Prepare a site with many users. Ideally you will want a few hundreds of users with predictable username (e.g. user1, user2, user3, ...) and identical password for them all. You can use the attached Users.csv and load them from Admin -> Users -> Upload users". Log in as the site admin Enable web services under Site administration > Advanced features Enable web services for mobile devices under Site administration > Mobile app > Mobile settings Generate mobile app tokens for all the users via the login/token.php script. This can be performed by visiting URLs like http://your.moodle.org/login/token.php?username=...&password=...&service=moodle_mobile_app with the username and password values provided. Tip: You may want to use some CLI script to perform this for you via the curl or so, e.g.: for i in $(seq 1 150); do curl "http://your.moodle.org/login/token.php?username=user${i}&password=pass&service=moodle_mobile_app"; done Check that you can navigate to the web services management under the site administration > server Go to Site administration Server > Web services > External services Add a new service called "Cohorts management", leave the "Authorised users only" unchecked. Add a few external functions (such as those with the "cohort" substring in their name) to this new external service. Go to the Manage tokens page Click the "Create token" button Check that you can search the user for which you want to create a token Create a few tokens for some users allowing them to use the Cohorts management service Check that you can use the filter at the Manage tokens page to filter the displayed tokens