This guy did a neat blog about creating a notification that pops up over what you’re watching. Only a year later and all that is gone and replaced with a relatively trivial retrieval of an Authentication Token (X-Plex-Token) requirement before interacting with the API.
So having said all that, I don’t suppose the notification popups still work once you’ve got your new token to work with? I’ve Googled this without luck, but found reference to this support ticket which i can’t access. The support ticket apparently involves people requesting a non-existent notification service (which appears to have already existed according to the blog i already shared… no?). I don’t see any reference to notifications on the Plex API Wiki either. 
My goal is that I’d like to add Plex Notification support to my Apprise plugin.
Any advice, suggestions of feedback would be great!