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by charlesz 3658 days ago
Oh man, oh man. Don't get me started on the utter mess that the UPS and FedEx APIs are. I've gone through the app certification process for both, as well as Stamps.com (USPS), and I think the only other project that rivals that mess is ADP (development took over a year, certification took another 6 months and 10s of thousands in fees.)

As an example, the developer document solely for obtaining shipment rates is 98 pages long.