In Pager Duty:
Login to your account in Pager Duty. Click Configuration, Then Services:
Click Add New Service.
In the Integration Settings section choose Use our API directly as the Integration Type, and choose Events API v2 in the drop-down.
After completing the form and saving, you will be taken to the new service details page. Copy the displayed Integration Key:
In the Loom web-application:
Go to Settings and select Integrations, then PagerDuty:
Enter the Integration Key and click Save.
That's it. Go to Settings, then Notifications, and create subscriptions that send incidents to PagerDuty.