EchoKit — API Recorder & Mocker

About

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.

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FREE TIER: Unlimited recordings, basic features
PRO: Advanced matching, GitHub sync, priority support

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