Keep in mind that ntfy works with a bunch of backends. You can send the notifications to Telegram, jabber/XMPP, IRC (using my own https://n.tkte.ch), Slack, etc, etc. So, you probably don't have to actually install anything new to receive notifications and can just use what you've already got.
I don't think ntfy.sh does that, but are you talking about https://github.com/dschep/ntfy?