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

# Agents API

> Use MCP, A2A, and the generated function catalog to connect agent clients to Hybridbox.

# Agents API

Choose the agent integration surface that matches your client. The Agents API documentation covers MCP tools, direct A2A gateway calls, and the generated function catalog used by both flows.

<CardGroup cols={3}>
  <Card title="MCP guide" icon="plug" href="/en/agents/mcp">
    Connect MCP clients, list tools, explain functions, and execute validated Hybridbox calls.
  </Card>

  <Card title="A2A guide" icon="users" href="/en/agents/a2a">
    Create sessions, discover functions, execute JSON-RPC calls, and subscribe to WebSocket updates.
  </Card>

  <Card title="A2A function catalog" icon="list" href="/en/agents/a2a-function-catalog">
    Browse generated function signatures, required permissions, execution modes, and public API route mappings.
  </Card>
</CardGroup>