As your trusted partner, we want to inform you about upcoming changes to USPS API integration that will enhance security measures for all users. By the end of February, all USPS Web Tools Label API requests must include a password for authentication.
Affected APIs include:
- Domestic eVS
- eVS Express Mail International
- eVS Priority Mail International
- eVS First Class Mail International
- SCAN
- USPS Returns Label
This update requires immediate action to ensure uninterrupted service. Please update your systems to comply with new security requirements.
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Read more on https://www.usps.com/business/web-tools-apis/welcome.htm