In Jira, if we have to query nested fields such as Project Key/ Name/ Id in the incidents resource, we need to query the project field directly which is an advanced search field.
In the below sample payload, project key is TP, if we need to get list of incidents with Project Key : TP then we can directly query Get /incidents with Where clause project='TP'
Here is the snapshot for reference :
For more information, see the JIRA documentation on the Advanced search field querying.
