insomnia-mockbin

Mockbin lets you create fake API endpoints that return whatever response you define. If you're building an app that talks to an API that doesn't exist yet, or you need to test how your code handles different HTTP responses (errors, timeouts, weird headers), Mockbin gives you a URL that acts like that API.

It's the testing utility behind Insomnia (Kong's API client). You define a response (status code, headers, body) and get a public URL that returns it. Also logs incoming requests so you can inspect what your app actually sent.

This specific repo is the open source Mockbin service. You can self-host it or use the hosted version through Insomnia. The project itself is small and development is minimal. It's a utility, not a platform.

The catch: Mockbin is a small piece of the Insomnia ecosystem. Insomnia itself is where the real API testing workflow lives, and Insomnia's pricing has gotten complicated since Kong acquired it. The free Insomnia tier works for basic use. If you just need mock endpoints, Mockbin standalone is fine. But if you want a full API development workflow, look at Bruno (free, open source) or Hoppscotch.