wm.server.access:groupAdd this must do it for you. Also explore the services in WmRoot (wm.server.access). Please not that the services in WmRoot are internal to webMethods and you must use it at your own risk.
To access the WmRoot package in designer add the extended setting watt.server.ns.hideWmRoot=false on IS. And just note that server restart is not required.
Any questions?
#Integration-Server-and-ESB#webMethods