Create a course with a student. The course must have at least one section. As admin, enable "Mobile services": Plugins ► Web Services ► Mobile Create a Token for the student user. Click on Site administration ► Plugins ► Web services ► Manage tokens Take note of the student token (to be used in following instructions). Create one wiki and add a page with the following HTML code (take note of the generated pageid): <h1>Title1</h1>Text inside section <h1>Title2</h1>Text inside section Next, you can do a CURL REST call simulating a WS client with the student user. You need to replace the wstoken, pageid and the URL of your moodle instance. curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'wsfunction=mod_wiki_get_page_for_editing&pageid=1&wstoken=cd2be328e7db5fefa407274d1e1073a7' --compressed Confirm that you receive the same content provided to create that page. Confirm that the contentformat and version (number of edits, usually 1) is the same you provided. Now perform the request again but specifying the lockonly parameter. You need to replace the wstoken, pageid and the URL of your moodle instance. curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'wsfunction=mod_wiki_get_page_for_editing&pageid=1&lockonly=1&wstoken=cd2be328e7db5fefa407274d1e1073a7' --compressed Confirm that you receive ONLY the current version number and not the content nor contentformat.