OINO.cloud APIs support the standard HTTP headers for specifying content types, Content-Type for the POST/PUT request body and Accept for GET response data.
                        For example if you just add a form to your HTML page it will correctly set Content-Type as application/x-www-form-urlencoded and Accept as text/html to get the API response as HTML.
                        These headers can be overridden by the oinorequesttype and oinoresponsetype query parameters in the request URL for example if you want data in specific format.
                    
The following content types are supported:
null as an SQL null-value.