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

# Authentication

All API endpoints require authentication using an API key and a Hyperhash App ID header. Include the following headers with every request:

* **x-api-key**\
  `string` **(required)**\
  Your Hyperhash API key used to authenticate the request.
* **hyperhash-app-id**\
  `string` **(required)**\
  Your Hyperhash App ID, used to identify your application.

Requests missing either of these headers will be rejected by Hyperhash’s authentication middleware.