Hey API

Appearance

Get Started ​

WARNING

This package is in initial development. The interface might change before it becomes stable. We encourage you to leave feedback on GitHub.

@hey-api/openapi-ts is an OpenAPI to TypeScript codegen trusted more than 600k times each month to generate reliable API clients and SDKs.

Features ​

  • works with CLI, Node.js 18+, or npx
  • supports OpenAPI 2.0, 3.0, and 3.1 specifications
  • supports both JSON and YAML input files
  • generates TypeScript interfaces, SDKs, and JSON Schemas
  • Fetch API, Axios, Angular, Node.js, and XHR clients available
  • plugin ecosystem to reduce third-party boilerplate

Quick Start ​

The fastest way to use @hey-api/openapi-ts is via npx

sh
npx @hey-api/openapi-ts -i path/to/openapi.json -o src/client -c @hey-api/client-fetch

Congratulations on creating your first client! 🎉 You can learn more about the generated files on the Output page.

Before you can make API requests with the client you've just created, you need to install @hey-api/client-fetch and configure it. Let's start by declaring your dependencies.

Installation ​

sh
npm install @hey-api/client-fetch && npm install @hey-api/openapi-ts -D
sh
pnpm add @hey-api/client-fetch && pnpm add @hey-api/openapi-ts -D
sh
yarn add @hey-api/client-fetch && yarn add @hey-api/openapi-ts -D
sh
bun add @hey-api/client-fetch && bun add @hey-api/openapi-ts -D

We recommend pinning an exact version so you can safely upgrade when you're ready. This package is in initial development and its API might change before v1.

CLI ​

Most people run @hey-api/openapi-ts via CLI. To do that, add a script to your package.json file which will make openapi-ts executable through script.

json
"scripts": {
  "openapi-ts": "openapi-ts"
}

The above script can be executed by running npm run openapi-ts or equivalent command in other package managers. Next, we need to create a configuration file and move our options from Quick Start to it.

Node.js ​

You can also generate clients programmatically by importing @hey-api/openapi-ts in a TypeScript file.

ts
import { createClient } from '@hey-api/openapi-ts';

createClient({
  client: '@hey-api/client-fetch',
  input: 'path/to/openapi.json',
  output: 'src/client',
});

Configuration ​

It is a good practice to extract your configuration into a separate file. Learn how to do that and discover available options on the Configuration page.

Examples ​

You can view live examples on StackBlitz.

Sponsoring ​

Love Hey API? Please consider becoming a sponsor.