Tech Guides
01/23/2025
01/23/2025
Announcements
01/22/2025
01/22/2025
Announcements
01/22/2025
01/22/2025
Announcements
01/22/2025
01/22/2025
User Guides
01/22/2025
01/22/2025
Domestic Merchant Returns API: User Guide
This user guide provides examples of XML transactions to the USPS Merchant Returns web service and guidance for installation.
Fact Sheets
01/22/2025
01/22/2025
Licensing Fees
This document contains information about licensing fees for USPS® Licensed Products.
Fact Sheets
01/22/2025
01/22/2025
Applications/ Forms
01/22/2025
01/22/2025
Address Matching System API (AMS API) Order Form
Order form for the AMS API product.
Applications/ Forms
01/22/2025
01/22/2025
Address Matching System API (AMS API) License Agreement Modifications
This Modifications document lists the changes to the current Address Matching System Application Program Interface (AMS API) Product License Agreement.
Announcements
01/21/2025
01/21/2025