Create a glossary with the rating options enabled (choose for example, aggregate rates and a numeric scale with a maximum of 100) Now as admin create a couple of entries Add the mod/glossary:rate capability to the student role Enrol a couple of students in the course As admin, enable "Mobile services": Plugins ► Web Services ► Mobile Create a Token for the student users: Click on Site administration ► Plugins ► Web services ► Manage tokens Next, you can do a CURL REST call simulating a WS client with the user. You need to replace the wstoken, instanceid with the glossary cmid, itemid is a entry id and the URL of your moodle instance curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'contextlevel=module&instanceid=293&component=mod_glossary&ratingarea=entry&itemid=16&scaleid=100&rateduserid=2&aggregation=5&rating=50&wsfunction=core_rating_add_rating&wstoken=ffbe3a3002f235bf9d01fd9369e10b66' | python -m "json.tool" Go to the web interface (as admin) and check that the rating was updated successfully, you can see in the glossary entry the correct rating (50) Now, using the other student token run the same curl command but replacing the rating to 100 As an admin check again the entry (reload) and verify that now the aggregate rating is 75 (100+50/2) and you can see the list of ratings for the element You can create a token for the admin and try to rate your own entry, you will get an error (you cannot rate your own items)