While working with the service, we often face the error : "meta data not accessible in the web service or Failure to invoke the service due meta data inaccessiblity" . Add the below code in web.config : <services> <service name="SyncFalconService.SyncFalcon" behaviorConfiguration="metadataBehavior"> <endpoint address="" binding="wsHttpBinding" contract="SyncFalconService.ISyncFalcon"/> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/> </service> </services>