Shipping with USPS
If you're registered with USPS to receive live shipping rates on your store's checkout page, these service codes will be pre-programmed into your store's shipping table by default. However, we recommend you double-check your settings against our list below to avoid any unnecessary shipping snafus.�
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USPS will be updating their Live Rate API on January 25th, 2026.
In order to avoid any interruption you are required to re-connect your account within your Volusion admin dashboard. You'll need to ensure you have a Business account with USPS.
The onboarding process is much smoother if you are logged into your USPS account first.
To get started follow the steps below:
1. Go to cop.usps.com and log into your account.
2. Ensure you have enabled the shipping rate API and that your account is fully set up. The page will show a green check mark that says
�Your account was transitioned from EVS to SHIP/USPS APIs�
3. In the same browser, open a new tab and Login to your Volusion Admin Dashboard and go to Settings > Shipping
4. Go to the Live Rate Section and select USPS in the drop down and then click on 'connect'.
5. This should take you to an authorization screen, check the box to agree to the terms and click submit.�
6. You should be redirected to your admin dashboard with a message stating you have successfully onboarded.�
There should not be any other necessary steps until we get closer to the official transition, at which time we will send out additional notices and information.
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Not yet registered with USPS to offer live rate shipping in your Volusion store? Check out our main Shipping article, particularly the Shipping Methods and Live Rate Shipping Methods sections. �
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USPS Service Codes
In the list below, the text in bold corresponds to each shipping method's default name, while the text to the right corresponds to that method's service code.
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Individual Shipping Rates
USPS Ground Advantage:�USPS Ground Advantage®
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USPS Library: Library Mail Parcel
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USPS Media Mail: Media Mail Parcel
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USPS BPM (Bound Printed Matter): Bound Printed Matter
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USPS Retail Ground: USPS Retail Ground™
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USPS Priority Mail International: Priority Mail International™
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USPS Priority Mail International Flat Rate Envelope: Priority Mail International® Flat Rate Envelope
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USPS Priority Mail International Small Flat Rate Box: Priority Mail International® Small Flat Rate Box
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USPS Priority Mail International Medium Flat Rate Box: Priority Mail International® Medium Flat Rate Box
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USPS Priority Mail International Large Flat Rate Box: Priority Mail International® Large Flat Rate Box
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USPS First-Class Mail Package: First-Class Package Service - Retail™
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USPS First-Class Mail Large Envelope: First-Class Mail® Large Envelope
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USPS First-Class Mail Letter: First-Class Mail® Letter
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USPS First-Class Mail International Letter: First-Class Mail® International Letter
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USPS First-Class Mail International Large Envelope: First-Class Mail® International Large Envelope
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USPS First-Class Package International Service: First-Class Package International Service™
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USPS Priority Mail Express International: Priority Mail Express International™
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USPS Priority Mail Express International Flat Rate Envelope: Priority Mail Express International™ Flat Rate Envelope
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USPS Global Express Guaranteed (GXG): Global Express Guaranteed® (GXG)
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USPS Global Express Guaranteed Non-Document Rectangular: Global Express Guaranteed® Non-Document Rectangular
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USPS Global Express Guaranteed Non-Document Non-Rectangular: Global Express Guaranteed® Non-Document Non-Rectangular
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USPS GXG Envelopes: USPS GXG™ Envelopes
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For the following USPS shipping options, you'll need to enable multiple USPS methods in your store in order to present a single version of that shipping method to customers on the storefront. All rates listed under a bold heading inside brackets indicate requirements for the rate inside brackets to function properly.
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For example, to offer USPS Priority Mail to customers, you must keep the following six shipping methods active: USPS Priority Mail, USPS Priority Mail 1-Day, USPS Priority Mail 2-Day, USPS Priority Mail 3-Day, USPS Priority Mail DPO, and USPS Priority Mail Military. Only one version of USPS Priority Mail will display to customers at any time.
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[USPS Priority Mail]
USPS Priority Mail: Priority Mail®
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USPS Priority Mail 1-Day: Priority Mail 1-Day™
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USPS Priority Mail 2-Day: Priority Mail 2-Day™
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USPS Priority Mail 3-Day: Priority Mail 3-Day™
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USPS Priority Mail DPO: Priority Mail DPO™
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USPS Priority Mail Military: Priority Mail Military™
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[USPS Priority Mail Flat Rate Envelope]
USPS Priority Mail Flat Rate Envelope: Priority Mail™ Flat Rate Envelope
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USPS Priority Mail 1-Day Flat Rate Envelope: Priority Mail 1-Day™ Flat Rate Envelope
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USPS Priority Mail 2-Day Flat Rate Envelope: Priority Mail 2-Day™ Flat Rate Envelope
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USPS Priority Mail 3-Day Flat Rate Envelope: Priority Mail 3-Day™ Flat Rate Envelope
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USPS Priority Mail DPO Flat Rate Envelope: Priority Mail DPO™ Flat Rate Envelope
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USPS Priority Mail Military Flat Rate Envelope: Priority Mail Military™ Flat Rate Envelope
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[USPS Priority Mail Small Flat Rate Box]
USPS Priority Mail Small Flat Rate Box: Priority Mail™ Small Flat Rate Box
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USPS Priority Mail 1-Day Small Flat Rate Box: Priority Mail 1-Day™ Small Flat Rate Box
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USPS Priority Mail 2-Day Small Flat Rate Box: Priority Mail 2-Day™ Small Flat Rate Box
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USPS Priority Mail 3-Day Small Flat Rate Box: Priority Mail 3-Day™ Small Flat Rate Box
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USPS Priority Mail DPO Small Flat Rate Box: Priority Mail DPO™ Small Flat Rate Box
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USPS Priority Mail Military Small Flat Rate Box: Priority Mail Military™ Small Flat Rate Box
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[USPS Priority Mail Medium Flat Rate Box]
USPS Priority Mail Medium Flat Rate Box: Priority Mail™ Medium Flat Rate Box
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USPS Priority Mail 1-Day Medium Flat Rate Box: Priority Mail 1-Day™ Medium Flat Rate Box
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USPS Priority Mail 2-Day Medium Flat Rate Box: Priority Mail 2-Day™ Medium Flat Rate Box
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USPS Priority Mail 3-Day Medium Flat Rate Box: Priority Mail 3-Day™ Medium Flat Rate Box
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USPS Priority Mail DPO Medium Flat Rate Box: Priority Mail DPO™ Medium Flat Rate Box
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USPS Priority Mail Military Medium Flat Rate Box: Priority Mail Military™ Medium Flat Rate Box
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[USPS Priority Mail Large Flat Rate Box]
USPS Priority Mail Large Flat Rate Box: Priority Mail™ Large Flat Rate Box
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USPS Priority Mail 1-Day Large Flat Rate Box: Priority Mail 1-Day™ Large Flat Rate Box
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USPS Priority Mail 2-Day Large Flat Rate Box: Priority Mail 2-Day™ Large Flat Rate Box
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USPS Priority Mail 3-Day Large Flat Rate Box: Priority Mail 3-Day™ Large Flat Rate Box
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USPS Priority Mail DPO Large Flat Rate Box: Priority Mail DPO™ Large Flat Rate Box
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USPS Priority Mail Military Large Flat Rate Box: Priority Mail Military™ Large Flat Rate Box APO/FPO/DPO
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[USPS Priority Mail Express]
USPS Priority Mail Express: Priority Mail Express™
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USPS Priority Mail Express 1-Day: Priority Mail Express 1-Day®
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USPS Priority Mail Express 2-Day: Priority Mail Express 1-Day®
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USPS Priority Mail Express 3-Day: Priority Mail Express 1-Day®
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USPS Priority Mail Express DPO: Priority Mail Express DPO™
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USPS Priority Mail Express Military: Priority Mail Express Military™
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[USPS Priority Mail Express Flat Rate Envelope]
USPS Priority Mail Express Flat Rate Envelope: Priority Mail Express™ Flat Rate Envelope
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USPS Priority Mail Express 1-Day Flat Rate Envelope: Priority Mail Express 1-Day™ Flat Rate Envelope
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USPS Priority Mail Express 2-Day Flat Rate Envelope: Priority Mail Express 2-Day™ Flat Rate Envelope
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USPS Priority Mail Express 3-Day Flat Rate Envelope: Priority Mail Express 3-Day™ Flat Rate Envelope
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USPS Priority Mail Express DPO Flat Rate Envelope: Priority Mail Express DPO™ Flat Rate Envelope
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USPS Priority Mail Express Military Flat Rate Envelope: Priority Mail Express Military™ Flat Rate Envelope
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[USPS Priority Mail Express Hold for Pickup]
USPS Priority Mail Express Hold for Pickup: Priority Mail Express™ Hold For Pickup
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USPS Priority Mail Express 1-Day Hold for Pickup: Priority Mail Express 1-Day™ Hold For Pickup
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USPS Priority Mail Express 2-Day Hold for Pickup: Priority Mail Express 2-Day™ Hold For Pickup
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USPS Priority Mail Express 3-Day Hold for Pickup: Priority Mail Express 3-Day™ Hold For Pickup
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USPS Priority Mail Express DPO Hold for Pickup: Priority Mail Express DPO™ Hold For Pickup
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USPS Priority Mail Express Military Hold for Pickup: Priority Mail Express Military™ Hold For Pickup
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[USPS Priority Mail Express Flat Rate Envelope Hold for Pickup]
USPS Priority Mail Express Flat Rate Envelope Hold for Pickup: Priority Mail Express™ Flat Rate Envelope Hold For Pickup
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USPS Priority Mail Express 1-Day Flat Rate Envelope Hold for Pickup: Priority Mail Express 1-Day™ Flat Rate Envelope Hold For Pickup
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USPS Priority Mail Express 2-Day Flat Rate Envelope Hold for Pickup: Priority Mail Express 2-Day™ Flat Rate Envelope Hold For Pickup
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USPS Priority Mail Express 3-Day Flat Rate Envelope Hold for Pickup: Priority Mail Express 3-Day™ Flat Rate Envelope Hold For Pickup
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USPS Priority Mail Express DPO Flat Rate Envelope Hold for Pickup: Priority Mail Express DPO™ Flat Rate Envelope Hold For Pickup
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USPS Priority Mail Express Military Flat Rate Envelope Hold for Pickup: Priority Mail Express Military™ Flat Rate Envelope Hold For Pickup
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[USPS Priority Mail Express Sunday/Holiday Guarantee]
USPS Priority Mail Express Sunday/Holiday Guarantee: Priority Mail Express™ Sunday/Holiday Delivery
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USPS Priority Mail Express 1-Day Sunday/Holiday Guarantee: Priority Mail Express 1-Day™ Sunday/Holiday Delivery
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USPS Priority Mail Express 2-Day Sunday/Holiday Guarantee: Priority Mail Express 2-Day™ Sunday/Holiday Delivery
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USPS Priority Mail Express 3-Day Sunday/Holiday Guarantee: Priority Mail Express 3-Day™ Sunday/Holiday Delivery
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USPS Priority Mail Express DPO Sunday/Holiday Guarantee: Priority Mail Express DPO™ Sunday/Holiday Delivery
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USPS Priority Mail Express Military Sunday/Holiday Guarantee: Priority Mail Express Military™ Sunday/Holiday Delivery
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[USPS Priority Mail Express Flat-Rate Envelope Sunday/Holiday Guarantee]
USPS Priority Mail Express Flat-Rate Envelope Sunday/Holiday Guarantee: Priority Mail Express™ Sunday/Holiday Delivery Flat Rate Envelope
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USPS Priority Mail Express 1-Day Flat-Rate Envelope Sunday/Holiday Guarantee: Priority Mail Express 1-Day™ Sunday/Holiday Delivery Flat Rate Envelope
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USPS Priority Mail Express 2-Day Flat-Rate Envelope Sunday/Holiday Guarantee: Priority Mail Express 2-Day™ Sunday/Holiday Delivery Flat Rate Envelope
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USPS Priority Mail Express 3-Day Flat-Rate Envelope Sunday/Holiday Guarantee: Priority Mail Express 3-Day™ Sunday/Holiday Delivery Flat Rate Envelope
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USPS Priority Mail Express DPO Flat-Rate Envelope Sunday/Holiday Guarantee: Priority Mail Express DPO™ Sunday/Holiday Delivery Flat Rate Envelope
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USPS Priority Mail Express Military Flat-Rate Envelope Sunday/Holiday Guarantee: Priority Mail Express Military™ Sunday/Holiday Delivery Flat Rate Envelope
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If for some reason one or more of these codes don�t match up with what displays in your Admin Area, you can manually change them using these steps:
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Go to Settings > Shipping and locate the Live Rates section.
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Click the name of the active method you want to modify.
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Expand the Advanced Settings section to expose the Service Code field.
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Enter the correct service code.
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Click Save.
?? Don�t Delete.
Deleting a record from your store�s Shipping Table is permanent. We recommend de-activating any shipping methods you don�t want to offer at checkout. Simply deselect the Active check box within each method or on the main Shipping page and click save.