nagstamon

Install command: 
brew install --cask nagstamon

Name: Nagstamon

Nagios status monitor

https://nagstamon.de/

Cask JSON API: /api/cask/nagstamon.json

Cask code: nagstamon.rb on GitHub

Current version: 3.16.2

Requirements: macOS >= 10.15

Versions:

Intel tahoe 3.16.2
sequoia 3.16.2
sonoma 3.16.2
ventura 3.16.2
monterey 3.16.2
big sur 3.16.2
catalina 3.16.2

Analytics:

Installs (30 days)
nagstamon 40
Installs (90 days)
nagstamon 112
Installs (365 days)
nagstamon 500