EchoKit is a Chrome extension designed for developers and QA professionals, enabling seamless recording and mocking of API interactions. With a user-friendly interface, users can record fetch, XHR, WebSocket, and SSE traffic with just one click. The extension allows for instant mocking of responses without requiring any proxy or code changes, making it an efficient tool for frontend development and testing. Additionally, it supports exporting recordings as JSON for integration with CLI/CI, and offers features such as per-tab mock toggling and coverage tracking to enhance the development process.

This tool requires zero setup, simplifying the workflow significantly. Users simply click to record their API interactions, use the application as usual, and then click to mock, replaying their recordings instantly. EchoKit also includes advanced features like URL matching modes, multi-step workflow mocks, and on-the-fly request/response transformations. With a focus on privacy, all data remains local to the browser, and the extension is open-source, ensuring transparency and security.