The Endicia API Shipping Labels plugin for Zen Cart allows store owners to create USPS shipping labels from within the admin. The plugin uses stored data from the order to pre-populate the shipping form for maximum time savings. It also automatically updates the order status and sends the custmer and email with their tracking number.
For larger stores, bulk label creation is supported and even integrates with Shipping Boxes Manager to provide accurate package information to Endicia. This minimizes the need for human interference and further streamlines the shipping process.