var PayPal = require('paypal-classic-api');

var credentials = {
  username: 'julepka-seller_api1.gmail.com',
  password: 'Q6NNSHNZMWHAA4A9',
  signature: 'AhvoYqOIPzW4GW8nYIQp-A5Z412KAgc9M0oqrD6mIfDQWfrP6eVaq3JH'
};

var paypal = new PayPal(credentials);

paypal.call('TransactionSearch', { StartDate: '2015-01-28T02:27:44.681Z'}, function(error, transactions) {
  return console.log(transactions);
});