Setup Log in as an admin Go to Site administration / Courses / Course custom fields Click " Add a new category " Confirm that a new category "Other fields" is added. Click " Add a new custom field " Add 3 short text custom fields with different visidbilities. Create a course and set values for the custom fields Enrol a student and a teacher Enable "Mobile services": Site administration ► Mobile app ► Mobile settings Create web service tokens for the teacher and the student. Click on Site administration ► Plugins ► Web services ► Manage tokens Student Open the console an execute this new curl request, replacing YOUR_WS_TOKEN with the token you just created for the student and the YOUR_MOODLE_URL. curl ' [YOUR_MOODLE_URL] /webservice/rest/server.php?moodlewsrestformat=json' --data 'wsfunction=core_course_get_courses_by_field&wstoken= [YOUR_WS_TOKEN] ' --compressed | python -m json.tool Confirm that you receive the list of courses, including the course with the customfields you added, with the value, name, type of field and shortname of the field. Confirm that you can only see the custom field data that is visible to everyone under the " customfields " section. Confirm that you don't see the custom field data for the teachers and the one not visible for anybody. Teacher Open the console an execute this new curl request, replacing YOUR_WS_TOKEN with the token you just created for the teacher and the YOUR_MOODLE_URL. curl ' [YOUR_MOODLE_URL] /webservice/rest/server.php?moodlewsrestformat=json' --data 'wsfunction=core_course_get_courses_by_field&wstoken= [YOUR_WS_TOKEN] ' --compressed | python -m json.tool Confirm that you receive the list of courses, including the course with the customfields you added, with the value, name, type of field and shortname of the field. Confirm that you can only see the custom field data that are visible to everyone and teachers only under the " customfields " section. Confirm that you don't see the custom field data that is not visible for anybody.