add_x_y_2.py

function add_x_y() {
  var sheet = SpreadsheetApp.getActiveSheet();
  var x = sheet.getRange(2,1); 
  var y = sheet.getRange(2,2); 
  data = {"x": x.getValue(), "y": y.getValue()};
  
  var URL = "https://us-central1-mw-automl-first-look.cloudfunctions.net/tutorial"   //< Add your URL 
  var options = {
    'method' : 'post',
    'contentType': 'application/json',
    // Convert the JavaScript object to a JSON string.
    'payload' : JSON.stringify(data)
  };
  return UrlFetchApp.fetch(URL, options).getContentText();
}