Stop Releases are listed at [1] and [2]. They are correct now on 2021-11-09.
Although I try to keep good care of them, mistakes may happen.
Stop Releases should not have a big role anymore, in my understanding, as most users are able to reflash their Xperia devices again, instead of taking the painful reset-device-and-update-via-stop-releases approach.
What comes to [1], at least I have done nothing to “prevent scripted downloads programmatically” - I do not even know how to do it.
[1] https://jolla.zendesk.com/hc/en-us/articles/201836347#4.1
[2] Sailfish OS - Wikipedia