ShopSite Knowledgebase

May 8, 2014 email from USPS regarding USPS Web Tools Rate V3 retirement on September 28, 2014

Product: Manager and Pro
Version: ShopSite 11 sp2 r5 and earlier
Platform: Linux, FreeBSD, Windows 2003/2008 Server

I received an email notification from USPS that on September 28, 2014 they would be retiring their USPS Web Tools RateV3 API. Does this affect my ShopSite? Is there anything that I need to do?

The USPS Rate V4 API option was implemented in ShopSite 12 in November 2013. If you have ShopSite 12, 12 r1, or 12 r2, make sure that the 'Rate API Version' setting in Commerce Setup -> Shipping -> Configure U.S. Postal Service is set to the V4 option (the default).

Patches for the ShopSite 11 sp2 r5 maintenance release that use the new RateV4 API are also available.

If you have a version of ShopSite Manager or Pro that is older than ShopSite 11 sp2 r5 and if you want to continue to use the USPS real-time rates in your shopping cart beyond the USPS Rate V3 retirement date you will need to upgrade your ShopSite to version 12 or newer or upgrade to 11 sp2 r5 or newer and apply the patches. Contact your ShopSite reseller/hosting provider to request an upgrade and/or the patches.

UPDATE: it appears that as of October 5th 2014 USPS has shut down the V3 API, so any ShopSite 11x or older store using USPS real-time rates and not updated or patched as described above will NOT display USPS rates and will have the following error message displayed to the shopper after they enter their postal code:

USPS Message: API Disabled: RateV3. The RateV3 API is no longer available. Please follow the "RateV3 to RateV4" transition guide in the announcements section at to migrate to the latest version or contact your software provider or shipping administrator for assistance.

The 5/8/2014 email sent by USPS is as follows:

Sent: Thursday, May 08, 2014 10:27 AM
Subject: USPS Web Tools Rate V3 Retirement


USPS Web Tools will be retiring our RateV3 API later this year (target date: September 28, 2014). We encourage you to upgrade to RateV4 to avoid any disruption in service. For detailed instructions on upgrading to RateV4, please see the RateV4 Transition Guide on the Web Tools site under Web Tools Announcements.

To ensure we have the best contact information for you, please complete our four-question contact form by clicking the link below:
Web Tools Contact Form

To receive future Web Tools updates, follow us on Twitter @USPSWebTools. If you have any questions, encounter any issues, or have any feedback, please email us at

Thank you,
USPS Web Tools Program Office

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Last Updated
28th of May, 2014

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