API Corner

Welcome to Shift4 Payments' API Corner!

Shift4 Gateway API

The Gateway API is the primary API for communicating with Shift4.


i4Go secures cardholder data (CHD) in e-commerce business environments by intercepting CHD at the point of entry - so it never enters the merchant's web server.


4Res is a cardholder data firewall that sits between the external reservation system (RES) and a hotel's property management system (PMS) and allows CHD to be tokenized before it enters the hotel's environment.