This API allows you to process a Vantiv transaction through triPOS. The API supports null lane IDs that allows payment transactions to flow through the system without the need for hardware. This includes; Generate a request package, Create Message Headers, Send the request to triPOS and more. The Express API is a server-side web-service application that communicates over secure HTTPS links to the Internet that is handled via XML or SOAP. Vantiv provides online or in-store payment processing solutions, payment applications for a mobile application, next generation POS, and eCommerce website solutions, for various partners, as well as the customers they serve.