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

# Authentication

Our API uses Basic Authentication with a unique Organization ID and API Key combination.

## Authentication Header

Include the following header in all API requests:

```
Authorization: Basic {{orgID}} {{apiKey}}
```

Where:

* `{{orgID}}`: Your unique Organization ID
* `{{apiKey}}`: Your API Key

## API Keys

API Keys are environment-specific and follow this format:

* Development: `nxo_test_...`
* Production: `nxo_live_...`

## Example

```http theme={null}
GET /api/v1/endpoint HTTP/1.1
Host: api.example.com
Authorization: Basic org_12345 nxo_live_abcdefghijklmnop
```

> **Important:** Keep your API Key confidential. Never share it in publicly accessible areas or client-side code.

## Obtaining Credentials

Contact our support team to get your Organization ID and API Key.