Q: Is netTcpBinding supported?
A: Yes. WCFStorm needs to access and analyze the WSDL in order for it to dynamically invoke the service. If you don't have a local copy of the wsdl, a mexHttpBinding must be added to the service.
Please have a look at http://www.wcfstorm.com/wcf/getting-started.aspx. At step #4, it shows that it's invoking the service using netTcpBinding