API Mock Server
Client-side fetch interceptor — no backend endpoint
About this tool
Mock REST APIs with a client-side fetch interceptor. Free, no server setup. API Mock Server runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.
What this tool does not do
- API Mock Server is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.
How do I use this tool?
How do I use API Mock Server?
Open API Mock Server, enter or paste your input, and copy the result. The page works without an account.
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