Hey API

"OpenAPI codegen that just works."
_{— Guillermo Rauch, CEO of Vercel}

## About Hey API is an ecosystem for turning API specifications into production-ready code. It's trusted by thousands of companies – from YC startups to Fortune 500 enterprises – and powers products used by millions worldwide. This is the monorepo containing all open source Hey API packages. For package-specific documentation and quick start guides, see the individual repositories below. ## Packages

Package	Description
`openapi-ts`	TypeScript code generator with 20+ plugins for SDKs, Zod schemas, TanStack Query hooks, and more. Manual • npm
`openapi-python`	Python code generator for SDKs and Pydantic models. Manual • npm

## Highlights - production-grade code that compiles - runs in any Node.js 22+ environment - accepts any OpenAPI specification - core plugins for SDKs - HTTP clients for Fetch API, Axios, Angular, Next.js, Nuxt, HTTPX, and more - Zod schemas, TanStack Query hooks, Pydantic models, and 20+ plugins to reduce third-party boilerplate - highly customizable via plugins ## Libraries

Package	Description
`spec-types`	TypeScript definitions for OpenAPI and JSON Schema specifications with complete inline documentation. npm

## Contributing Want to see your code in products used by millions? Start with our [Contributing](https://heyapi.dev/docs/openapi/typescript/community/contributing) guide and release your first feature. ## Sponsors Partners behind the future of API tooling. [Become a sponsor](https://github.com/sponsors/hey-api).