As an admin, enable "Mobile services": Site administration ► Mobile app ► Mobile settings Create a new course Create a new assignment activity with its default configuration Enrol one user as student in the course Log-in into Moodle with the student account, access the assignment activity and do a submission Now, as admin again, create a Token in the mobile app service for the student user Click on Site administration ► Plugins ► Web services ► Manage tokens Open the console and execute this new curl request, replacing WSTOKEN with the token you just created and the SITE_URL with yours. The ASSING_ID value is the id of the assignment created in step 3 in the database (mod_assign table) curl 'SITE_URL/webservice/rest/server.php?moodlewsrestformat=json&wsfunction=mod_assign_list_participants' --data 'assignid=ASSIGN_ID&groupid=0&filter=&moodlewssettingfilter=true&moodlewssettingfileurl=true&moodlewssettinglang=en&wsfunction=mod_assign_list_participants&wstoken=WSTOKEN' --compressed Confirm that: In the curl request response you see listed the fullname of student that did the submission, including also a submissionstatus field that this not empty (should be submitted)