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

# Unauthorized

> Unauthorized access

### What Happened?

You made a request with an invalid or missing API key in the `x-api-key` header. The API key is required to authenticate your request and access the API.

### How to Prevent or Fix

Make sure you include the correct API key in the `x-api-key` header of your request.
Check out [Authentication](/api-reference/authentication) for more information on how to authenticate your requests.