Bump your /version.php file to force Moodle to reload the Mobile service Create a course with a one student Create a mod_quiz activity with one numerical question Go to Site administration ▶︎ Plugins ▶︎ Activity modules ▶︎ Quiz and set the Auto-save delay to 0 seconds Enable "Mobile services": Plugins ► Web Services ► Mobile Create a Token for the student Click on Site administration ► Plugins ► Web services ► Manage tokens Now, as the student, open in Moodle the quiz and start and attempt (please, do not answer any question) With the inspect tool, display all the form fields in the question, and replace the q15:3_answer names and values of the following command with the correct name and values from the form (you need to replace the following elements: name, sequencecheck and q : _answer for the q :*_answer use as value for example 5) Replace the wstoken and attemptid (and your site URL) and execute the following curl command curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'attemptid=15&wsfunction=mod_quiz_save_attempt&wstoken=ffbe3a3002f235bf9d01fd9369e10b66&data%5B0%5D%5Bname%5D=slots&data%5B0%5D%5Bvalue%5D=3&data%5B1%5D%5Bname%5D=q15:3_:sequencecheck&data%5B1%5D%5Bvalue%5D=1&data%5B2%5D%5Bname%5D=q15:3_answer&data%5B2%5D%5Bvalue%5D=5' Confirm that you see a response containing status equal to true Now, reload the question page in Moodle, you should see now that the question is marked as saved with the value you used (the suggested was 5)