Announcements
01/23/2025
INFORMATIONAL - USPS APIs Services Enhancement – Service Standard 3.0 API CHG1016119
Tech Guides
01/23/2025
Current Mail Growth Incentive- Requesting Postage Credit on a Permit
Announcements
01/22/2025
INFORMATIONAL: The Postal Service: We Have the Capacity to Deliver
Announcements
01/22/2025
INFORMATIONAL: Postal Service to Sell Newly Redesigned Money Orders
Announcements
01/22/2025
DELIVERY: WestPac Area - CA-5 District - Topanga Post Office (90290) - Resume Operations
User Guides
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
Licensing Fees

This document contains information about licensing fees for USPS® Licensed Products.

Fact Sheets
01/22/2025
Address Matching System API (AMS API) Licensing Fees

This document outlines the AMS API prorated fee structure. License fees are prorated for the initial license year with a license year beginning October 1 and ending September 30.

Applications/ Forms
01/22/2025
Address Matching System API (AMS API) Order Form

Order form for the AMS API product.

Applications/ Forms
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.