Create a course with a student, the course must have at least one section. Enable completion at site level and course level. Create a mod_assign activity using as completion criteria "Student must view this activity to complete it" As admin, enable "Mobile services": Plugins ► Web Services ► Mobile Create a Token for the student user 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, assignid (the assign instance value) and the URL of your moodle instance curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'assignid=2&wsfunction=mod_assign_view_assign&wstoken=ffbe3a3002f235bf9d01fd9369e10b66' --compressed Confirm that If you access via the web interface you will see the activity marked as completed NOTE: If you don't see the activity marked as completed you should logout and login again, Moodle session cache sometimes does not upgrade the completion status for activities.