ShipmentBeat is a prepaid workspace for ocean container tracking. Freight teams track bills of lading, containers, and bookings in one place — status, vessel, ETA, and exceptions — instead of hopping between carrier portals and spreadsheets. Track from $0.50 per container, capped at $2 per shipment. Sign up with 50 free credits, no card. Copy a demo shipment and verify it on the carrier's own site. REST API and signed webhooks, no sales call.