Two formats are supported with the REST APIs: json and xml. Each request must include the format in the query string of the url (the default format is xml, so technically it is only required for json requests).
http://restapi.lucity.net/gbaMS/Work/WorkOrders.svc/?format=json
Returns data in json
http://restapi.lucity.net/gbaMS/Work/WorkOrders.svc/?format=xml or
http://restapi.lucity.net/gbaMS/Work/WorkOrders.svc/
Returns data in xml.
For posting and putting (creating and updating) data, the format must be included both in the query string
http://restapi.lucity.net/gbaMS/Work/WorkOrders.svc/?format=json
And in the Content-Type of the request header. The content type for json is "application/json" or "text/javascript" and the content type for xml is "text/xml".