Work with your API before you write any code Prism is an open-source HTTP mock server that can mimic your API's behavior as if you already built it. Mock HTTP servers are generated from your OpenAPI v2/v3 (formerly known as Swagger) documents.

Powerful product for free!

Congratulations on the launch of Prism! I'm excited to see how easy it is to mock my API using this fantastic tool!

The open-source Vercel alternative

StopLight

The easiest way to test, debug, and share your web APIs

The easiest way to test, debug, and share your web APIs

StopLight

The easiest way to test, debug, and share your web APIs

The easiest way to test, debug, and share your web APIs

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