Steps to Integrate USPS Carrier in Magento

Steps to Integrate USPS Carrier in Magento

Magento integrates with several major carriers, including USPS, FedEx, UPS, and DHL. USPS brings its unique strengths to the table, from cost-effective solutions to extensive domestic coverage.

This tutorial highlights the benefits of choosing USPS and guides you through the essential steps to integrate USPS into your Magento store.

Key Takeaways

  • USPS offers cost-effective solutions, making it an attractive option for Magento stores looking to optimize shipping costs.

  • Extensive domestic coverage by USPS provides unparalleled access across the United States.

  • Real-time rate calculations and access to USPS discounts enhance the checkout experience.

  • The integration process is straightforward, requiring you to obtain USPS API credentials and configure shipping settings.

  • Flexibility in shipping methods allows for tailored shipping strategies that can adapt to various business models and customer needs.

Different Carrier Options in Magento

Magento supports several major carriers directly. The most popular carriers are USPS, FedEx, UPS, and DHL. Here's how USPS shipping service stacks up against the other three carriers:



  • More cost-effective for small parcels.

  • Extensive domestic coverage, including PO Boxes, APO, FPO, and DPO locations.

  • Free Saturday delivery and free boxes for certain services.

  • No additional fees for residential delivery or fuel surcharges.


  • Slower delivery times for some services compared to FedEx and UPS.

  • Less detailed tracking information than some competitors.

  • It may have limitations for very heavy or large packages.

2. FedEx


  • Offers a wide range of services, including overnight, express, and international shipping.

  • Reliable tracking and delivery updates.

  • Better suited for heavier packages.

  • Offers both air and ground services.


  • More expensive for smaller parcels.

  • Extra charges for weekend delivery and additional services.

3. UPS


  • Comprehensive tracking and high reliability.

  • Extensive international shipping options.

  • Offers a wide range of time-specific delivery options.

  • Suitable for heavy or bulky shipments.


  • Costs can be higher for smaller packages.

  • Additional fees for residential deliveries and fuel surcharges.

4. DHL


  • Specializes in international shipping and has extensive global coverage.

  • Competitive pricing for international shipments.

  • Offers detailed tracking and reliable delivery times.


  • Less focus on domestic US shipping, which might limit options for US-based sellers targeting a domestic market.

  • There may be more cost-effective options for domestic shipping within the US.

Benefits of Choosing USPS as Your Shipping Carrier

USPS emerges as the best Magento carrier choice because of the following factors:

1. Wide Range of Shipping Options

USPS provides a variety of shipping services, including domestic and international shipping options. The options include Priority Mail, Express Mail, First-Class Mail, and more. The diversity allows customers to choose a shipping method that best suits their budget and delivery time requirements.

2. Cost-Effective Shipping Solutions

Competitive pricing, especially for smaller parcels and for shipments within the United States, makes USPS a preferred choice. It helps reduce shipping costs for both the merchant and the customers, making products more appealing due to lower overall costs.

3. Reliability and Trust

USPS is a well-established postal service with a long history of delivering mail and packages. Its reliability and widespread recognition instill trust in customers, who might prefer USPS over other carriers for their shipments.

4. Automatic Rate Calculation

Integrating USPS into Magento allows for real-time shipping rate calculations based on package weight, dimensions, and destination. It ensures that customers are charged accurate shipping fees at checkout. It eliminates the need for manual calculations and reduces cart abandonment rates.

5. Access to USPS Discounts and Services

Through Magento, you can access various USPS discounts and services that might not be available otherwise. It includes flat-rate shipping options, which can be more cost-effective for certain types of shipments.

6. Enhanced Customer Experience

Multiple Magento 2 shipping options and transparent pricing at checkout offered by USPS improve the overall customer experience. Customers appreciate the flexibility to choose a shipping method that balances cost and delivery speed.

7. Streamlined Shipping Process

Integrating USPS with Magento streamlines the shipping process, from label printing to tracking package delivery. It can save time and reduce the complexity of managing shipments.

8. Geographic Reach

USPS provides a wide geographic coverage, including remote and rural areas within the United States. For businesses, this means being able to serve a broader customer base without having to worry about the limitations of shipping reach.

Steps to Integrate USPS Carrier in Magento

Step 1: Obtain USPS API Credentials

To configure the USPS shipping, you must first create a USPS Web Tools account to get your API credentials. You will receive a user ID and a password, which are essential to set up USPS with your Magento store.

Step 2: Enable the USPS Shipping Method in Magento

  1. Log in to your Magento Admin Panel.

Enabling USPS Shipping Method in Magento Admin Panel for Efficient E-commerce Shipping Solutions

  1. Navigate to Stores > Configuration > Sales > Delivery Methods.

Navigating to USPS Shipping Method Configuration in Magento for Cost-Effective Shipping

  1. Find the USPS section under Delivery Methods.

Setting Up USPS Shipping Methods in Magento to Access Extensive Domestic Coverage

Step 3: Configure USPS Shipping Settings

Within the USPS settings:

  1. Enabled for Checkout: Set to Yes to enable USPS shipping.

Configuring USPS Shipping Settings to Enable Checkout in Magento

  1. Gateway URL: This is pre-filled with the USPS API URL. Generally, you don't need to change it.

  2. Secure Gateway URL: Also pre-filled and typically does not need alteration.

  3. USERID and Password: Enter the USERID and password for your USPS account (Step 1).

  4. Mode: Mode has the following two options:

    • Development: This mode runs USPS in a test environment.

    • Live: It runs USPS in a live production environment.

Selecting USPS Shipping Mode in Magento Settings to Optimize E-commerce Shipping Strategy

  1. Packages Request Type:

    • Divide to equal weight (one request): One submission request for multiple packages is enough when the packages are divided by equal weight.

    • Use origin weight (few requests): Multiple packages must be submitted as separate requests if using origin weight to calculate the shipping cost.

  2. Container: Choose the type of packaging you use (e.g., Flat Rate Box, Rectangular, etc.).

  3. Size: Specify the size of your package. It might affect the shipping rate.

  4. Machinable: Specify whether USPS machines can process your package.

  5. Maximum Package Weight: Enter the maximum package weight. For USPS, it is 70 lbs.

  6. Calculate Handling Fee:

    Fill out the following fields to set how you want to calculate the handling fee:

    • Calculate Handling Fee: Set it to either Fixed or Percent.

    • Handling Applied: Set it to either Per Order or Per Package.

    • Handling Fee: Specify the handling fee to be charged per order or package. For a percentage fee, use the decimal format. For example, 0.15 for 15%.

  7. Allowed Shipping Methods:

    Fill in the following fields to specify the allowed shipping methods:

    • Allowed Methods: Select all the methods you want to be available to your customers. For example, First-Class Mail Large Envelope, First-Class Mail Letter, Priority Mail, etc.

    • Free Method: Set it to the method you want to use for free shipping. If you don’t want to offer free shipping, set it to None.

    • Enable Free Shipping Threshold: To set a minimum order limit that qualifies for free shipping, set this field to Enable. Then, enter the order value for the Free Shipping Amount Threshold.

    • Displayed Error Message: Use this field to specify the message when USPS is not available.

  8. Geographic Settings:

    • Ship to Applicable Countries: Set it to All Allowed Countries to select all the countries that USPS delivers to.

    • Ship to Specific Countries: Specify the countries you want the USPS shipping to be available for.

    • Debug: Set it to Yes to maintain a log file of all the shipments made through USPS.

    • Show Method if Not Applicable: Setting it to Yes will list all available shipping methods during checkout, including those that don’t apply to the shipment.

    • Sort Order: Enter a number to determine the sequence in which USPS appears in the list of delivery methods. 0=first, 1= second, and so on.

  9. Click Save Config to save your USPS configuration.

Step 4: Test the Configuration

After configuring, it's crucial to test the USPS shipping options on your storefront to ensure everything works as expected. Place a test order and proceed to checkout to see if the USPS shipping methods and rates are displayed correctly.

Step 5: Troubleshooting

If you encounter any issues, such as shipping rates not appearing or errors during checkout, check the following:

  • Ensure your USPS account is active and the API credentials are correct.

  • Verify that your product weights and dimensions are entered accurately in Magento.

  • Check if there are any restrictions on the shipping methods you’ve selected (some services have geographical or weight limitations).

  • Consult Magento and USPS documentation for any specific configuration details or error messages you might be getting.


1. How do I create a USPS shipping account for my Magento 2 store?

To integrate the United States Postal Service (USPS) with your Magento 2 store, start by creating a USPS shipping account. Visit the USPS Web Tools page and sign up to receive your API credentials, which are necessary for integration.

2. Can I set a free shipping amount threshold when using USPS in Magento 2?

Within Magento 2, you can configure the USPS carrier to offer free shipping based on a minimum order amount. It is done by setting the "Free Shipping Amount Threshold" in the USPS shipping method configuration.

3. How can I run USPS in a test environment before going live on my Magento 2 store?

To ensure the USPS shipping method works correctly with your Magento 2 store, use the USPS test server during configuration. It allows you to run USPS in test mode, ensuring everything functions as expected before making it live for your customers.

4. What is the basis of calculating the shipping cost for USPS in Magento 2?

The shipping cost for USPS in Magento 2 is calculated based on package weight, dimensions, and destination. If an order is divided into multiple packages, each must be submitted as a separate request when using origin weight as the basis of calculation. It ensures accurate shipping rates for each package.

5. How do I configure USPS carrier in Magento 2 to ensure the shipping method appears on the checkout page?

Navigate to the Shipping Methods section under Configuration in your Magento 2 admin panel. Enter your USPS API credentials and set your preferences for packaging type, weight, and other settings. Specify which shipping options you'd like to offer, such as Priority Mail or Express Mail.

6. Why is USPS better than other carriers?

USPS is the preferred carrier in the Magento 2 marketplace for the following reasons:

  • The setup process for USPS shipping in Magento 2 is straightforward. It requires just a user ID and a link to the USPS test server for initial testing.

  • USPS offers a robust basis for calculating shipping rates, considering factors like weight, dimensions, and destination.

  • USPS supports a wide range of domestic and international shipping services.

  • The ability to generate a shipping label directly from the Magento platform simplifies the shipping process.

  • USPS's integration into Magento 2 allows for a seamless selection of the shipping method on the checkout page.


Integrating USPS as a carrier in Magento offers cost-effective shipping solutions and extensive domestic coverage. This tutorial detailed a straightforward process for integrating USPS into Magento, emphasizing key advantages. Following the steps mentioned in this guide benefits you in several ways:

  • Benefit from USPS’ affordability, especially beneficial for smaller parcels.

  • Capitalize on USPS's extensive coverage, ensuring your products reach every corner of the United States.

  • Build customer trust with the reliable and time-tested services of USPS.

  • Improve your online store’s checkout process with real-time rate calculations and shipping discounts.

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Wishu Sindhu
Wishu Sindhu
Technical Writer

With over 15 years experience in the tech industry, Wishu excels in communicating various software concepts. Focusing on Magento, he has produced extensive documentation and tutorials, sharing Magento hosting expertise with audiences.

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