Ajax function inside ajaxStop function

I need to use ajaxStop function to call an ajax to render new html element, but after the ajax function finsihed it the ajax repeat itself over and over again, i just need to run this ajax once inside the ajaxStop function. jQuery code:

$(document).ajaxStop(function () {
          $.ajax({
              type: 'post',
              url: url.build('test/payment/getmethod'),
              cache: false,
              showLoader: true,
              method: "POST",
              success: function(data) {
                if(data!='') {
                  var htm ='';
                  htm += '<div class="payment-method-billing-address">';
                  $.each(data , function(i, method) {
                    htm +=  '<input type="radio" class="required" name="snap-method"  value='+method.value+'">'+method.label+'<br>';
                  });
                  htm +=  '</div>';
                  $( htm ).insertBefore( ".checkout-agreements-block" );
                }
                return false;
              }
          })
          return false;
 });