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

# Authentication

To ensure secure access, all API requests must be authenticated. Follow the steps below to authenticate your requests:

1. Obtain an API Key: Before making requests, obtain your sandbox or live API key. This key uniquely identifies you as a user and grants access to the API features.
2. Include an Authorization Header: With your API key, authenticate each request by including an Authorization header. Use the Bearer token type for authentication.
3. Format Your Request: Your request should include the Authorization header as follows, replacing YOUR\_API\_KEY with the actual key you obtained:

```
Authorization: Bearer YOUR_API_KEY
```

Ensure that you replace YOUR\_API\_KEY with your actual sandbox or live API key. Using this method, your requests are authenticated, allowing you to securely access the API functionalities.