This USPS Shipping Plugin for WooCommerce provides integration with USPS Web Tools and your WooCommerce website. It is able to provide live shipping rates directly to your customers in their shopping cart as well as at checkout. It, also provides up-to-date package information from USPS’s Parcel Tracking service. It can be used to ship within USA as well as Worldwide.

Support Excellence: This plugin comes with great customer support.  It is easy to install and configure and comes with a handly little logging feature that can help you with setup.  Have a question? Just add a comment

Features include: USPS Webservices Integration, Live Rates in Cart, Multiple Warehouses, Advanced Box Packing, Package Tracking and Lettermail / Flat Rates

5* Reviews: Feature Availability. I absolutely love how easy this is to use. It's so much better than the WooThemes extension as it gives more features. One of my favorites is seeing what shipping options were displayed to my customer. Another feature that I love is the tracking updates via email to the customer. Big ups to the developers of this plugin! I would definitely recommend this to any business owner.

Parcel Tracking Service

Package Tracking is available when you enter the PIN (Parcel Identification Number) or Tracking Number into the customers order details. This plugin will automatically look up the most recent and up to date event information available for your order from USPS on a daily basis. You can set an automatic email notification to be sent to your customer when the package is mailed or delivered. The tracking information can be set to allow your customer to receive up to date information on their order either as an email notification and/or at your customer order page.

Live Shipping Rates in the Shopping Cart

This shipping plugin uses the product’s weight and dimensions to calculate the most accurate shipping rates. For the rates to work, product weight is required but product dimensions are optional. The shipping cost can be calculated with boxes, if configured.  If desired there is the option to add a mark-up rate to shipping charges.

You are able to choose which services from USPS you want to offer your customer (ie. USPS Retail Ground, USPS Priority Mail, USPS Priority Mail Express, etc).  There is also an option available to provide estimated Delivery Dates if needed. The shipping charges will be calculated and displayed using current and live rates directly from USPS. 

An additional feature gives you the option to set up custom Flat Rates; which gives you the ability to set a flat rate for standard envelopes or parcels that you use for shipping.  

USPS Services Available

USA First Class

  • First Class Mail Large Envelope
  • First Class Mail Letter
  • First Class Mail Parcel
  • First Class Package Service

USA Retail Ground

  • Retail Ground

USA Media Mail

  • Media Mail

USA Priority Mail

  • Priority Mail
  • Priority Mail Express

USA Priority Mail Flat Rate

  • Priority Mail Flat Rate Envelope
  • Priority Mail Padded Flat Rate Envelope
  • Priority Mail Small Flat Rate Box
  • Priority Mail Medium Flat Rate Box
  • Priority Mail Large Flat Rate Box
  • Priority Mail Small Flat Rate Envelope
  • Priority Mail Legal Flat Rate Envelope
  • Priority Mail Regional Rate Box A
  • Priority Mail Regional Rate Box B
  • Priority Mail Express Legal Flat Rate Envelope
  • Priority Mail Express Flat Rate Envelope
  • Priority Mail Express Padded Flat Rate Envelope
  • Priority Mail Express Flat Rate Boxes

International Priority Mail

  • Priority Mail International
  • Priority Mail Express International

International Global Express

  • USPS GXG Envelopes
  • Global Express Guaranteed (GXG)
  • Global Express Guaranteed Document
  • Global Express Guaranteed Non-Document Rectangular
  • Global Express Guaranteed Non-Document Non-Rectangular

International First Class

  • First Class Mail International Large Envelope
  • First Class Package International Service

International Priority Mail Flat Rate

  • Priority Mail International Flat Rate Envelope
  • Priority Mail International Window Flat Rate Envelope
  • Priority Mail International Small Flat Rate Envelope
  • Priority Mail International Legal Flat Rate Envelope
  • Priority Mail International Padded Flat Rate Envelope
  • Priority Mail International Small Flat Rate Box
  • Priority Mail International Medium Flat Rate Box
  • Priority Mail International Large Flat Rate Box
  • Priority Mail Express International Flat Rate Boxes
  • Priority Mail Express International Flat Rate Envelope
  • Priority Mail Express International Legal Flat Rate Envelope
  • Priority Mail Express International Padded Flat Rate Envelope

Summary of Features

  • Live accurate shipping rates directly in Woocommerce shopping cart and checkout page
  • Parcel Tracking: Updates your order with Parcel Tracking details when a PIN/Tracking number is added
  • Ability to add a markup/margin to shipping rates
  • Ability to use Shipment Boxes in rates calculation
  • Bilingual option in English and French (Translation-ready with Language files (.po/.mo))
  • Requires a USPS Web Tools API Account (free) – You can simply sign-up online at USPS Web Tools

Software Requirements

  • WordPress 3.1 + with WooCommerce 2.4+
  • PHP cURL or fsockopen enabled (with outgoing Firewall configured if required). Uses WordPress wp_remote_request
  • USPS WebTools Account with Production Access (free)
  • PHP SimpleXML  (enabled by default in most PHP setups)


Version 1.3.10

  • Flat rates improvements

Version 1.3.9

  • Minor improvements
  • Woocommerce version support

Version 1.3.8

  • Lettermail/flat rates layout improvement
  • Option for flat rate subtotal to include or exclude tax.

Version 1.3.7

  • Product variations issue fix
  • Delivery dates formatting
  • Improved Regional Rates options
  • Woocommerce version support

Version 1.3.6

  • Margin adjustment feature for each service
  • Box definition layout improvements
  • More hooks/filters available to control options such as timeouts
  • Woocommerce version support

Version 1.3.5

  • Woocommerce version declaration support

Version 1.3.4

  • Updated use of Zip+4 destination zip codes to ensure complete support

Version 1.3.3

  • Code refactoring and small improvements
  • Support USPS name change of First Class Parcel to First Class Package Service Retail

Version 1.3.2

  • Small fix when using Commercial Rates
  • Rates for Countries that do not require a postal code
  • Code improvements

Version 1.3.1

  • Added option to use Commercial Rates instead of Retail Rates

Version 1.3.0

  • Added feature for Automatic updates
  • Refactoring and code improvements

Version 1.2.13

  • Added more details to Rates lookup logging
  • Updated Woocommerce 3.x new methods

Version 1.2.12

  • Woocommerce 3.x support
  • Fixed Optimized box selection.

Version 1.2.11

  • Fixed issue related to Priority Flat rate packages
  • Woocommerce 3.x compatibility

Version 1.2.10

  • Fixed packing issue related to dimensions, Optimized box selection.
  • Code improvements

Version 1.2.9

  • Refactored Box packing and added Volumetric Box packing algorithm
  • Added feature: Exchange Rate (to make it more straightforward than using Margin for rates).
  • Code improvements, more data and improved layout for Rates lookup logging.

Version 1.2.8

  • Optimized box packing, better box selection and box packing fixes
  • Added feature: Limit Sending Address/Warehouses on Products (When using Multiple Sender Addresses)
  • Added feature for multiple Class Rules

Version 1.2.7

  • Improved calculation of international rates
  • Code improvements, fixes

Version 1.2.6

  • Improved source address configuration. US Territories (ie. Purto Rico) supported as source addresses

Version 1.2.5

  • Code improvements, fixes

Version 1.2.4

  • Custom Service names – Added feature to change the service name to a custom names
  • New feature to customize the Delivered By label
  • Code improvements, fixes

Version 1.2.3

  • Support for Shipping Zones in Woocommerce 2.6 (pre-release)
  • Box margin – Allow for negative values

Version 1.2.1

  • Code improvements, updated documentation

Version 1.2

  • Feature added to Validate API Credentials from settings page
  • Shipping calculation works with products that have weight only (no dimensions)
  • Bugfixes and code improvements

Version 1.1

  • Supports WooCommerce 2.2+
  • Initial Release


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