Do you use the right service in SharePoint 2013

In SharePoint 2010, you can use SharePoint service  /_vti_bin/listdata.svc to access data in SharePoint list, but in SharePoint 2013,  /_vti_bin/listdata.svc has been officially deprecated.

The new service in SharePoint 2013 is  /server/site/_api/web/lists/getbytitle('listname')

Read more about it on Determine SharePoint REST service endpoint URIs