The Open Charge Point Interface protocol is a scalable and automated EV roaming protocol for communication between MSPs and CPOs. It is managed by the EVRoaming Foundation. OCPI focuses on real-time communication between charge point operators. Its advantage lies in its simplicity, making it easy to implement and allowing for dynamic pricing and seamless roaming. This protocol is free to use and independent. It can work both bilateral as well as in combination with roaming hubs.