I've not tried pager duty but I have done Slack. If PagerDuty has a webhook or other web interface, it should be easy enough to create a script that calls it. You may want to start here:
https://developer.pagerduty.com/documentation/howto/integration-tutorial?
=G=
From: Eli <user-eeb3a3c6c848@xymon.invalid>
Sent: Saturday, September 26, 2015 12:15 AM
To: xymon at xymon.com
Subject: Xymon alert to pagerduty
Hello,
Is there any one tried forward/integrate xymon alert to pagerduty?
Thanks
Sent from my Verizon Wireless 4G LTE DROID