Does anyone know of an easy way (i.e. without setting up my own SOAP server) to view the content of outbound messages from workflow?

The admins at a third-party endpoint claim that the message is coming through but without one of the selected fields. I need to be able to test that without having to email them every time and ask "did it work this time?"

Is there a way I can send it to my sandbox's endpoint an see the content? Any free endpoints out on the WWW (I looked with no luck)?

Thanks for any help,