How do I get USPS Media Mail and Library Mail rates on EasyPost?

In order to receive USPS Media Mail or Library mail rates you will need set the Shipment Option special_rates_eligibility to "USPS.MEDIAMAIL" or "USPS.LIBRARYMAIL" respectively. You can read more about this in our documentation here.

As a reminder, you'll need to set this in the Shipment Options array in order to display the correct rates.

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