Sharepoint - ajax call with SharePoint REST API to get JSON response

Thanks for the answer: i tried no luck.

This one worked for me:

$.ajax({
    url: Url,
    method: 'GET',
    beforeSend: function (XMLHttpRequest) {                     
        XMLHttpRequest.setRequestHeader("Accept", "application/json; odata=verbose");
    },              
    cache: true,
    error: function (data) {                    ////failure     },              
    success: function (data) {                  ////success     }
});