The page endpoint is the heart of the Makaira Marketing Suite when it comes to using Enterprise features like the page editor.
It's main purpose is retrieving a page document for a given URL.
In the most simple case, the URL belongs to Landingpage that was created in the Makiara-Backend. In this case, it is enough to supply the URL and Shop-ID in the request body.
In more advanced cases, the URL may belong to a category or manufacturer page. In this case, you can and should supply additional information in the request body, e.g. for sorting or pagination.