Web services

Hello,

i try do code a simple webservice to check a users capabilitys from an extern server.
my webservice parameter s would be something like "userid", "courseid" and "capability".
all i want is a TRUE of FALSE but the accesslib need config.... needs... starts session and so
on.

is there a way to get this information without cluttering the session dir with unused guest sessions?

any hint will be greatly welcome!

best Regards,
Sven T.