USPS real time rates are a feature that has been long desired, you can always pay a developer but here is a walk through. I was working on other projects and for a long time I had some issues with USPS’ API and it is because their testing server is not all that functional so after sending an email to USPS API support they put my user ID to the production server and I was getting rates! I have to give credit where credit is due and say that Mark Sanborn’s Blog helped me and gave me about 90% of the PHP code needed to get this feature working.

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