Create a new course with a couple of assignment activities. Configure one of the activities to not display always the description, configure this activity to be available in a year (submission from date). This means that the activity description will not be showed to the user until the next year. In the other activity, add a couple of attachments for the description. Enable "Mobile services": Plugins ► Web Services ► Mobile Create a Token for the user (student) your are going to test with: Click on Site administration ► Plugins ► Web services ► Manage tokens Click add, select user and service (Mobile Service) Next, you can do a CURL REST call simulating a WS client: You need to replace the wstoken and the URL of your moodle instance and the course id curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' -H 'Pragma: no-cache' -H 'Origin: file://' -H 'Accept-Encoding: gzip,deflate,sdch' -H 'Accept-Language: es,en;q=0.8,de-DE;q=0.6,de;q=0.4,nb;q=0.2' -H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1798.0 Safari/537.36' -H 'Content-Type: application/x-www-form-urlencoded; charset=UTF-8' -H 'Accept: application/json, text/javascript, */*; q=0.01' -H 'Cache-Control: no-cache' -H 'Cookie: MoodleSession=hs46mckao127eh1655cdq4fqn0' -H 'Connection: keep-alive' --data 'courseids%5B0%5D=4&wsfunction=mod_assign_get_assignments&wstoken=1b9b8bd8d01acbf452c2bd77ca0d2925' --compressed Confirm that: You receive a list of courses with the two assignments. One of the assignments (the one you configured to not display allways the description) does not display the intro and introformat fields. The other assignment displays the description and a list of attached files