Hi,
Follow all steps of this page :
http://localhost/admin/settings.php?section=webservicesoverview
And try an url like that :
https://localhost/webservice/rest/server.php?moodlewsrestformat=json&courseid=4&userid=106&wsfunction=core_completion_get_course_completion_status&wstoken=ffbe3a3002f235bf9d01fd9369e10b66
Dominique.
Follow all steps of this page :
http://localhost/admin/settings.php?section=webservicesoverview
And try an url like that :
https://localhost/webservice/rest/server.php?moodlewsrestformat=json&courseid=4&userid=106&wsfunction=core_completion_get_course_completion_status&wstoken=ffbe3a3002f235bf9d01fd9369e10b66
Dominique.