USPS APIs Migration Webinar Guide

This guide provides information regarding the migration from USPS Web Tools APIs to the new USPS APIs, which will be retired on January 25, 2026. It outlines the steps for onboarding to the new API platform, including how to generate an OAuth token, which is necessary for accessing the new APIs. The document details the availability of a test environment for mailers (TEM) that mirrors the production environment, allowing users to test API requests before going live. It also specifies that existing USPS Web Tools credentials are not compatible with the new APIs. Users are advised to contact their third-party platform providers for migration assistance and to utilize the daily migration Zoom calls for support. Additionally, the guide mentions that there are no costs associated with using the new USPS APIs for valid shipping and mailing purposes, and it provides contact information for technical support and feedback.