Mocksy - API Server & Mock

Mocksy is a powerful macOS tool for creating mock API endpoints, previewing JSON responses, and inspecting every request in real time. Whether you’re building an iOS, macOS, or web app, Mocksy helps you test faster without relying on live backend services. Build fully customizable local servers, craft flexible responses, and instantly verify how your app communicates with APIs. Mocksy is designed for developers who want a smooth, reliable workflow during prototyping, testing, and debugging. Key Features Create custom mock endpoints with JSON, headers, and status codes Local server engine that runs instantly—no setup required Live request inspector to monitor calls and debug traffic Preview responses exactly as clients receive them Organize multiple endpoints for different testing scenarios Lightweight, fast, and built for macOS Mocksy removes backend blockers and gives you complete control over your testing environment. Perfect for mobile developers, web developers, and anyone building on APIs.