query.Accept header to application/sparql-results+xml to get results in XML. Set it to application/sparql-results+json to get results in JSON.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.curl --location --request GET '//api.aucklandmuseum.com/sparql?query='{}