Note: Version number is bumped because a new web service is added into the Mobile app service. Create a course with the enablegrades option enabled. Access with a teacher account to the course in Moodle, go to Administration / grades / View user report As a teacher or admin, check that in the Report / Logs you see the "Grade user report viewed" actions. As admin, enable "Mobile services": Plugins ► Web Services ► External services Create a Token for a student user (not admin) in the course (create a token for a course teacher or admin too): Click on Site administration ► Plugins ► Web services ► Manage tokens Next, you can do a CURL REST call simulating a WS client with the student user . You need to replace the wstoken, courseid and the URL of your moodle instance curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'courseid=4&userid=0&wsfunction=gradereport_user_view_grade_report&wstoken=a70d553bbaf6d9b260a9e5c701b3c46e' Confirm that You can see new entries in the course log (Grade user report viewed) for that course and the user. The origin for the new log entries is "ws" If you change userid to a different user, you will get a no permissions to view grades error If you change courseid to an non-existent course you got an error If you change courseid to a course where you are not enrolled you got an error Now replace the token with a teacher or admin one, and then replace userid to a valid user. Then you should see in the course log table new events (Grade user report viewed) with the specified user as affected