How to add more mnet service using moodle site base

Currently, moodle support 4 mnet services 1. Remote enrolment service 2. Portfolio services 3. SSO (Identity Provider) 4. SSO (Service Provider) to add more mnet service, I need to manually add code for admin/mnet/service.php and then add new in mnet/service (like existing service mnetservice_enrol). I intent to add new service for retrive course detail information from mnet peer. get_remote_courses method is return course overview only not course detail. I can not find any document about this is moodle offical site. Is there any toturial about this? or some advise from expert?