Reqix – API Mock & Request Modifier · Local Processing

Mock APIs from DevTools requests. Modify requests and responses, redirect URLs, and debug locally without an account.

Build and test frontend features before the backend is ready. Reqix lets developers and QA teams mock APIs, inspect requests, and reproduce errors or slow responses in Chrome and Edge 138+, without changing application code or setting up a system proxy. Control API behavior • Mock Fetch/XHR responses with custom bodies, status codes, headers, and delays; cancel matching requests. • Generate dynamic responses with your JavaScript, and edit request headers, query parameters, and JSON bodies. • Redirect URLs, including scripts, stylesheets, and images. For resources other than Fetch/XHR, request rules support redirects only. Start with a real request Open the Reqix DevTools panel, reload the page or trigger a request, then inspect the traffic and create rules from one or several requests. Review and save your changes, confirm that the rules are enabled, and repeat the request. You can also record supported Fetch/XHR traffic and turn it into editable mock rules. DevTools inspection works independently of the request-handling switch. Organize reusable test scenarios Group rules by project or environment, check rule hits, and use global or per-site controls. Import and export rules, groups, and page scripts as local files. Run your own JavaScript or CSS on matching pages; importing .user.js files and Tampermonkey backups does not imply full compatibility with every userscript API. Page scripts require the browser's “Allow user scripts” setting. The interface supports 10 languages and light/dark themes. Local data, clear controls Rules, scripts, request debugging data, and preferences are processed and stored in your browser. Reqix needs no account and has no cloud sync or telemetry; it does not send this data to a developer backend. Request data can include URLs, headers, bodies, and credentials. Your scripts, dynamic response code, and redirects can access the network as configured. Review sensitive data before exporting. On first install, request handling is on globally; turn it off or choose per-site controls at any time. Delete saved content or uninstall to remove local data. Docs: https://reqix-dev.github.io/reqix-website/en/docs/ Website: https://reqix-dev.github.io/reqix-website/en/ Support: https://github.com/reqix-dev/reqix/issues Privacy: https://reqix-dev.github.io/reqix-website/en/privacy/