hey-api

hey-api is a devtool that generates production-grade Python and TypeScript SDKs, Zod schemas, TanStack Query hooks, and Pydantic models from OpenAPI specs, offering 20+ plugins for customization. It’s designed for developers building API clients who need type-safe, framework-integrated codegen, and is trusted by companies like Vercel, OpenCode, and PayPal. Its appeal lies in bridging OpenAPI to multiple ecosystems with minimal configuration, enabling faster, safer API consumption across frontend and backend stacks.