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

# Authentication

> Authenticate Noonum REST API and MCP server requests with your Noonum API key as a Bearer token.

Every request to the Noonum REST API and MCP server is authenticated with a single
HTTP header:

```text theme={null}
Authorization: Bearer <token>
```

The `<token>` is your Noonum API key, the only authentication method for the REST API
and MCP server.

## Base URLs

| Setting       | Value                                           |
| ------------- | ----------------------------------------------- |
| REST base URL | `https://api.noonum.ai/v1`                      |
| MCP base URL  | `https://api.noonum.ai/v1/mcp` (HTTP transport) |

## Getting an API key

To request a Noonum API key, contact support at **[hello@noonum.com](mailto:hello@noonum.com)**.

## REST API authentication

Send your key as a Bearer token in the `Authorization` header:

```bash theme={null}
curl -X GET "https://api.noonum.ai/v1/strategies" \
  -H "Authorization: Bearer YOUR_API_KEY"
```

An invalid or missing key returns `401 Unauthorized`.

## MCP authentication

Point your MCP client at `https://api.noonum.ai/v1/mcp` (HTTP transport). Provide your API
key as a static `Authorization` header, for example in `claude_desktop_config.json`:

```json theme={null}
{
  "mcpServers": {
    "noonum": {
      "url": "https://api.noonum.ai/v1/mcp",
      "headers": { "Authorization": "Bearer YOUR_API_KEY" }
    }
  }
}
```

For connecting an MCP client (including interactive sign-in), see
[MCP client setup](/base/agentic/mcp-client-setup).

## Next steps

<CardGroup cols={2}>
  <Card title="API reference" icon="code" href="/v1/api-reference/introduction">
    Browse the REST endpoints.
  </Card>

  <Card title="MCP client setup" icon="plug" href="/base/agentic/mcp-client-setup">
    Connect an MCP client to the Noonum MCP server.
  </Card>
</CardGroup>