Scalar is an open-source API platform: 🌐 Modern Rest API Client 📖 Beautiful API References ✨ 1st-Class OpenAPI/Swagger Support
Scalar
An offline first API Client built for OpenAPI
└ Minimal, powerful & open-source
└ Integrates with dozens of API Frameworks (Elysia, Hono, FastAPI, etc)
└ Syncs directly with your server frameworks with our Watch Mode
└ First class OpenAPI (formerly Swagger) support
└ Environment variables and dynamic parameters
└ Save and organize requests into collections
└ Download (Windows, MacOS, Linux)
└ Try Online Demo
Interactive API Reference from OpenAPI/Swagger
└ Uses OpenAPI/Swagger documents└ Request examples for many favorite languages and frameworks
└ Comes with an integrated API playground
└ Integrates with your favorite framework
└ Doesn't look like 2011
└ Try Demo
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Quickstart
You’re just one HTML file away from having an awesome API reference:
<!doctype html>
<html>
<head>
<title>Scalar API Reference</title>
<meta charset="utf-8" />
<meta
name="viewport"
content="width=device-width, initial-scale=1" />
</head>
<body>
<div id="app"></div>
<!-- Load the Script -->
<script src="https://cdn.jsdelivr.net/npm/@scalar/api-reference"></script>
<!-- Initialize the Scalar API Reference -->
<script>
Scalar.createApiReference('#app', {
// The URL of the OpenAPI/Swagger document
url: 'https://cdn.jsdelivr.net/npm/@scalar/galaxy/dist/latest.json',
// Avoid CORS issues
proxyUrl: 'https://proxy.scalar.com',
})
</script>
</body>
</html>
Need a Custom Header? Check out this example: https://codepen.io/scalarorg/pen/VwOXqam
And there’s an ever-growing list of plugins and integrations:
Integrations
- HTML/JS API (works everywhere)
- .NET
- AdonisJS
- Django
- Django Ninja
- Docusaurus
- Express
- FastAPI
- Fastify
- Go
- Hono
- Laravel Scribe
- Micronaut
- NestJS
- Next.js
- Nuxt
- React
- Ruby on Rails
- Rust
- Scalar for Laravel
- Ts.ED
- Vue.js
- Python
Built-in Support
The following frameworks have chosen Scalar API Reference as their default OpenAPI documentation UI, recognizing its developer-friendly features and modern design:
Managed Hosting
We’re offering a free and paid managed hosting on the edge, too:
- Write your API documentation and publish your API references (free)
- Get SSL and a super cool
*.apidocumentation.comsubdomain (free) - Write free text documentation (paid)
- Collaborate with your whole team (paid)
- Use any domain (paid)
Ready? Create your account on scalar.com.
Projects
| Project | Description |
|---|---|
| Scalar API Client | API client |
| Scalar CLI | Command-line interface |
| Scalar Galaxy | OpenAPI Example |
| Scalar Mock Server | OpenAPI Mock Server |
| Scalar Void Server | HTTP Request Mirror |
| Scalar Open API Parser | OpenAPI SDK |
| Scalar Sandbox | Online OpenAPI Editor |
Documentation
| Topic | Description |
|---|---|
| Themes | Predefined themes, layouts & styling |
| Configuration | The universal configuration object |
| Plugins | Extend the functionality |
| OpenAPI | OpenAPI and our extensions to it |
| Markdown | The supported Markdown syntax |
Community
We are API nerds. You too? Let’s chat on Discord: https://discord.gg/scalar
Contributions
Contributions are welcome! Read the CONTRIBUTING guide.
Top 10 Contributors (April 2025)
Top Contributors (All Time)
