Once the Job ID for the job to be deleted has been identified from the Jobs URL, it can be terminated by running the following URL API for "delete":
http://<servername>:<port>/<servicename>/api/v8/administration/delete?jobId=<JobID>
or for example, to remove job 25 which appears to have hung in the "RUNNING" state for many hours:
http://myTSSS:8080/SplusServer/api/v8/administration/delete?jobId=25
Note: In the example URL, the servername, port, and servicename must be modified to match your installation. The URL is case sensitive. <JobID> must be replaced with actual Job ID of the job to be terminated as identified on the jobs URL.
In the above example, Job ID 25 will get deleted permanently. The next time you send a request for jobs to /api/v8/jobs, the deleted job should not appear on the list. If it still appears, refresh your browser to clear the cache.