http://developers.de/blogs/damir_dobric/archive/2007/04/17/Writing-custom-WsdlImportExtension.aspxHere is an example which shows how to implement IWsdlImportExtension , which imports the custom JMS address from the port type. This example shows how to: Recognize custom address which is not SOAP prefixed Read required custom attributes from the addressenCommunityServer 2008 SP1 (Build: 30619.63)