EV Roaming Tester
OCPI Testing for CPOs & eMSPs
Free OCPI testing tool supporting versions 2.1.1, 2.2, and 2.2.1 for CPOs and eMSPs. Simulate EV roaming, validate protocol compliance, and debug interoperability issues. No signup required.
Interactive simulator loading
This is a shareable preview of EV Roaming Tester. The full interactive simulator runs in your browser with JavaScript enabled.
Use it to validate OCPI integrations, explore message flows, and reproduce roaming issues between CPO and eMSP systems without installing anything.
Key capabilities
- Simulate CPO and eMSP roles in one browser session
- Validate OCPI request/response payloads and common edge cases
- Visualize message flows and charging-session lifecycle events
- Inspect logs to debug roaming interoperability issues
- Share reproducible scenarios with your team
Common workflows
Teams usually begin by defining one test objective and one expected outcome, then running a controlled scenario and inspecting sequence behavior. This makes triage faster and avoids noisy debugging sessions.
- Validate OCPI endpoints by sending sample requests and inspecting responses for protocol correctness.
- Reproduce a roaming issue by simulating a full session lifecycle and comparing message order and payloads.
- Review message flows to align engineering and product teams on expected CPO ↔ eMSP interactions.
- Capture logs and share a single URL to discuss a specific scenario with teammates.
Related resources
- EV Roaming Tester for end-to-end interoperability workflows.
- EV Charging Simulator for visual sequence analysis.
- OCPI Testing Tool for structured protocol validation.
- Learn OCPI for terminology and implementation guidance.