Note: Version number is bumped because a new web service is added into the Mobile app service. Enable completion at site level Create a course with a student, enable completion in the course settings. Create a couple of activities or resources, enable "Manually completion" for those activities Enable "Mobile services": Plugins ► Web Services ► Mobile Create a Token for the student : Click on Site administration ► Plugins ► Web services ► Manage tokens Next, you can do a couple of CURL REST call simulating a WS client with the student user . You need to replace the wstoken, cmid (activity cmid) and the URL of your moodle instance curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' -H 'Pragma: no-cache' -H 'Origin: file://' -H 'Accept-Encoding: gzip,deflate,sdch' -H 'Accept-Language: es,en;q=0.8,de-DE;q=0.6,de;q=0.4,nb;q=0.2' -H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1798.0 Safari/537.36' -H 'Content-Type: application/x-www-form-urlencoded; charset=UTF-8' -H 'Accept: application/json, text/javascript, */*; q=0.01' -H 'Cache-Control: no-cache' -H 'Connection: keep-alive' --data 'cmid=74&completed=1&wsfunction=core_completion_update_activity_completion_status_manually&wstoken=a70d553bbaf6d9b260a9e5c701b3c46e' --compressed Confirm that If you do a curl call with the parameter completed equal to 1 the activity is marked as complete in the course index for the user If you do a curl call with the parameter completed equal to 0 the activity is marked as incomplete in the course index for the user