To create an Opsgenie alert from Jira Data Center, it's possible with

• send a HTTP request to the Opsgenie API via Automation for Jira
• webhook triggered on issue created and updated events

It's also possible to trigger the webhook via post function in Jira Data Center. However, the alert will not be created despite the webhook is delivered due to workflow transitions not being supported. The message indicating so can be seen in the Opsgenie log.

It'd be great to have this integration supported.