USPS sent out an email saying:
As communicated first in May 2011, outdated versions of the Web Tools Domestic Rate CalculatorĀ API (Rate and RateV2) will be retired on March 31, 2012. At that time, requests to the Rate andĀ RateV2 APIs will result in error message responses.
If you have a web store that may be using the USPS shipping module, your rates may no longer be working due to USPS retiring their old system. We are happy to offer an updated patch that works with their new system for $40. If you need this patch, please email us and we will get an order going for you ASAP.
Thanks!
Nerd Group
info@nerdg.com
Nerd Group LLC is a small Local SEO, Web Design and Web Marketing Firm based in San Diego, Las Vegas and Ventura, Ca. Specializing in working with small to medium sized businesses, we will assist your company in Local Web Marketing, Web Site Development, Web Promotion, Search Engine Optimization, Search Engine Marketing and Online Advertising.