Create two feedback activities. One with the default settings including some images in the description, another one with the default settings but not visible. Enable "Mobile services": Plugins ► Web Services ► Mobile Create a Token for one teacher and one student enrolled in the course: 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 teacher and the student user . You need to replace the wstoken, courseid and the URL of your moodle instance curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'courseids%5B0%5D=18&wsfunction=mod_feedback_get_feedbacks_by_courses&wstoken=12a2a65aeea2a177055e233f9e303218&moodlewssettingfilter=true' | python -m "json.tool" Confirm that As student you don't see the non-visible feedback but you see the other one. You can see the basic fields like, id, course, coursemodule, autonumbering, intro, introformat, introfiles (listing the images in the feedback description), completionsubmit, page_after_submitformat, publish_stats As a teacher you see all the feedbacks including extra information like anonymous, email_notification, site_after_submit, page_after_submit, timeopen, timeclose, timemodified, pageaftersubmitfiles