Small wrapper around Savon for using FedEx Web Services. It will expose you to all the nitty gritty details from the FedEx API.


  • The FedEx API is big and complex
  • It's not easy to get started


  • You can do everything that is allowed by the API.
  • The code is really close to the documentation by FedEx.

It's up to you to decide which approach to take. If you don't do many special things, a gem like fedex, might be a better alternative, because it hides most of the complexity. If you find yourself needing a bit more control, you can take this gem.

Note: This gem is not complete. It contains the ship service, address validation and rate service. The other services FedEx supplies are a somewhat different. It shouldn't be too difficult to support them, but I haven't gotten around to it.


Add this line to your application's Gemfile:

gem 'fex'

And then execute:

$ bundle

Or install it yourself as:

$ gem install fex


Create a client with your credentials:

client = Fex.client(

  # required:

  credentials: {
    key:             "xxx",
    password:        "xxx",
    account_number:  "xxx",
    meter_number:    "xxx",

  # optional:
  mode: "test", # or "production"

  # see Savon for more information about these
  client: {
    logger:        Rails.logger,
    log_level:     "info",
    log:           true,
    raise_errors:  true

Create a service:

service = client.service(:ship)

# see what operations are available:
service.operations # => [ :process_shipment, .... ]

Perform a request:

response = service.call(

  # the operation as mentioned earlier

  # the attributes (after the Version tag)
  requested_shipment: {
    ship_timestamp:  Time.now.utc.iso8601(2),
    dropoff_type:    "REGULAR_PICKUP",
    service_type:    "PRIORITY_OVERNIGHT",
    packaging_type:  "YOUR_PACKAGING",
    # etc ...

The response has everything Savon offers, plus some methods specific to FedEx.

# From Savon:
all_the_things = response.body
severity = response.xpath("//Notifications/Severity").inner_text
severity = response.css("Severity").inner_text

# From Fex:
response.image # only for shipments with labels

For examples on how to use this gem, visit the spec/integration directory.

Running gem specs

To run the specs on this project, you can create a file called spec/support/credentials.yml, and fill it with your own test keys.

  :key: "xxx"
  :password: "xxx"
  :account_number: "xxx"
  :meter_number: "xxx"

  :key: "xxx"
  :password: "xxx"
  :account_number: "xxx"
  :meter_number: "xxx"

You can specify production and/or test. The production keys are used for the address validation service, because that doesn't work for me on test.

To use the keys in an integration spec, add :production_environment or :test_environment as group metadata keys, and the methods credentials and mode are made available for you:

describe "FedEx rate service", :test_environment do

  it "should do something" do
    client = Fex.client(credentials: credentials, mode: mode)
    # etc ...


If you don't specify keys, these specs will be skipped.


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request