US flag Official website of the Department of Homeland Security

Mobile Nav Button


Technical Documentation for All CBP Automated Systems

These pages provide the message formats and technical specifications necessary to electronically transmit data to CBP's automated systems.

Automated Commercial Environment (ACE)

By 2016, ACE will become the Single Window, the primary system through which the international trade community will submit data and documentation required by the federal government for imports and exports, and through which the government will determine admissibility. As more cargo processes are modernized and implemented in ACE, corresponding capabilities will be decommissioned in ACS and AMS.

The ACE Technical News and Supplemental Guidance page provides information regarding newly deployed ACE capabilities, including interim measures that need to be taken to ensure the facilitation of cargo processing and other technical news of interest to ACE filers and vendors.

Please use the hyperlinks provided below to access documents with the technical specifications needed to electronically transmit data to ACE.

Import Manifest
Entry / Entry Summary

Legacy Systems

These links contain detailed requirements for filing information to legacy systems including ACS ABI CATAIR technical requirements.

Entry / Entry Summary