WireMock : Free and Open Source tool for building mock APIs. Create stable development environments, isolate yourself from flakey 3rd parties and simulate APIs t...
npoint.io : JSON storage bins with schema validation
Flagr : Flagr is an open source Go service that delivers the right experience to the right entity and monitors the impact. It provides feature flags, experime...
httpbin.org : A simple HTTP Request & Response Service.
DuckRails : DuckRails is a development tool.
Its main purpose is to allow developers to quickly mock API endpoints that for many possible reasons can't reach at a...
Mockoon is the easiest and quickest way to design and run mock APIs. No remote deployment, no account required, free and open-source.