How to setup a status monitor

Hi, I have a paper minecraft server running on docker in Debian 12(bookworm).

Maybe it’s a bit stupid, but I am trying to setup a public status monitor with uptime robot(https://uptimerobot.com/).

I have it setup to monitor the ip and port(TCP) given in the “Allocation (Shared IP)” field of my tunnel’s dashboard page. And to be clear, I am not pointing it to the randomly generated tunnel name.

When I shut the server down the status page still shows it as up. But when I stop the playit daemon only then does it show as down.

Is it possible to do this by pointing to the playit ip or do I need to look into hosting something like this locally?

Thanks