AISHub
AISHub is a cooperative AIS (Automatic Identification System) data sharing network for vessel tracking. Members who contribute a raw NMEA AIS feed from their own receiver (via UDP) get free access in return - a real-time aggregated feed from 1,500+ stations across 80 countries, plus an HTTP web service that returns vessel positions and station metadata as XML, JSON, or CSV. There is no pay-for-access tier; API credentials are earned by sharing a feed that meets coverage and uptime quality thresholds.
APIs
AISHub Vessel Positions API
Returns the latest known position and voyage data for vessels tracked by the AISHub network - MMSI, coordinates, course, speed, heading, navigational status, IMO, name, callsign...
AISHub Stations API
Returns metadata about the receiving stations that make up the AISHub network, filterable by station id, with the same XML/JSON/CSV output and compression options as the vessel ...