But we need another one to detect whether yours is still up.

It's downdetectorsdown all the way down.

https://downdetectorsdowndetectorsdowndetector.com/

Given enough of them, some fraction will always be down. It would be helpful if we had a site that could track that ratio.

here's a page that monitors that page: https://onlineornot.com/website-down-checker?requestId=jCfaD...

Looks like it's hosted in London?

Downdetection can be thought of as a directed graph, or digraph*.

From there, the "who's watching who?" can become mathematically interesting.

* https://en.wikipedia.org/wiki/Directed_Graph