We built some software that would communicate with the Virtualmin API to gather information about the websites we are hosting on the server (the specifics above are only for a legacy server that we administer, most are much more up to date).
The software retrieves the data from the API no problem. We want to be able to at least show what the overall useage is on the server (preferably also per virtual server) in terms of HDD, CPU and bandwidth but the only useage figure we seem to be retrieving by list-domains is the values for the size of the database.
rolls eyes my fault I left myself open for that by posting an old server (despite mentioning it was only a legacy server). I have updated the details to a more relevant server.