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

# Intro to Codex

> The fastest, most reliable enhanced data API for DeFi data across 100+ networks

Codex is a GraphQL API for real-time blockchain data: token prices, charts, transactions, wallets, and prediction markets across all major networks.

* Use [queries](/concepts/queries) for one-time fetches
* Use [subscriptions](/concepts/subscriptions) for live-streamed data
* Use [webhooks](/concepts/webhooks) for backend notifications

**Building with AI?** Connect via [Codex Skills](/agents/codex-skills), the [Docs MCP server](/agents/docs-mcp), or keyless pay-per-request access through [MPP](/agents/mpp).

<CardGroup cols={2}>
  <Card title="Get Started" icon="check" iconType="regular" href="/get-started">
    Get an API key and make your first request.
  </Card>

  <Card title="Add Codex to your project" icon="hammer" href="build">
    Get building right away with queries, subscriptions and webhooks.
  </Card>
</CardGroup>

<CardGroup cols={2}>
  <Card title="Learn GraphQL" icon="brain" href="learn-graphql">
    Learn useful terminology and concepts for using the GraphQL API.
  </Card>

  <Card title="FAQ" icon="question" href="extra/faq">
    Frequently asked questions
  </Card>
</CardGroup>

<CardGroup cols={2}>
  <Card title="Codex Docs MCP" icon="server" href="agents/docs-mcp">
    Add the Codex docs MCP server to your AI coding tools so it can read the docs directly.
  </Card>

  <Card title="Codex Skills" icon="robot" href="agents/codex-skills">
    Install the Codex skills so your AI agent can work with the Codex API directly.
  </Card>
</CardGroup>