A custom integration lets you send customized alerting messages from Uptrends to any external service, such as your incident management system. The outgoing alert message can be populated with relevant information (such as which monitor caused the alert, what the error was, etc) through the use of alerting system variables .
We’ve added new alerting system variable @alert.downtimeDuration which can be sent as part of the Ok message, indicating the alert is over, so the message can include information about how long the alert lasted: