A request XML packet retrieving subscription limits descriptors includes the get-limit-descriptor operation node:
<packet version="1.6.3.0">
<webspace>
<get-limit-descriptor>
...
</get-limit-descriptor>
</webspace>
</packet>
You can retrieve limits descriptor for the specified subscription (or multiple subscriptions specified by customer ID or login name), or the server-level subscription limits descriptor. The get-limit-descriptor node has the following graphical representation:

domain_input.xsd)..