GoalStackApp
Developer Tools
Only for Mac
Free · In‑App Purchases
Mac
Your test server won't return a 500 on demand. GoalStack will.
GoalStack turns any JSON into a live local endpoint in seconds. Point your iOS Simulator, Android emulator, or a real device on the same Wi-Fi at it, and choose exactly what comes back: the data, the status code, even deliberately broken JSON.
BUILT FOR TESTERS
The bugs that slip through are the ones you can't trigger: a 500 mid-checkout, a 401 after login, a malformed response, an empty body. Instead of begging the backend team or editing server code, set up the response yourself and switch between them in one click. Verify your app handles every failure before your users find it.
WHAT YOU GET
- Paste JSON and start a server with one switch
- Live validation with the exact line and column of any syntax error
- Turn validation off to return intentionally invalid JSON and test your parser
- Multiple status codes per route (200, 401, 404, 500, any code you need), switchable instantly
- Path parameters like /users/{id}
- Request log showing every call your app makes, with its status
- Copy the URL and use it from Simulator, Emulator, curl, or a browser (CORS enabled)
- Generate Swift Codable and Kotlin data class models from your JSON
- Copy-ready request code for Swift, Kotlin, and React
- Light and dark themes
- Works offline. Your data never leaves your Mac.
FREE TO START
Try the full workflow with one route, free.
GoalStack PRO (one-time purchase)
- Unlimited routes and status codes per route
- Multiple projects, each running its own server on its own port, so you can mock two apps at once even if their paths overlap
For QA engineers, mobile developers, and frontend developers who are tired of waiting on a backend to test the unhappy path.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Fixed an issue that prevented the app from correctly loading in-app purchase products.
The developer, Qiushi Hu, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Qiushi Hu
- Size
- 1.4 MB
- Category
- Developer Tools
- Compatibility
Requires macOS 14.0 or later.
- Mac
Requires macOS 14.0 or later.
- Mac
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- GoalStack Pro $12.99
- Copyright
- © 2026 Hu Qiushi