EchoKit — API Recorder & Mocker

Record real API interactions and instantly mock them. Zero setup. Built for frontend devs & QA. Record once. Mock reliably.

EchoKit is a Chrome extension that records your real API interactions and lets you instantly mock them for testing and development. 🎯 BUILT FOR DEVELOPERS & QA • Record fetch/XHR/WebSocket/SSE traffic with one click • Mock responses instantly — no proxy, no code changes • Export recordings as JSON for CLI/CI integration • Per-tab mock toggle — work on new features while mocking legacy APIs • Coverage tracking to see which mocks are actually used ⚡ ZERO SETUP REQUIRED 1. Click Record 2. Use your app normally 3. Click Mock 4. Replay your recordings instantly No configuration files. No webpack plugins. No backend setup. 🚀 POWERFUL FEATURES • URL matching modes: strict, fuzzy, regex, custom rules • Chain mocks for multi-step workflows (login → dashboard → data) • Transform rules to modify requests/responses on the fly • WebSocket & Server-Sent Events support • Export to Postman, HAR, or EchoKit JSON • GitHub Gist sync for team collaboration (Pro) • Headless CLI server for CI/CD pipelines 💼 USE CASES • Frontend development without waiting for backend APIs • E2E testing with reliable, repeatable API mocks • Demo presentations with offline data • Debugging production issues with recorded traffic • QA automation with consistent test data 🔐 PRIVACY FIRST • All data stays local in your browser • No analytics, no tracking, no telemetry • Open source: github.com/ravitejakamalapuram/echokit 📦 CLI INTEGRATION Install the headless server for CI/CD: npm install -g echokit-server Run in GitHub Actions, Jenkins, or any CI pipeline. --- FREE TIER: Unlimited recordings, basic features PRO: Advanced matching, GitHub sync, priority support Get started in seconds. No signup required.