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

# Authentication and API keys

> Key generation, rotation, and storage best practices.

<Note>
  How-to guide — priority P0.
</Note>

## To be written

* How to generate an API key (sandbox and production)
* Key rotation and revocation
* Client-side storage best practices (environment variables, secrets vault)
* Common authentication errors and how to resolve them