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

# Authentication

### Method 1: API key

1. Please contact [support@listenlabs.ai](mailto:support@listenlabs.ai) to request an API key.
2. Use it in your request as in the `x-api-key` header.

```bash theme={null}
'x-api-key': 'abc123....'
```

Note that this method currently only supports the `/responses` endpoints.

### Method 2: Google Id Token

This method is only possible if your account uses signin with Google (OAuth2). In that case, use set the `x-id` header to a valid *id\_token* from your Google account.

```bash theme={null}
'x-id': 'eyJh....'
```

[Documentation for Google ID tokens](https://developers.google.com/identity/openid-connect/openid-connect)