> ## 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 authentication

> API keys and scopes for MCP clients.

<Warning>
  **Early access** — [**Join the Product Brain Community**](https://community.productbrain.io).
</Warning>

Create `pb_sk_…` keys in the app. Send:

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

Hosted MCP URL: `https://mcp.productbrain.io/mcp` (see [MCP overview](/docs/mcp/overview)). Use read vs read-write keys per need.