USPS Web Tools™
EVS Label usps Web Tools Application Programming Interface User Guide Version (11/01/2021) usps Web Tools User Guide 2 Table of Contents Introduction ........................................ ........................................ ........................................ ..........................3 Before you get started: ........................................ ........................................ ........................................ ............3 eVS Label API ........................................ ........................................ ........................................ .......................3 Overview ........................................ ........................................ ........................................ ...................................3 API Signature.
• A master Mailer ID is created o Child Mailer IDs are created for each origin site and may be created as needed by the requirements of your business units and brands. • A permit number is created o Additional permit numbers may be created as needed by the requirements of your business units and brands
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