Wanted to see if there were any updates to this topic in June of 2018.
I found this link that gives some instructions on how to install a plugin via the UPM API, and had a question (for context, I'm trying to see if I can install a custom Jira plugin):
After obtaining the UPM token, the instructions say to make a POST request, where the "pluginUri" property is set to "the hosted location of your descriptor file." What are the limitations to this pluginUri property? Does it have to be on the same host machine as the running Jira instance? Or can the URI point to a separate machine (ie, our Artifactory instance, or a Github repo)?