An AIS port congestion API returns occupancy for a catalog port. Vessels API exposes congestion next to GET /api/V1/ports. The official sibling sample uses port_id=84.
Starter $19.99/mo, 7-day trial. This is not FreightPulse PortWatch.
Request
curl -H "X-API-Key: YOUR_API_KEY" "https://vessels-api.com/api/V1/ports"
Take a port_id (docs sibling 84) into the congestion path. Do not invent a wait-time hour.
Go live
1. Register — 7-day trial.
2. Copy the X-API-Key.
3. GET /api/V1/ports then congestion with port_id.
4. Store the live occupancy fields.





