WebHttpRelayBinding Class

public class WebHttpRelayBinding : Binding, 
	IBindingRuntimePreferences

<system.serviceModel>
  <bindings>
    <!-- Application Binding -->
    <webHttpRelayBinding>
      <binding name="customBinding">
        <!-- Turn off client authentication so that client does not need to present credential through browser or fiddler -->
        <security relayClientAuthenticationType="None" />
      </binding>
    </webHttpRelayBinding>
  </bindings>

  <services>
    <!-- Application Service -->
    <service name="Microsoft.ServiceBus.Samples.ImageService">
      <endpoint name="RelayEndpoint"
                contract="Microsoft.ServiceBus.Samples.IImageContract"
                binding="webHttpRelayBinding"
                bindingConfiguration="customBinding"
                behaviorConfiguration="sharedSecretClientCredentials"
                address="" />
    </service>
  </services>

  <behaviors>
    <!-- Specify service and endpoint behaviors here. -->
  </behaviors>

</system.serviceModel>

// Configure the credentials for the service and client endpoints through an endpoint behavior.
TransportClientEndpointBehavior relayCredentials = new TransportClientEndpointBehavior();
relayCredentials.CredentialType = TransportClientCredentialType.SharedSecret;
relayCredentials.Credentials.SharedSecret.IssuerName = issuerName;
relayCredentials.Credentials.SharedSecret.IssuerSecret = issuerSecret;

// Create the binding with custom settings.
WebHttpRelayBinding binding = new WebHttpRelayBinding();
binding.Security.RelayClientAuthenticationType = RelayClientAuthenticationType.None;

// Get the service URI.
Uri address = ServiceBusEnvironment.CreateServiceUri("https", serviceNamespace, "Image");

// Create the web service host.
WebServiceHost host = new WebServiceHost(typeof(ImageService), address);
// Add the service endpoint with the WebHttpRelayBinding binding.
host.AddServiceEndpoint(typeof(IImageContract), binding, address);
// Add the credentials through the endpoint behavior.
host.Description.Endpoints[0].Behaviors.Add(relayCredentials);
// Start the service.
host.Open();

Console.WriteLine("Copy the following address into a browser to see the image: ");
Console.WriteLine(address + "GetImage");
Console.WriteLine();
Console.WriteLine("Press [Enter] to exit");
Console.ReadLine();

host.Close();