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

# MCP overview

> Connect AI clients to the Chain over MCP.

<Warning>
  **Early access** — Remote MCP and tool lists evolve. [**Join the Product Brain Community**](https://community.productbrain.io).
</Warning>

Product Brain exposes the **Chain** over MCP. **You** use natural language in your host; **your agent** calls tools like `orient` and `entries`.

## Hosted URL

```
https://mcp.productbrain.io/mcp
```

Authenticate with:

```http theme={null}
Authorization: Bearer pb_sk_your_workspace_key
```

Details: [MCP authentication](/docs/mcp/authentication).

## Philosophy

Compound tools with `action` fields keep schemas small for hosts with tool limits.

## Minimal Cursor config

```json theme={null}
{
  "mcpServers": {
    "productbrain": {
      "url": "https://mcp.productbrain.io/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}
```

## Next

* [Knowledge tools](/docs/mcp/knowledge-tools)
* [Session tools](/docs/mcp/session-tools)
* [Cursor](/docs/integrations/cursor)