Echo - API Mock & Patch Engine

Offline API mock and patch engine for browser requests.

Echo - API Mock & Patch Engine Overview Echo is a powerful developer tool designed to streamline frontend development and testing by giving you complete control over network requests. Intercept `fetch` and `XMLHttpRequest` calls directly in the browser to mock APIs, simulate errors, and test edge cases without modifying your application code. Key Features 1. Request Interception: Capture and control HTTP requests on any page. 2. Mock Responses: Serve custom JSON or text responses instantly. 3. Live Patching: Modify request/response headers, bodies, or status codes on the fly. 4. Network Simulation: Add configurable delays to test loading states and race conditions. 5. Advanced Matching: Target specific requests using URL patterns (exact, contains, regex) and HTTP methods. 6. Offline Development: Continue working even when backend services are down. 7. User-Friendly Interface: Modern UI with a powerful JSON editor and drag-and-drop rule management. Why Install Echo? *Boost Productivity: Stop waiting for backend endpoints to be ready. Mock them in seconds. *Debug Faster: Reproduce hard-to-find bugs by forcing specific API responses or errors (e.g., 500, 404). *Test Safely: Experiment with API changes safely in your browser without risking production data. Perfect for frontend developers, QA engineers, and anyone building web applications.