How to Add Service Select File\Add Service or right-click My Service Projects and select Add Service. WCF Test Client displays Add Service dialog with "Please enter endpoint address". To get and enter the endpoint address: Look in the service's Web.Config. Find ServiceModel\Client section. Find aendpoint element and address attribute. Copy address and add "?wsdl" If your service address is https://localhost:1024/StockPriceService then append "?wsdl" to get https://localhost:1024/StockPriceService?wsdl. Paste the above address into the Add Service dialog. Click OK.