`superagent-mock` is a plugin for the **superagent** HTTP client that intercepts requests and returns preset fixture data instead of hitting a real server. It lets developers define URL patterns and custom response logic (including status codes, delays, errors, and progress events) for use in unit‑ or integration‑tests, and provides optional logging of each mocked call. The library is aimed at Node .js developers who need fast, controllable HTTP mocks while testing code that relies on superagent.