const easyship = require('easyship')('<ACCESS_TOKEN>');
 
  easyship.rate.create({
    origin_postal_code: '60605',
    destination_country_alpha2: 'US',
    destination_postal_code: '60605',
    taxes_duties_paid_by: 'Sender',
    is_insured: false,
    apply_shipping_rules: true,
    items: [{
      actual_weight: 1.2,
      height: 10,
      width: 15,
      length: 20,
      category: 'mobiles',
      declared_currency: 'SGD',
      declared_customs_value: 100,
    }],
  }).then(({ rates }) => {
    console.log(rates);
  });