[Zope] How can you tell it's XMLRPC ?

Is there a way to distinguish whether a request was made from a browser (no, not a particular browser) or from XMLRPC ? I would like to be able to tailor my responses to rpc requests so that I don't get a whole web page sent back when a value would do. Particularly, object creation code usually refers back to the management page of it's container, which isn't the response I want for rpc, success or failure would be preferable. Also, when Zope has a fault on XMLRPC, should it be sending back that big 'Zope Error....' message, according to the XMLRPC spec? J. Toman