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Full stack typesafe API-first development for REST.

OpenAPI Stack is a collection of open source libraries and tools for full stack Typescript development inspired by modern alternatives like GraphQL and tRPC.

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Backend

Build, Validate, Route, Authenticate, and Mock your backend using the openapi-backend library.

Client

Easily consume your OpenAPI specification using the typesafe openapi-client-axios library.

CLI

Design, automate and test your API using the openapicmd command line tool.