Boxping is a tiny HTTP API: GET /v1/track?id=CONTAINER returns JSON (id, carrier, last_event, vessel, eta, source, cached). It parses public Maersk track-and-trace HTML only. Not MSC, not AIS, not MarineTraffic. Demo ids MSCU1234567 and MSKU0072092 are labeled source:fixture when live parse fails. Price: $0.12 live / $0.05 cached / $5 Polar API key. Demo GET is open. Live: https://hence-lovers-deborah-located.trycloudflare.com/v1/track?id=MSCU1234567
I needed one JSON GET for an ocean container number. Tracking APIs I opened wanted an annual API usage fee on top of credits. I built a small parser of the public Maersk page, with fixtures labeled honestly, and a $5 Polar key.