No valid links to the AKHQ-API

[PatHocPHA]

Hi,
i want to use the API instead of the Frontend for accessing AKHQ.

According to this (https://akhq.io/docs/api.html) there should be an experimental API but the links merely link to the Websites (https://rapidocweb.com/ & https://www.openapis.org/) where the API-Spec is supposed to be (can't find it there).

Can i find the API-Spec somewhere else?