Mock API Builder

Define mock endpoints + response payloads. Use the output snippets in your tests or with tools like MSW, Mirage, or json-server.

MethodPathStatusResponse (JSON)

json-server config

 

MSW handler snippet

 

About this tool

Mock API Builder is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.

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