As admin, enable "Mobile services": Site administration ► Mobile app ► Mobile settings Create a new course Turn editing on and add a new "file" resource in any section: In the "Select files" area of the new "file" resource being created include at least 3 different types of files: a pdf, a txt file and a html file Click on the html file and in the popup click on "Set main file" Save changes Enrol one user as student in the course Create a Token in the mobile app service for the user created in the previous step Click on Site administration ► Plugins ► Web services ► Manage tokens Open the console an execute this new curl request, replacing wstoken with the token you just created and the site url with yours and the courseid with the id of the course created in step 2 curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'courseid=2&wsfunction=core_course_get_contents&wstoken=3af67232a7596ceb658df4db329e5ad6' --compressed | python -m "json.tool" Now check that: You see a contents field listing all the 3 files you added The first file in the "contents" field is the HTML field You see a "contentsinfo" field with subfields: filescount set to 3, filessize indicating the total of the size of the 3 files, lastmodified indicating the bigger timemodified value of the 3 files and finally mimetypes listing first "text/html" and then the rest of the mimetypes (text/plain and application/pdf) Now, execute the following curl request doing the same replacements curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'courseid=2&wsfunction=core_course_get_contents&wstoken=3af67232a7596ceb658df4db329e5ad6&options [0] [name] =excludecontents&options [0] [value] =1' --compressed | python -m "json.tool" And check that you see the "contents" field empty but the "contentsinfo" field is populated with the same data that the previous request