> For the complete documentation index, see [llms.txt](https://flickrz.gitbook.io/whitepaper-flickrz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://flickrz.gitbook.io/whitepaper-flickrz/api-documentation/authentication.md).

# Authentication

   **a)** **API Key Generation:** Users can generate their API keys by logging into their Flickrz account and navigating to the API settings section. They can then create a new API key and securely store it for authentication purposes.

   **b)** **API Key Usage:** Once users obtain their API key, they must include it in the request headers of API calls to authenticate their requests. The API key should be included in the Authorization header as a Bearer token.

Authentication is required for certain endpoints. The Flickerz API currently supports API key authentication. Please include your API key in the request headers as follows:

```
Authorization: Bearer YOUR_API_KEY 
```


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