WCF configuration metadata exchange and help page endpoint

Question

I had add help page endpoint as in an example on MSDN and my metadata exchange endpoint stop work. Here exception details when i try to see metadata http://imgur.com/delete/HYe9c9OocABgxOj Without it all works great but i need to attach help page

<system.serviceModel>       
    <services>
        <service behaviorConfiguration="MyServiceBehaviors" name="GoalTracker.WcfRestService.Service1">
            <endpoint address="mex" binding="mexHttpBinding" contract="GoalTracker.WcfRestService.IService1" />

            <endpoint address="" binding="webHttpBinding" contract="GoalTracker.WcfRestService.IService1" />
            <endpoint address="Help" kind="webHttpEndpoint"
                behaviorConfiguration="RESTEndpointBehavior"
                contract="GoalTracker.WcfRestService.IService1" />
        </service>

    </services>
    <behaviors>
        <serviceBehaviors>
            <behavior name="MyServiceBehaviors">
                <!-- Add the following element to your service behavior configuration. -->
                <serviceMetadata httpGetEnabled="true" />
                <serviceDebug includeExceptionDetailInFaults="True"
                              httpHelpPageEnabled="True"/>
            </behavior>
        </serviceBehaviors>          
        <endpointBehaviors>
            <behavior name="RESTEndpointBehavior">
                <webHttp helpEnabled="true"/>
            </behavior>
        </endpointBehaviors>
    </behaviors>       
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
</system.serviceModel>

Answer 1

Contract on your mex endpoint should be IMetadataExchange However, I am not sure why you need mex endpoint as your service is REST based.

By setting helpEnabled="true" in the endpoint behavior, the help page will be automatically enabled. You don't need to add another endpoint with "Help" address. Please remove that endpoint.

Set the kind="webHttpEndpoint" and behaviorConfiguration="RESTEndpointBehavior" on the main endpoint where address="".

So it should look like this:

<service behaviorConfiguration="MyServiceBehaviors" name="GoalTracker.WcfRestService.Service1">

        <endpoint address="" kind="webHttpEndpoint"
            behaviorConfiguration="RESTEndpointBehavior"
            contract="GoalTracker.WcfRestService.IService1" />

</service>