March 5, 2026

APIChange TypeRelease DateDescription
OrdersAdded03/05/2026Added enum value USPS First Class Mail to response property .../trackingInfo/carrierName/carrier in

- GET /v3/orders (200),
- GET /v3/orders/released (200),
- GET /v3/orders/{purchaseOrderId} (200),
- POST /v3/orders/{purchaseOrderId}/acknowledge (200),
- POST /v3/orders/{purchaseOrderId}/cancel (200),
- POST /v3/orders/{purchaseOrderId}/refund (200), and
- POST /v3/orders/{purchaseOrderId}/shipping (200).
OrdersAdded03/05/2026Added enum value USPS First Class Mail to request property orderShipment/.../trackingInfo/carrierName/carrier in POST /v3/orders/{purchaseOrderId}/shipping.