OICP

Open InterCharge Protocol: the roaming protocol of the Hubject platform.

Explained in

EV charging fundamentals · Stop 03What happens after you tap your card?Follow one tap from the card reader to the operator's backend and, for another company's card, across the roaming route and back. OCPP and OCPI in action.

A simple way to keep them apart: OCPP stays with the charge point, OCPI works between companies. OCPI is not the only roaming protocol. The Hubject platform, for example, uses its own protocol, OICP.

From “Two protocols with two jobs”, stop 03

Also in

  1. EV charging fundamentals · Stop 08What standards make all of this work?Four standards, four connections
  1. OCPPOpen Charge Point Protocol: the open protocol between a charger and its operator's backend.
  2. OCPIOpen Charge Point Interface: an open protocol for roaming between operators and e-mobility service providers.
  3. RoamingCharging in another company's network with your own card or app.
  4. Roaming hubA platform that connects many operators and service providers, each through one connection.
  1. Hubject: Open InterCharge Protocol (OICP), specification on GitHub. https://github.com/hubject/oicp. Checked 07 Oct 2026.