We are using Opsgenie to handle all our alerts. There is no native
integration, so we use actions based on webhooks. We run a Lambda
every hour to set the correct action to each monitor.
The problem here is that there is always a period of maximum one
hour, where no action is attached to a newly created monitor, so no
alerts will be sent during that period.
A simple solution would be to allow a default action to be
configured in the DEFAULT Notification Profile. That way an action is
always attached and we will always be notified.