daj, I did a thing.
I run a couple of Fediverse servers; on a daily basis the delivery queue can build up as it tries to deliver to non-responsive servers. I need to know if this is a temporary issue, or a longer-term problem spanning many days -- in which case I may stop delivery to the server.
#FediCheck was born. It's simple but useful (to me at least). I'm putting it out in the wild today for others to test.