Setup a single monitor for Uptime Kuma that alerts you with details about failure

Problem/Motivation

This is an amazing module, thank you for making it available. I do have a proposal for your documentation, though:

Assume, you have 20 active sensors in your Drupal site, and you want to setup Uptime Kuma with just 1 monitor that goes red if at least 1 sensor is not OK.

Proposed resolution

This can be done with the following settings:

The JSON Query Expression is $keys($sift($, function($v) { $v != 'OK' and $v != 'INFO' })) and that should be equal to count_failures. That gives you a green status. For anything else, it turns red.

What that JSON Query Expression does is to determine all keys in the received JSON array that have value not equal to OK. When all sensors are OK, this returns just count_failures which contains a number.