It seems like a natural feature for CF, alert me when my site is down. I’d rather hear about if from CF than from my users. I saw in someone in the community recommend UptimeRobot.com … I’ll check that out if CF doesn’t support this feature.
It’s not supported. UR works pretty good. I’ve set up two cecks per hos. 1 for HTTP, one for ping directly to the host IP.
Hyperspin is good, too. I recommend searching for text in the footer in the test rather than just a 200/OK. Then you know the full stack is working.