Read all available permissions via API/REST
Accepted answer
Following HTTP GET calls will provide you a list of all available permissions:
https://<server>:<port>/ccm/service/com.ibm.team.process.internal.service.web.IProcessWebUIService/permissionExtensions?context=1&processAreaItemId=<process-area-uuid>
https://<server>:<port>/ccm/service/com.ibm.team.process.internal.service.web.IProcessWebUIService/permissionExtensions?context=2&processAreaItemId=<process-area-uuid>