Woocommerce Fedex Rest API shipping rates integration

To integrate FedEx shipping rates via the REST API into a WooCommerce store, here’s a step-by-step guide you can follow. This allows your WooCommerce checkout to fetch real-time shipping rates from FedEx using their REST API.

🔧 Requirements

1. FedEx Developer Account

   • Sign up or log in: https://developer.fedex.com

   • Create a project to get your API Key, Secret, Account Number, and Meter Number.

2. WooCommerce Store

   • Running on WordPress with WooCommerce installed and configured.

   • SSL enabled for API communication.

3. Optional but recommended: Child Theme or Custom Plugin for modifications.

🚀 Integration Steps

1. Get FedEx API Credentials

• Go to FedEx Developer Portal

• Create a project under “Manage Projects”

• Enable Rates API (and optionally, Shipments, Labels, etc.)

• Save your:

  • API Key

  • Secret

  • Account Number

  • Meter Number

2. Install a FedEx WooCommerce Plugin (Quick Option)

If you want a quick out-of-the-box solution:

• Plugin: WooCommerce FedEx Shipping Plugin with Print Label – by PluginHive

• Supports real-time rates, label printing, and tracking.

You just enter your API credentials, set up services, and you’re good to go.

3. Manual Integration (Custom REST API)

If you prefer to write custom code:

A. Hook into WooCommerce Shipping Method

Register a custom shipping method in functions.php or a custom plugin:

add_action('woocommerce_shipping_init', 'custom_fedex_shipping_method_init');
function custom_fedex_shipping_method_init() {
    require_once 'class-fedex-shipping.php';
}

add_filter('woocommerce_shipping_methods', 'add_custom_fedex_shipping_method');
function add_custom_fedex_shipping_method($methods) {
    $methods['fedex_custom'] = 'Fedex_Custom_Shipping_Method';
    return $methods;
}

B. Create FedEx Shipping Class

File: class-fedex-shipping.php

class Fedex_Custom_Shipping_Method extends WC_Shipping_Method {
    public function __construct() {
        $this->id                 = 'fedex_custom';
        $this->method_title       = __('FedEx Custom');
        $this->method_description = __('FedEx Shipping via REST API');
        $this->enabled            = "yes";
        $this->title              = "FedEx";

        $this->init();
    }

    function init() {
        $this->init_form_fields();
        $this->init_settings();
    }

    public function calculate_shipping($package = array()) {
        $rate = $this->get_fedex_rate($package);
        if ($rate) {
            $this->add_rate(array(
                'label' => 'FedEx Standard',
                'cost'  => $rate,
            ));
        }
    }

    private function get_fedex_rate($package) {
        $weight = $package['contents_weight'];
        $dest = $package['destination'];

        $body = [
            "accountNumber" => ["value" => "YOUR_ACCOUNT_NUMBER"],
            "requestedShipment" => [
                "dropOffType" => "REGULAR_PICKUP",
                "serviceType" => "FEDEX_GROUND",
                "packagingType" => "YOUR_PACKAGING",
                "shipper" => [
                    "address" => [
                        "postalCode" => "YOUR_ZIP",
                        "countryCode" => "US"
                    ]
                ],
                "recipient" => [
                    "address" => [
                        "postalCode" => $dest['postcode'],
                        "countryCode" => $dest['country']
                    ]
                ],
                "packages" => [[
                    "weight" => [
                        "units" => "LB",
                        "value" => $weight
                    ]
                ]]
            ]
        ];

        $response = wp_remote_post('https://apis.fedex.com/rate/v1/rates/quotes', [
            'headers' => [
                'Content-Type'  => 'application/json',
                'Authorization' => 'Bearer ' . $this->get_access_token(),
            ],
            'body' => json_encode($body)
        ]);

        if (!is_wp_error($response)) {
            $data = json_decode($response['body'], true);
            return $data['output']['rateReplyDetails'][0]['ratedShipmentDetails'][0]['totalNetCharge']['amount'];
        }

        return false;
    }

    private function get_access_token() {
        $response = wp_remote_post('https://apis.fedex.com/oauth/token', [
            'headers' => ['Content-Type' => 'application/x-www-form-urlencoded'],
            'body'    => [
                'grant_type'    => 'client_credentials',
                'client_id'     => 'YOUR_CLIENT_ID',
                'client_secret' => 'YOUR_CLIENT_SECRET',
            ]
        ]);

        if (!is_wp_error($response)) {
            $body = json_decode($response['body'], true);
            return $body['access_token'];
        }

        return '';
    }
}

Replace placeholders like YOUR_ACCOUNT_NUMBER, YOUR_CLIENT_ID, etc., with your actual credentials.

🧪 Testing

1. Set WooCommerce to Debug Mode (in shipping settings).

2. Use a real U.S. ZIP and destination in test checkout.

3. Validate FedEx rates are appearing correctly.