Hey folks, unfortunately these end-points were private and undocumented. Our private API end-points can and will change as we make changes to our systems. Whenever interacting with an API you should never rely on private end-points for this reason.
I am curious to learn how your applications where authenticating with these end-points. Learning more about this may help us prevent private end-points disappearing without any kind of warning.
Sorry for this inconvenience.