Tag
Move retired Web Tools code to USPS v3
Find the old endpoint first, then replace its fields, authorization, and failure behavior. This hub groups the guides needed for that sequence without mixing in general shipping content.
7 reviewed guides
01
Retired endpoint and field mapping
02
OAuth and access-control changes
03
Cutover tests and production repair
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usps-api and usps-webtools Are Dead: the 2026 Replacement
The usps-api, usps-webtools, and usps-webtools-promise packages target an API that no longer exists. The errors you are seeing, and the one-command swap.
9 min readUSPS v3 Migration Guide: Node.js and Python, XML to REST
Every Web Tools operation rewritten in the usps-v3 Python and Node SDKs, with the exact method names, the field that silently fails, and a cutover playbook.
15 min readUSPS Web Tools to v3 REST API: Complete Endpoint Mapping
Every Web Tools XML API mapped to its v3 REST route, with the auth change, the reversed address fields, and the gotchas that break production migrations.
12 min readUSPS Web Tools Migration Checklist (2026)
A numbered checklist for moving off USPS Web Tools XML: endpoint map, the license now required, OAuth, field mapping, error mapping, and the cutover.
14 min readUSPS Web Tools Shut Down on January 25, 2026: What Broke and the Fastest Way to the v3 API
USPS retired Web Tools on January 25, 2026. If ShippingAPI.dll, USERID, or secure.shippingapis.com is failing, map the XML route to v3 REST here.
10 min readWooCommerce USPS Migration: From Web Tools to the v3 REST API
USPS Web Tools died January 25, 2026. Update the official extension to 5.2.5, enter REST credentials, and handle the 60-per-hour cap it does not cache.
9 min readUSPS Web Tools Migration: XML to v3 REST, End to End
Every Web Tools endpoint mapped to its v3 REST equivalent, the OAuth flow in three languages, the field swap that corrupts addresses, and the 60/hr wall.
12 min read