You can execute your queries against this endpoint.
The sparql query should be provided as the value of the request parameter query.
Set the Accept header to application/sparql-results+xml to get results in XML. Set it to application/sparql-results+json to get results in JSON.
Note: This endpoints supports . In order to get a JSON-P response, set the query parameter callback to your preferred callback function name. The default function name is callback(). When using JSON-P, there is no need to set the Accept header because the response will always be in application/javascript.