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.
- Technical Reference Guide Using an Access Token and iFrame
- Example of i4Go in an iFrame (i4m)
- Technical Reference Guide Using an Access Token
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.