Using a monitoring system introduce alert or notifications about a new issue or the end of it.
As I use multiple system (home, work, on the move), my big problem was to use a unique system to send alert to all plateform.
I previously used successfully Growl or Prowl to send / receive, but it has no desktop app on all plateform I stopped used it.
I finally discover PushOver.
It allow to have a native client to receive notification on desktop and mobile device (IOS, Android).
The sender apps can be curl or python.
It’s free until you reach 7500 Messages per month