USPS Web Tools will be retiring the RateV3 API next month (targeted date is September 28th). To keep up with the latest update, Business Catalyst is going to update the API integration on Monday, August 18th 2014.
Following the transition, the Parcel and BPM shipping options will be retired and will no longer be available in the new API. To reduce impact on customers, Business Catalyst will update all sites using these shipping options to replace them with Standard Post. All the other options will remain unchanged.