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

# Authentication

> Planned authentication principles for future Blockchain Library APIs.

## Current status

Authentication requirements will be documented when public API access is released.

## Principles

* Never place API keys in client-side public code.
* Rotate exposed credentials.
* Use least-privilege access.
* Document rate limits and scopes.