Get USDT-BTC on Slack using Google Script

Main.gs

function main() {
  // Insert here your WebHook URL obtained from Slack and the name of the channel
  var slack_webhook_url = 'https://hooks.slack.com/services/XXXXXXXXX/XXXXXXXXXX/XXXXXXXXXXXXXXX';
  var slack_channel_name = 'XXXXXXX';
  
  var bittrex_url = 'https://bittrex.com/api/v1.1/public/getticker?market=USDT-BTC';
  var url_response = UrlFetchApp.fetch(bittrex_url).getContentText();
  var response_parsed = JSON.parse(url_response); 
  var last_usdt_btc = parseInt(response_parsed.result.Last);
  send('*USDT-BTC* --> ' + last_usdt_btc, slack_channel_name);
}

function send(message, slack_channel) {
  var payload = {
    "channel" : slack_channel,
    "username" : "robot",
    "text" : message,
    "icon_emoji": ":robot_face:"
  }
  var options =  {
    "method" : "post",
    "contentType" : "application/json",
    "payload" : JSON.stringify(payload)
  };
  
  // Insert here your WebHook URL obtained from Slack
  return UrlFetchApp.fetch(slack_webhook_url, options)
}