ajax call with SharePoint REST API to get JSON response

Question

I am trying to GET list items from SharePoint 2013 using REST API and ajax call.It is returning by default ATOM+XML. I want the response in JSON format. I tried the following however still same XML format response:

"/_api/lists/getbytitle(ListName)/Items/?$filter=lookupName/LookupNameInSourceListName eq 'col_Name'&                   $select=LinkTitle,Image,lookupName/LookupNameInSourceListName&$expand=lookupName/LookupNameInSourceListName&$orderby=TabOrder asc"

 $.ajax({
        url: url,
        method: "GET",
        headers: { "Accept": "application/json; odata=verbose" },
        success: function (data) {
            success(data);
        },
        error: function (data) {
            failure(data);
        }
    });

Answer 1

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     }
});

Answer 2

Add to your header:

"Content-Type": "application/json;odata=verbose"

Answer 3

Although already answered, the below worked too :

request.Accept = "application/json;odata=verbose";
request.ContentType = "application/json;odata=verbose";