fedex_active_shipping_example.rb

require 'rubygems'
require 'active_shipping'
include ActiveMerchant::Shipping

####### START: STORE THIS IN A CONFIG FILE
MyApp::Application.config.fedex_credentials = {
  account:  '1234567890',
  password: '1234567890abcdefgh1234567890',
  key:      '1234567890abcde',
  login:    '12345678'
}

MyApp::Application.config.fedex_origin_address = {
  country:     'CA',
  postal_code: 'T2J 1W9'
}
####### END STORE IN CONFIGS

fedex = FedEx.new( MyApp::Application.config.fedex_credentials )

packages = [

  Package.new(  7.86 * 16,           # ounces or lbs
                [ 33, 33, 1 ],       # inches
                :units => :imperial, # not grams, not centimetres
                :value => 100,
                :currency => "USD" )

]

origin = Location.new(:country => 'CA', :postal_code => 'V5N3B2')

destination = Location.new(:country => 'US', :postal_code => '90210')

response = fedex.find_rates(origin, destination, packages)

rates = response.rates.sort_by(&:price).collect {|rate| [rate.service_name, rate.price]}