Converting curl cmd to jQuery $.ajax()
By default $.ajax() will convert data to a query string, if not already a string, since data here is an object, change the data to a string and then set processData: false, so that it is not converted to query string.
$.ajax({ url: "http://www.example.com/api", beforeSend: function(xhr) { xhr.setRequestHeader("Authorization", "Basic " + btoa("username:password")); }, type: 'POST', dataType: 'json', contentType: 'application/json', processData: false, data: '{"foo":"bar"}', success: function (data) { alert(JSON.stringify(data)); }, error: function(){ alert("Cannot get data"); }});