The StrandVision API supports responses as either XML or JSON data formats. The response format is specified by passing the x-apiResponse field or using the content-type and accept HTTP headers. If no valid format is specified, JSON is automatically selected.
If you are manually testing, most web browsers will auto select XML due to the accept headers that are sent. Append &x-apiResponse=JSON to the end of the web url to force a JSON result to be returned.