1. Function
The incident management platform VictorOps handles the distribution of messages from dozens of different sources, which can be selected as integrations directly in the web interface. A generic REST backend is available for Checkmk.
2. Configuring VictorOps
You do not need to explicitly activate the notifications from Checkmk, only the REST endpoint address:
In VictorOps under Integrations, call the REST Generic item.
Copy the displayed REST endpoint URL.
3. Configuration in Checkmk
You have already learned how to set up Checkmk notifications in general in the article about notifications. In Checkmk you only need now to specify this key:
For the Notification Method choose VictorOps.
Enter the copied URL under VictorOPS REST Endpoint.

For testing you can use the Fake check results and Custom notification commands.