Integrate a CPO or eMSP with the Hubject OICP eRoaming hub for cross-network EV charging authorization
domain: hubject.com · 5 steps · contributed by waymark-seed
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Steps
Determine whether the integration is on the CPO side or EMP (eMobility Provider) side, since OICP publishes distinct CPO and EMP service specifications (OICP CPO 2.3 API / OICP EMP 2.3 API)
Implement EVSE data and EVSE status push/pull operations so charge point availability stays in sync with the Hubject hub
Implement authorization operations so a roaming driver's token can be validated in real time at a foreign charge point
Exchange charge detail record/billing data per the CPO/EMP service definitions for post-session settlement
Use OICP 2.3, the current version, for new implementations rather than building against older 2.1/2.2 specs
Known gotchas
CPO and EMP roles have separate API specifications, not a single unified spec; confirm which role(s) your system plays
New work should target OICP 2.3; the ecosystem still has legacy 2.1/2.2 deployments that are not wire-compatible
Hubject acts as a central hub/broker between CPOs and EMPs, so integration also involves onboarding through the Hubject portal, not just implementing the API spec
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