[rfv6723]

I use self-hosted gatus to monitor my certs and other services' status.

It can send alerts to multiple alerting providers.

https://github.com/TwiN/gatus

[hoherd]

I use uptime-kuma[1] with notifications sent out through the included Apprise integration[2]

1. https://github.com/louislam/uptime-kuma

2. https://github.com/caronc/apprise