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

# Authentication

> Leen.dev's Authentication Method

```bash theme={null}
'X-API-KEY': '<API-TOKEN>'
'X-CONNECTION-ID': '<CONNECTION-ID>'
```

Authentication is handled by two different headers, both are **required**.

`X-API-KEY`:

This is your API token, this will be provided to you at onboarding.

`X-CONNECTION-ID`:

This is the connection ID representing an end-user's data source, this connection must be a valid connection id that belongs to your account.