var settings = {
  "async": true,
  "crossDomain": true,
  "url": "https://api.vaspro.co.ke/v3/BulkSMS/bulk/create",
  "method": "POST",
  "headers": {
    "cache-control": "no-cache",
  },
  "data": "{
        "apiKey": "api token here",
        "shortCode": "VasPro",
        "origin": "API_INTERFACE",
        "isScheduled": ,
        "scheduleDate":
        "scheduleTime": ,
        "uniqueId": "12347",
        "enqueue": 1,
        "message": ""
        "contacts":
            {"recipients": "07xxxxxxxx,07xxxxxxx"},
        "callbackURL": "http://vaspro.co.ke/dlr"
    }"
}

$.ajax(settings).done(function (response) {
  console.log(response);
});