The Global Gateway API (application programming interface service) provides merchants a more sophisticated payment solution through comprehensive payment processing software.

The Global Gateway API service allows customers to pay for products and services without leaving a merchant's Web site. The service provides sales, returns, real-time authorizations and real-time reports, and it calculates tax and shipping — giving merchants control over how their payments are processed. In addition, it allows merchants to build transaction processing applications that can process payments from a Web site or from multiple point-of-sale terminals.