How to use OAuth with impersonation with the REST API to leave a comment?

[Jackson Roberts]

Hi Atlassian Community,

I am currently developing an in-house product for Jira Server and have successfully built-out OAuth authentication, and can retrieve and create new issues.

At the moment, I can create issues on behalf of another user by setting the reporter with the `raiseOnBehalfOf` parameter, but I cannot do the same for comments. I would like to be able to impersonate an arbitrary user by their email and leave a comment as them. How would I implement this?

[Angélica Luz]

Hello Jackson,

Welcome to Atlassian Community!
Currently, it's not possible to add a comment on behalf of other user using API. We have a feature request suggesting the implementation of this ability:
- https://jira.atlassian.com/browse/JRASERVER-35124
Please, click on vote and watch in order to hear about updates on the development cycle.

Regards,
Angélica