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

# Overview

> Start building Attio Apps

Attio is a revolutionary CRM platform which is highly customisable, incredibly powerful and
data-driven. In these guides, you can find everything you need to build powerful integrations,
automations and data pipelines on top of Attio.

Our docs cover guides, examples, references and code to help you build apps and share them with
Attio's customers or for your own workspace.

The Attio Developer Platform consists of three parts:

<Card title="App SDK" icon="react" iconType="solid" href="/sdk/guides/creating-an-app">
  This allows developers to embed Typescript React applications within the Attio interface and run
  server functions with access to our REST API.
</Card>

<Card title="REST API" icon="server" iconType="light" href="/rest-api/overview">
  This allows developers to build apps that read and write information to and from Attio workspaces.
  You can also subscribe to events in realtime using webhooks.
</Card>

<Card title="MCP" icon="sparkles" iconType="light" href="/mcp/overview">
  Manage Attio via AI. Connect Claude, ChatGPT or your AI tool of choice to search, update and
  manage your Attio workspace.
</Card>

You can use both the App SDK and REST API in your app to build rich experiences.