On August 24, 2025, the United States Postal Service redirected its Label, Service Standards, Pricing, and Addressing APIs from on-premises environments to the cloud environment. As part of this modernization, USPS decommissioned the legacy infrastructure supporting USPS API V3.
To ensure uninterrupted service, all customers will be automatically migrated to the new Cloud-based APIs. For more information, please review the Industry Alert.
For the latest USPS API documentation for the cloud environment, please visit the updated Developer Portal.
Description
Shipment Confirmation Acceptance Notice(SCAN) form allows integrators to link multiple domestic and international labels through one Electronic File Number (EFN) and physical SCAN Form (PS Form 5630).