WireMock : Free and Open Source tool for building mock APIs. Create stable development environments, isolate yourself from flakey 3rd parties and simulate APIs t...
httpbin.org : A simple HTTP Request & Response Service.
Cool QL Cool : CoolQLCool (CQC) is an open source GraphQL server that allows you to turn websites into GraphQL APIs.
BlurHash : BlurHash is a compact representation of a placeholder for an image.
Grafana k6 : Grafana k6 is an open-source, developer-friendly, and extensible load testing tool. k6 allows you to prevent performance issues and proactively improv...
Mockoon is the easiest and quickest way to design and run mock APIs. No remote deployment, no account required, free and open-source.