OpenAPI to in seconds.
Production-grade API infrastructure. Typed SDKs, Zod schemas, TanStack Query hooks, and 20+ plugins. Free and open source.
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Define your API
Start with an existing spec or create one from scratch. OpenAPI is the foundation that powers everything.
openapi: 3.2.0
info:
title: Equity Trading API
version: 1.2.0
paths:
/orders:
post:
operationId: createOrder
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/Order'
responses:
'201':
description: Order placed
content:
application/json:
schema:
$ref: '#/components/schemas/Order'
SDKs & Types
Typed SDK clients that regenerate as your API evolves. No handwritten interfaces to maintain.
Plugin Ecosystem
From TanStack Query to Zod. Every plugin is opt-in, independently useful, and built to work together.
HTTP Clients
Native support for your runtime. Fetch API, Axios, Angular, Next.js, Nuxt, and more.
Extensibility
Build custom plugins and clients with the same APIs powering the built-ins. A platform, not a black box.
The standard for API tooling.
Every API tool forces a trade-off: quality, workflow, cost, or speed. Often more than one. I wanted to know what happens when you refuse to compromise.
Hey API was built with one goal in mind: to be the last code generator you will ever need. Purpose-built from scratch, held to the standard the best engineering teams apply to their own codebase.
The result of that work is yours, one install away.
- Your spec is broken or out of date.
- You're building a one-off integration, not a long-term API contract.
- You already have a codegen workflow that works.
- You want zero build steps.
- We don't support your language yet.
If none of these apply, you'll probably love it.
Coming soon
Python is next.
The ecosystem trusted by TypeScript developers is coming to Python codebases. Production-grade SDKs, Pydantic models, and more. Sign up for early access.
Ready when you are.
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