We've got a new implementation of the xmlrpc server landing in Integration today:
All going well, that will make it moodle.git (and download packages) by the end of this week. It would be extremely helpful to have third-party clients tested against this new implementation so we can iron out potential any issues before this implementation is eventually be released as part of Moodle 3.1 in May.
So if you've got a xmlrpc client, if you are able to test against this weeks integration or in the coming weeks - it would be appreciated. Thanks!