Moqyy — API Mocking & Fetch/XHR Interceptor

Mock APIs, intercept fetch/XHR requests, and test frontend apps without backend. Built for frontend developers and QA testers.

Moqyy is a powerful browser extension designed for developers and testers who want full control over HTTP requests made from their browser. With Moqyy, you can easily intercept, inspect, and mock outgoing HTTP(S) requests in real-time—without setting up a proxy or changing your application code. Whether you’re building new features, debugging APIs, or testing error scenarios, Moqyy helps you save time and work more efficiently by letting you modify responses on the fly. Main Features: Intercept HTTP Requests: Instantly view and filter all outgoing requests from your browser, including AJAX and fetch calls. Mock Server Responses: Create custom rules to modify or replace server responses with your own test data. Easy Rule Management: Enable, disable, or edit your mock rules at any time with a clean, intuitive interface. Flexible Targeting: Match requests by URL, method, or patterns for precise control over what gets intercepted or mocked. No External Setup: Works directly in your browser—no need for proxies, backend changes, or third-party servers. Moqyy empowers you to develop, test, and debug web applications faster and more effectively. Install Moqyy and take control of your browser’s network traffic—right from your toolbar.