OCPI Test Tool — the standard's reference implementation

OCPI had no public reference implementation for years. Vendor stacks looked correct in isolation and only revealed endpoint-level disagreements once two networks tried to roam in production — by which point customers had already hit them. The Foundation needed a vendor-neutral tool so any party could validate its stack up-front.

ihomer designed and built the OCPI Test Tool for the EVRoaming Foundation. The tool implements every endpoint of OCPI 2.2.1 and earlier versions. It runs as both sender and receiver: a CPO or eMSP can validate its own stack against it before a real roaming connection goes live.

The tool is open source and hosted by the Foundation. ihomer engineers co-author the OCPI specification in the working groups, so the tool stays in step with the standard.

The Test Tool is in practice the pre-production OCPI checker most implementations run through before requesting a live roaming connection. [VERIFY: number of CPOs/eMSPs using the tool in certification flows — figure lives in the Foundation's reporting.]