A custom integration can be used to send alerting messages to any external application. The outgoing message can be fully customized to include various points of data based on the monitor and error that caused the alert, using automatic variables (such as an error timestamp, a link to the monitor in error, the IP address of the checkpoint that executed the check, etc).
The @alert.description variable will now also include a reference to the step number, in case the erroring monitor is a transaction or multi-step API monitor.