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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. Compare

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openapistack

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the stack

Three libraries. One ecosystem.

Free and open-source, MIT-licensed, framework-agnostic. Pick any one or use them together.

Backend

openapi-backend

Build, validate, route, authenticate and mock your backend using the openapi-backend library. Framework-agnostic, runs on Express, Hapi, Koa, AWS Lambda and more.

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Client

openapi-client-axios

Easily consume your OpenAPI specification using the typesafe openapi-client-axios library. Full TypeScript IntelliSense, runtime introspection, no codegen required.

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CLI

Generate types, design and test your API using the openapicmd command line tool. Bundle, lint, mock and serve OpenAPI specs from one binary.

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Interactive Example

This is a minimal full-stack React application using openapi-stack and Next.js.

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openapistack · contributors

Built by 62+ contributors

openapi-stack is the work of dozens of engineers across 7 repositories — backend, client, CLI, utilities, and docs. Thank you to everyone who has filed an issue, opened a PR, or reviewed code.

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openapistack on GitHub