|rest /services/search/jobs|search isRealTimeSearch=1 to see if that gets you what you need.
http://docs.splunk.com/Documentation/Splunk/4.3.6/RESTAPI/RESTsearch#GET_search.2Fjobs documentation to know what fields you might want
I have this running as an alert to let me know who is running rt searches, and how long for
| rest /services/search/jobs | search eventSorting=realtime | table label, author, dispatchState, eai:acl.owner, label, isRealTimeSearch, performance.dispatch.stream.local.duration_secs, runDuration, searchProviders, splunk_server, title
According to the documentation below, there is not an option for eventSorting=realtime.
Indicates if the events of this search are sorted, and in which order.
asc = ascending;
desc = descending;
none = not sorted
Would the actual setting to be used be isRealTimeSearch?