SOAP
In this section you will learn how to:
•Validate SOAP messages against WSDL. SOAP messages can be checked for validity not only against the SOAP specification but as well as against any XML Schemas referenced in the corresponding WSDL definition
•Send and receive SOAP requests using the SOAP Debugger
•Set breakpoints for sending and receiving SOAP requests
•Edit an incorrect SOAP request before sending it on to the web service
Altova website: 
SOAP Debugger