`,
diff --git a/apps/anyspend-demo-nextjs/src/app/components/FixedAmountDepositButton.tsx b/apps/anyspend-demo-nextjs/src/app/components/FixedAmountDepositButton.tsx
new file mode 100644
index 00000000..3b607fba
--- /dev/null
+++ b/apps/anyspend-demo-nextjs/src/app/components/FixedAmountDepositButton.tsx
@@ -0,0 +1,73 @@
+"use client";
+
+import { AnySpendDeposit } from "@b3dotfun/sdk/anyspend/react";
+import { useAccountWallet } from "@b3dotfun/sdk/global-account/react";
+import { useState } from "react";
+import { parseUnits } from "viem";
+import { base } from "viem/chains";
+
+// USDC on Base (6 decimals)
+const USDC_ADDRESS = "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913";
+
+export function FixedAmountDepositButton() {
+  const { address = "0x0000000000000000000000000000000000000000" } = useAccountWallet();
+  const [isModalOpen, setIsModalOpen] = useState(false);
+
+  const handleClose = () => setIsModalOpen(false);
+
+  const handleSuccess = (amount: string) => {
+    console.log(`Fixed amount deposit successful! Amount: ${amount}`);
+    handleClose();
+  };
+
+  // Fixed amount: 10 USDC (in wei/smallest unit)
+  const fixedAmount = parseUnits("10", 6).toString();
+
+  return (
+    <>
+      <button
+        onClick={() => setIsModalOpen(true)}
+        className="group flex h-40 w-full flex-col justify-between overflow-hidden rounded-lg border border-gray-100 bg-white p-6 text-left shadow-sm transition-all hover:border-green-100 hover:shadow-md"
+      >
+        <div>
+          <h3 className="text-lg font-medium text-gray-900">Fixed Amount Deposit</h3>
+          <p className="mt-1 text-sm text-gray-500">Deposit exactly 10 USDC with locked amount inputs</p>
+        </div>
+        <div className="flex items-center gap-2">
+          <span className="rounded-full bg-green-100 px-2 py-1 text-xs font-medium text-green-700">Fixed Amount</span>
+          <span className="rounded-full bg-blue-100 px-2 py-1 text-xs font-medium text-blue-700">10 USDC</span>
+        </div>
+      </button>
+
+      {isModalOpen && (
+        <div className="fixed inset-0 z-50 flex items-center justify-center bg-black bg-opacity-50">
+          <div className="relative w-full max-w-md overflow-y-auto overflow-x-hidden rounded-2xl bg-white shadow-xl">
+            {!address ? (
+              <div className="relative p-6">
+                <button onClick={handleClose} className="absolute right-4 top-4 text-gray-400 hover:text-gray-600">
+                  <svg className="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+                  </svg>
+                </button>
+                <div className="rounded-lg bg-yellow-50 p-4 text-center">
+                  <p className="text-yellow-800">Please sign in first to use the deposit feature.</p>
+                </div>
+              </div>
+            ) : (
+              <AnySpendDeposit
+                mode="modal"
+                recipientAddress={address}
+                destinationTokenAddress={USDC_ADDRESS}
+                destinationTokenChainId={base.id}
+                destinationTokenAmount={fixedAmount}
+                onSuccess={handleSuccess}
+                onClose={handleClose}
+                allowDirectTransfer
+              />
+            )}
+          </div>
+        </div>
+      )}
+    </>
+  );
+}
diff --git a/apps/anyspend-demo-nextjs/src/app/page.tsx b/apps/anyspend-demo-nextjs/src/app/page.tsx
index 8e2d7256..084d4ac9 100644
--- a/apps/anyspend-demo-nextjs/src/app/page.tsx
+++ b/apps/anyspend-demo-nextjs/src/app/page.tsx
@@ -8,6 +8,7 @@ import { CollectorClubPurchaseButton } from "./components/CollectorClubPurchaseB
 import { CustomClassesDepositButton } from "./components/CustomClassesDepositButton";
 import { CustomDepositButton } from "./components/CustomDepositButton";
 import { DepositHypeButton } from "./components/DepositHypeButton";
+import { FixedAmountDepositButton } from "./components/FixedAmountDepositButton";
 import { GetB3TokenButton } from "./components/GetB3TokenButton";
 import { MintNftButton } from "./components/MintNftButton";
 import { OrderDetailsButton } from "./components/OrderDetailsButton";
@@ -61,6 +62,7 @@ export default function Home() {
             <CollectorClubPurchaseButton />
             <OrderDetailsButton />
             <CustomClassesDepositButton />
+            <FixedAmountDepositButton />
           </div>
         </div>
       </div>
diff --git a/packages/sdk/src/anyspend/react/components/AnySpend.tsx b/packages/sdk/src/anyspend/react/components/AnySpend.tsx
index 1e782dfd..747af866 100644
--- a/packages/sdk/src/anyspend/react/components/AnySpend.tsx
+++ b/packages/sdk/src/anyspend/react/components/AnySpend.tsx
@@ -1215,6 +1215,7 @@ function AnySpendInner({
               onTokenSelect={onTokenSelect}
               onShowFeeDetail={() => navigateToPanel(PanelView.FEE_DETAIL, "forward")}
               skipAutoMaxOnTokenChange={!!destinationTokenAmount}
+              disableAmountInput={!!destinationTokenAmount}
             />
           ) : (
             <motion.div
diff --git a/packages/sdk/src/anyspend/react/components/AnySpendCustomExactIn.tsx b/packages/sdk/src/anyspend/react/components/AnySpendCustomExactIn.tsx
index 0359d287..5252af06 100644
--- a/packages/sdk/src/anyspend/react/components/AnySpendCustomExactIn.tsx
+++ b/packages/sdk/src/anyspend/react/components/AnySpendCustomExactIn.tsx
@@ -419,6 +419,7 @@ function AnySpendCustomExactInInner({
               anyspendQuote={anyspendQuote}
               onTokenSelect={onTokenSelect}
               skipAutoMaxOnTokenChange={!!destinationTokenAmount}
+              disableAmountInput={!!destinationTokenAmount}
             />
           ) : (
             <motion.div
diff --git a/packages/sdk/src/anyspend/react/components/common/CryptoPaySection.tsx b/packages/sdk/src/anyspend/react/components/common/CryptoPaySection.tsx
index 21da6d81..65ff58ab 100644
--- a/packages/sdk/src/anyspend/react/components/common/CryptoPaySection.tsx
+++ b/packages/sdk/src/anyspend/react/components/common/CryptoPaySection.tsx
@@ -34,6 +34,8 @@ interface CryptoPaySectionProps {
   classes?: CryptoPaySectionClasses;
   /** When true, skip auto-setting max balance when token changes (used for fixed destination amount mode) */
   skipAutoMaxOnTokenChange?: boolean;
+  /** When true, disables the source amount input and hides the MAX button (used for fixed destination amount mode) */
+  disableAmountInput?: boolean;
 }
 
 export function CryptoPaySection({
@@ -52,6 +54,7 @@ export function CryptoPaySection({
   onShowFeeDetail,
   classes,
   skipAutoMaxOnTokenChange = false,
+  disableAmountInput = false,
 }: CryptoPaySectionProps) {
   const { data: srcTokenMetadata } = useTokenData(selectedSrcToken?.chainId, selectedSrcToken?.address);
 
@@ -138,6 +141,7 @@ export function CryptoPaySection({
           setToken={setSelectedSrcToken}
           onTokenSelect={onTokenSelect}
           skipAutoMaxOnTokenChange={skipAutoMaxOnTokenChange}
+          disabled={disableAmountInput}
         />
       </div>
       <div className={classes?.balanceRow || "flex items-center justify-between"}>
@@ -154,6 +158,7 @@ export function CryptoPaySection({
             setIsSrcInputDirty(true);
             setSrcAmount(value);
           }}
+          hideMaxButton={disableAmountInput}
         />
       </div>
     </motion.div>
diff --git a/packages/sdk/src/anyspend/react/components/common/TokenBalance.tsx b/packages/sdk/src/anyspend/react/components/common/TokenBalance.tsx
index dafd80cd..c9eb7638 100644
--- a/packages/sdk/src/anyspend/react/components/common/TokenBalance.tsx
+++ b/packages/sdk/src/anyspend/react/components/common/TokenBalance.tsx
@@ -10,10 +10,12 @@ export function TokenBalance({
   token,
   walletAddress,
   onChangeInput,
+  hideMaxButton = false,
 }: {
   token: components["schemas"]["Token"];
   walletAddress: string | undefined;
   onChangeInput: (value: string) => void;
+  hideMaxButton?: boolean;
 }) {
   const tokenAddress = isNativeToken(token.address) ? "native" : token.address;
   const { data, isLoading } = useSimTokenBalance(walletAddress, tokenAddress, token.chainId);
@@ -62,7 +64,7 @@ export function TokenBalance({
             {rawBalance ? `Balance: ${formattedBalance}` : `Balance: 0`}
           </div>
 
-          {!!rawBalance && (
+          {!!rawBalance && !hideMaxButton && (
             <>
               {/* <button
                 onClick={() => handlePercentageClick(20)}