Open-source API client and HTTP interceptor to test APIs, modify requests and responses, and create API mocks for faster development and debugging.

6.8k stars700 forkslast commit Actively maintained

Cloud service for creating mock HTTP endpoints to inspect requests, simulate responses, validate webhooks and test integrations without a backend. Provides request logging, response templating/rules, replay and inspection tools for API debugging and testing.
Open-source API client and HTTP interceptor to test APIs, modify requests and responses, and create API mocks for faster development and debugging.

6.8k stars700 forkslast commit Actively maintained
Capture, inspect and debug webhooks and HTTP requests with customizable responses, real-time WebSocket UI, and memory/Redis/filesystem storage options.

530 stars57 forksMITlast commit Actively maintained
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 2 of 2 shipped a commit in the last six months. Licences in this list: MIT. In exchange you take on hosting, backups and updates yourself.
Browse everything in API Development, Mocking & Testing.