This developer guide teaches you how to get access to USPS shipping API via Postmen, and enjoy discounted USPS shipping rates at Commercial Plus Pricing (CPP) and Cubic Pricing. See also the list of required API credentials / keys for USPS shipping API integration.
IN THIS ARTICLE
Use Postmen's USPS account or your carrier account?
If you use Postmen's USPS account, you can immediately enjoy discounted USPS rate at CPP Commercial Plus Pricing and Cubic Pricing (see USPS Rate Chart).
If you use your own carrier account, the shipping cost depends on your shipping volume and carrier agreement. Your carrier will bill you directly for the actual cost of shipping.
Get USPS API Credentials
- Register or login to a free postmen account
- Get your Postmen API key at
Required USPS ShippingAPI credentials
||Sandbox / Production||Your Postmen API key to access USPS shipping API and Postmen API.|