Technical Specifications
12/12/2025
Informed Delivery API Technical Specifications V1.0_5.0
Technical Specifications
12/05/2025
Mail.dat Technical Specifications R63.0.0.0
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11/28/2025
NCOA API Specifications
Technical Specifications
11/12/2025
Addressing API Specifications
Technical Specifications
11/12/2025
Addressing API - Vendors
Technical Specifications
11/12/2025
Addressing API - End Users - Tech Sheet
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National Change of Address - API
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10/31/2025
Mail.xml Technical Specifications R63.0.0.0
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Intelligent Mail Container Barcode Technical Specifications

Technical specifications for printing the USPS Intelligent Mail® Container barcode (IM™ Container barcode). The Intelligent Mail Container barcode is used on mailer-generated pallet labels to uniquely identify pallets and similar containers (i.e. All Purpose Containers, hampers, pallet boxes, etc.) in addition to identifying the mail owner.

Technical Specifications
06/27/2025
Enterprise Payment System IV-MTR Data Elements