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OpenAPI to TypeScript in seconds.

Generate production-ready SDKs and validators from your OpenAPI spec. Used by Vercel, OpenCode, and PayPal.

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OpenAPI to TypeScript

Generate production-ready TypeScript from any OpenAPI specification.

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Instant SDKs

Highly customizable SDKs and types with sensible defaults that compile out of the box.

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HTTP Clients

Pluggable HTTP clients for Fetch API, Angular, Axios, Next.js, Nuxt, and more.

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Plugin Ecosystem

Zod, TanStack Query, and 20+ plugins to reduce third-party boilerplate.

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Custom Extensions

Build custom plugins for proprietary or advanced use cases.

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Integrations

Sync specs, automate workflows, and integrate with the Hey API Platform.

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Gold

Best-in-class developer interfaces for your API.
stainless.com
The open source coding agent.
opencode.ai

Silver

scalar.com
fastapi.tiangolo.com

OpenAPI to TypeScript in seconds.

OpenAPI to TypeScript

Instant SDKs

HTTP Clients

Plugin Ecosystem

Custom Extensions

Integrations

Sponsors

Gold

Silver

Bronze

Friends

OpenAPI to TypeScript in seconds.

OpenAPI to TypeScript

Instant SDKs

HTTP Clients

Plugin Ecosystem

Custom Extensions

Integrations

Sponsors ​

Gold ​

Silver ​

Bronze ​

Friends ​

Sponsors

Gold

Silver

Bronze

Friends