USPS Shipping Extension with Postage for Magento 2

5 out of 5


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  • Description
  • Changelog
  • Reviews (3)
  • FAQ (6)
  • Comments (16) Shipping Extension with USPS Postage is a Magento 2 extension that helps you to completely automate USPS shipping using by displaying shipping rates in cart / checkout page, pay postage & print label from within Magento.
Stamps Shipping Extension with USPS Postage is a Magento 2 extension that helps you to completely automate USPS shipping using by displaying shipping rates in cart / checkout page, pay postage & print label from within Magento.
You have to Signup for a account and Subscribe Stamps service to make use of this extension. Base plan starts from $15.99/Month. For more details, Check out pricing plan.
Real Time Rates: Using this plugin, your Magento Store will be capable of presenting real-time USPS shipping rates to your Customer during Checkout process. This real-time rates will be based on the shipping destination and weight of items in the cart. This accurate USPS shipping cost will be charged to the customer while checkout and will be part of the order details.
Label Printing Postage: After order completion, Seller will be able to go to Order admin page and print the USPS shipping label with Postage Paid and ready to Ship.
Weight Based Shipping: The USPS shipping rates charged while order and label printing will be based on the Weight of Order / Package. Plugin even has configuration option on Settings page to define maximum package weight. In this case, the items in the order will be split into multiple packages based on the weight.
Create and Cancel Shipment: Seller can Create the Shipment Label from individual order admin page. Once Label is created, there is an option to Cancel the created shipment label, which will revert the amount paid during Create Shipment process.
How does it work?
Step 1: Install the Extension, input your Account details and enable – USPS Shipping Method for Magento.
Step 2: Customer sees USPS shipping rates provided by, based on items in their cart before placing an order.
Step 3: Pay Postage and Print Label from within Magento order page.

Main Features

Live Shipping Rate:Based on the product weight, shipping destination etc., this Extension fetches USPS postage rates from your account for both domestic and international shipping services. You can choose to return list rates or account / negotiated rates.


Shipping Price Calculator: Get USPS postage rates for following shipping services.

  • First-Class Mail
  • Priority Mail Express
  • Media Mail Parcel
  • Library Mail Parcel
  • USPS Parcel Post
  • USPS Parcel Select
  • USPS Critical Mail
  • Priority Mail
  • Priority Mail Express International
  • Priority Mail International
  • First-Class Package Service International
Print Shipping Label: Print shipping labels within Magento.
Shipment details would be sent to online account and then the shipping label would get generated which you can print. Postage is automatically paid on these labels using your account.
This Extension integrates with APIs to print domestic or international shipping labels.


Weight Based Packing: Pack items based on weight using Magento packaging types.


Services / Packages Types: You can choose desired services to display while checkout.


Handling Fees: You have option to set up handling fees.


Following Packing Types are supported:
Package, Postcard, Flat Rate Box, Flat Rate Envelope, Flat Rate Padded Envelope, Legal Flat Rate Envelope, Letter, Large Envelope or Flat, Large Flat Rate Box, Large Package, Oversized Package, Regional Rate Box A, Regional Rate Box B, Small Flat Rate Box, Thick Envelope.

Other features

  • Disable Printing Postage Amount on Label.
  • Insurance Option.
  • Supports free shipping as a shipping method.
  • Option to define a minimum order amount for shipping.

About is a leading provider of Internet-based postage services. With over 500,000 customers,’s online postage service simplifies access to the lowest USPS shipping rates and the most popular USPS services for small businesses, enterprises and online retailers. Whether you ship one package a day or 1000, from your garage or from a giant warehouse, has the tools to make your USPS® shipping process faster, more affordable and more efficient than ever before.
For the integration to work, you need to enter user credentials in the settings screen of Extension
For obtaining credentials, you have to signup for a account.


Settings Page
Checkout Page
Order Page


Last Updated: 17-April-2017
[New feature]
* Free shipping as the shipping method.
* Minimum order amount for free shipping.

= 1.0.12 =
* API mode was hitting live server in test mode and staging server in live mode after version 1.0.10
= 1.0.9 =
* Bug Fix in API mode settings
= 1.0.8 =
* Stamps USPS Hidden postage issue fixed
= 1.0.6 =
* Stamps Test mode message updates and enhancements.
= 1.0.5 =
* Bug fix: Fixed issue where shipping rate not visible when country/zip code is changed in certain cases.
= 1.0.4 =
* Made Extension Compatible with Magento 2.1.
= 1.0.3 =
* Fixed an issue with address in shipment creation.
= 1.0.2 =
* Stability Improvements.
= 1.0.0 =
* Dynamic Shipping Rates.
* Weight Based Shipping.
* Label Printing.

3 reviews for USPS Shipping Extension with Postage for Magento 2

  1. Michael
    5 out of 5

    (verified owner)

    Works Great So Far. Had a few issues that were fixed quickly. Support is Great.

  2. Rodney
    5 out of 5

    (verified owner)

    Support is the best of any extension I have purchased. They helped me through a theme specific issue and resolved it quickly. Their response time is very fast. Great extension!

  3. Jim
    5 out of 5

    (verified owner)

    Your support is amazing !
    Some difficulties to configure it but it’s work very well and do the job!

Only logged in customers who have purchased this product may leave a review.


Frequently Asked Questions

Yes. You are absolutely right. Each of our shipping extensions will work mutually exclusive. Hope it clarifies.

Yes. We have an option Single Package under Package Type on extension settings page.


Yes. We have a support team working on for fixing any issues related with Extension.

100% Money back guarantee.

Yes. It will keep settings.

  • gitty

    gitty - 7 months ago

    I purchased this plugin but somehow after adding address it still says no shipping methods avail. any help?

  • Anindo

    Anindo - 3 months ago

    Hi Gitty, We apologise for the inconvenience caused and the late reply. In such cases, the best way to debug this is to check the debug log in Magento. You can get the file from this path : Request will be in /srv/users/serverpilot/apps/onlyhearts-magento/public/var/log/stampsrequest.log file and Response will be in /srv/users/serverpilot/apps/onlyhearts-magento/public/var/log/stampsresponse.log file. If you can send us these files, we would be able to understand exactly what problem is causing this. Do let us know if you have any query.

  • ccomivan

    ccomivan - 10 months ago

    After trying to install another extension, a problem occurred with your stamps extension. After some inquiries a conclusion presented itself and I quote our server-side, magento specialized support: "It is the ExtensionHawk Stamps extension. It is using an Magento 1 class for some odd reason and this is a Magento 2 site, it is definitely a code issue with that extension that the extension developers will need to sort out." Please reach out if we can provide further information and also what to do next. Thank you!

  • Anindo

    Anindo - 10 months ago

    Hi Ccomivan, We assure you that we will resolve all your outstanding issues. However, to check it,we require access to your website so that we can check the exact problem and correct the code (if any change is required). Or else if you can direct us to the exact problem, that would be also fine for us. Request you to reply us via ticket so that we can quickly resolve your case.

  • alexmarcxyz

    alexmarcxyz - 10 months ago

    My Magento 1.9 based store currently has 600 SKUs. I am expecting an increase in traffic because of my upcoming promo campaign. The current load time is 15 seconds and since I am expecting increase in traffic, this load time could be a problem for me. What should I do to improve it? Any suggestions.

  • Veeresh

    Veeresh - 10 months ago

    Hello Alex, To reduce Load time of Magento, Enable Query cache in mysql and Use full page cache like turpentine. Hope this will work for you. Our USPS Shipping Extension with postage for Magento does not work for Magento 1.9 version This will be compatible with Magento 2.0 and higher versions. Hope this helps for you. Regards, Veeresh

  • jackc0119

    jackc0119 - 1 year ago

    Hello, I have registered for and entered my user name and password in the store configuration shipping setting but the rates are not showing. Please advise.

  • Nea

    Nea - 1 year ago

    Hi, We apologize for the late reply. Usually , this error comes when the product is missing weight or dimensions or credentials are not entered correctly in plugin settings We request you to enable the debug option in the plugin settings and then provide us the following information by raising ticket at support@xadapter.cóm *Debug request and response in a text file Also, share the screenshot of plugin settings page Regards, Nea

  • Ivan

    Ivan - 1 year ago

    We are getting the error below when we attempt to SAVE a package in Magento API Authorization failure. User 626THEOR6954 is not authorized to use API SignatureConfirmationV3. IS this n issue I need to figure out with How do we obtain an API id from Is their a quick way to obtain one?

  • elvin

    elvin - 1 year ago

    Hi Ivan, You can get your API ID by registering here.

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