The Worldpay cnpAPI Reference Guide is a comprehensive reference for the Worldpay eComm cnpAPI 12.x schema version, and includes information on transaction formats used for card-not-present processing with Worldpay. The cnpAPI reference guide also includes feature overviews, information for testing and certification, XML examples, and a complete data dictionary. This document is intended for technical personnel who will be setting up and maintaining payment processing using the cnpAPI format. A PDF download of this guide is available at the bottom of the page.
