Retrieve EVIR vehicle inspection reports and defect details via Zonar's OMI API

Steps

1. Send calls to the single OMI endpoint (omi.zonarsystems.net/interface.php) rather than older per-account subdomain URLs.
2. Authenticate each request with your GTC account code (customer parameter) and a username/API-password pair enabled for API access, noting this API password can differ from that user's GTC web-login password.
3. To list new or changed inspections, call action=showopen with operation=insp, supplying a start (and optionally end) Unix epoch timestamp and a status filter; the older equivalent action=extgetnewinsp is deprecated.
4. Take the inspection id from the list response and call action=showopen&operation=showinsp&target={id} to fetch full inspection detail, including per-zone status, defects, and the fitness-for-duty (ffd) flag.
5. Set version=2 in the request if you need multi-asset inspections (e.g., tractor+trailer), since the version 2 response schema differs structurally from version 1.
6. Confirm the calling API user has the GTC permission mapped to the action/operation you're calling, since each documented call requires a specific enabled permission.