Native, Privacy-First, and 10x Lighter than Postman.
Gostman is a modern, cross-platform API client built with Wails (Go + React). It combines the performance of a native Go backend with the beautiful, reactive UI of modern web technologies. Designed for developers who value speed, privacy, and simplicity without compromising on power.
- 🚀 Multi-Protocol Support: Native support for REST, GraphQL, and WebSockets.
- ⛓️ Request Chaining: Use response data as variables in subsequent requests for complex workflows.
- 📜 Test Scripts: Automate assertions and tests with a built-in JavaScript/Chai-powered runtime.
- ⚡ Lightning Fast: Built with Go for instant startup and blazing-fast response times.
- 🎨 Beautiful UI: Modern glassmorphic design with smooth animations and dark mode.
- 🔄 Import/Export: Effortlessly migrate with support for Postman collections and OpenAPI specs.
- 🔒 Local & Private: All data stays on your machine. No cloud sync, no tracking, no accounts.
- 📂 Collections & Environments: Organize requests and manage Dev/Staging/Prod variables with ease.
- ⌨️ Power User UX: Native keyboard shortcuts and intuitive workflow.
Visit the Releases page to download the latest version:
| OS | Format | Download |
|---|---|---|
| macOS | .zip |
Universal Binary (Intel + Apple Silicon) |
| Windows | .exe |
64-bit Installer |
Prerequisites:
- Go 1.23+
- Node.js 20+
- Wails CLI
# 1. Install Wails
go install github.com/wailsapp/wails/v2/cmd/wails@latest
# 2. Clone the repository
git clone https://github.com/krockxz/gostman.git
cd gostman/gostman-gui
# 3. Build the application
wails buildRun the binary from build/bin/.
| Feature | Gostman | Postman | Insomnia |
|---|---|---|---|
| Launch Speed | < 1s | 10-20s | 5-10s |
| Privacy | 🔒 100% Local | ☁️ Cloud Sync | ☁️ Cloud Sync |
| Memory Usage | ~100MB | ~1GB+ | ~500MB+ |
| GraphQL/WS | ✅ Native | ✅ Native | ✅ Native |
| Data Ownership | You own it | Vendor lock-in | Vendor lock-in |
Gostman isn't just for REST. Test GraphQL APIs with full schema awareness and WebSockets for real-time app testing, all within the same interface.
Write tests in JavaScript using a familiar syntax. Assert response statuses, JSON body properties, and headers.
gostman.test("Status code is 200", () => {
gostman.response.to.have.status(200);
});Don't get stuck. Import your existing Postman Collections (v2.1) and Environment files instantly. Export your Gostman collections anytime in standard formats.
Run the application in development mode. This starts both the Go backend and the Vite frontend server.
cd gostman-gui
wails devGostman also runs as a pure web application (with some limitations like CORS, handled via proxy in production).
cd gostman-gui/frontend
npm run dev:webgostman/
├── gostman-gui/ # Main Application
│ ├── main.go # Application entry point
│ ├── app.go # Wails app context and backend methods
│ ├── wails.json # Wails project configuration
│ ├── frontend/ # React frontend (Vite)
│ │ ├── src/
│ │ │ ├── App.jsx # Desktop app component
│ │ │ ├── WebApp.jsx # Web app component (with landing page)
│ │ │ ├── components/ # UI Components
│ │ │ └── lib/ # Utilities (API, Storage, etc.)
│ └── build/ # Build output
└── README.md # Project DocumentationContributions are welcome! Please feel free to submit issues or pull requests.
This project is licensed under the MIT License - see the LICENSE file for details.