Is it a namespace issue?
Try here
https://answers.splunk.com/answers/146985/how-to-view-list-of-email-addresses-for-saved-alerts.html
You need to use namespace wildcards to get all the searches (run as admin), I've added a filter to only load searches that have the email action enabled:
| rest /servicesNS/-/-/saved/searches search="action.email=1" | table title eai:acl.app eai:acl.owner disabled is_scheduled cron_schedule action.email*
I also found these pages helpful
http://docs.splunk.com/Documentation/Splunk/6.0.2/RESTAPI/RESTsearch
http://docs.splunk.com/Documentation/Splunk/6.2.2/RESTREF/RESTsearchExamples
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