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January 27th USPS Web Tools Update: USPS Web Tools will be implementing changes and additional features to the U.S. Postal Service APIs listed below effective January 27th, 2014 with testing available January 13th. Detailed release notes are available on the USPS Web Tools Developer Page here: http://j.mp/18dTBs1. Please follow @USPSWebTools on Twitter for Web Tools Updates.