WCF Service Client: The content type text/html; charset=utf-8 of the response message does not match the content type of the binding

Try browsing to http://localhost/ScraperService.svc in the web browser on the server hosting the service, using the same Windows credentials that the client normally runs under.

I imagine that IIS is displaying an html error message of some description instead of returning xml as expected.

This also can occur when you have an http proxy server that performs internet filtering. My experience with ContentKeeper is that it intercepts any http/https traffic and blocks it as "Unmanaged Content" - all we get back is an html error message. To avoid this, you can add proxy server exception rules to Internet Explorer so that the proxy doesn't intercept traffic to your site:

Control Panel > Internet Options > Connections > LAN Settings > Advanced > Proxy Settings

I had a similar issue. I resolved it by changing

<basicHttpBinding>

to

<basicHttpsBinding>

and also changed my URL to use https:// instead of http://.

Also in <endpoint> node, change

binding="basicHttpBinding" 

to

binding="basicHttpsBinding"

This worked.

An HTML response from the web server normally indicates that an error page has been served instead of the response from the WCF service. My first suggestion would be to check that the user you're running the WCF client under has access to the resource.