Web Tools has been retired effective January 25, 2026. Please follow the Getting Started Instructions at https://developers.usps.com/getting-started to utilize the new USPS API platform at the Developer Portal. For migration support, go to https://emailus.usps.com/s/usps-APIs select the Onboarding radio button and API issue of API Onboarding/Upgrade. Review the latest Industry Alert at https://postalpro.usps.com/node/14807.