I use it with apprise and mailrise (email interface over apprise) typically. Apprise is basically a generic notification sender that can send push notifications to a bunch of different clients, including gotify.

So, things like Proxmox errors get set to a fake mailrise address -> apprise -> gotify. And a lot of Linux apps in general (especially older ones) only support email notifications, so this is quite useful. You can also use apprise directly, even as a commandline interface. So you can make scripts to notify you of problems in cases where there isn’t already proper logging and notification support.

And I’ve setup diun to give me notifications for docker version updates. In this case, diun sends notifications to gotify directly.