JIRA REST API How to get Projectkey over the username/Projectname

Question

Hello together, i would like to automate some processes with the JIRA REST API and now i need to find out some projectkeys. Is it possible to get all Projectkeys from the projects a user is in over the Username or the Projecktname? Or is there a Quick solution to list all Projectkeys/ids where the user is Projectlead of? I've found a method to find the projectkey by projectname : https:///rest/api/latest/search?jql=project="" But this request would be to unperformant - too much results...

WITTE · Answer

I think this wouldn't help me by my issue, because i would like to list up all projects of one specific user and not all projects of my jira instance.

Background :

I would like to check if the user is projectlead in one of his projects and write it out.

Warren_mz9b4z · Answer

Okay, so can't you then use /rest/api/2/project from here which seems to be the server equivalent?

WITTE · Answer

we're not using the cloud version, so unfortunately i can't check this option.... (api version). But thanks for answer.