The **onboard‑api‑discovery** tool scans the Wi‑Fi network you’re connected to on a public‑transport vehicle and probes a catalog of known “onboard” APIs that expose vehicle‑location, journey and Wi‑Fi status data. It’s aimed at developers, transport‑enthusiasts and researchers who want to map, reverse‑engineer, or simply use these otherwise hidden vehicle‑local APIs, and it also provides a framework for adding new endpoints and contributing findings to a shared documentation effort.