> ## Documentation Index
> Fetch the complete documentation index at: https://help.dingtalk.io/llms.txt
> Use this file to discover all available pages before exploring further.

# DingTalk Open Platform

> DingTalk Open Platform developer documentation, covering everything needed to build apps, integrate with APIs, and extend the platform.

## What you'll find here

The DingTalk Open Platform documentation covers everything you need to build apps, integrate with DingTalk's APIs, and extend the platform.

<CardGroup cols={3}>
  <Card title="Server-side APIs" icon="server" href="/open/development/server-api-calling-guide">
    REST endpoints for organizations, messaging, contacts, attendance, and more.
  </Card>

  <Card title="App development guides" icon="rocket" href="/open/dingstart/create-application">
    End-to-end tutorials for building your first DingTalk app.
  </Card>

  <Card title="Authentication" icon="key" href="/open/development/authorization-overview">
    OAuth flows, access tokens, JSAPI signing, and permission scopes.
  </Card>
</CardGroup>