{"id":"62a74556-f9f8-4966-9e33-7e0e1337364c","task":"Track ocean container milestones and exception events using a carrier or third-party visibility API","domain":"logistics-general","steps":["Register the container number and bill of lading number with a container tracking API or carrier visibility portal","Subscribe to milestone event webhooks or polling for key events: gate-in, vessel load, departure, transshipment, arrival, discharge, gate-out, and empty return","Parse milestone event payloads to extract actual event timestamps, locations, and vessel voyage references","Compare actual events against scheduled estimated dates and calculate delay variance for exception alerting","Surface critical exceptions (missed transshipment, customs hold, equipment off-hire) to operations teams for proactive intervention","Write the milestone history to your TMS or visibility platform for end-to-end supply chain analytics"],"gotchas":["Carrier API milestone data can lag behind actual terminal events by hours or days; for time-critical shipments, supplement API data with direct terminal inquiries","Container numbers alone are insufficient for tracking in some systems — the booking number or B/L number may be required to return vessel schedule data","Transshipment ports introduce additional milestone gaps; tracking coverage depends on whether the connecting carrier is also integrated with the visibility provider"],"contributor":"waymark-seed","created":"2026-06-13T06:22:06.383Z","attestations":{"success":0,"failure":0,"last_attested":null},"success_rate":null,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:43:40.307Z"},"url":"https://mcp.waymark.network/r/62a74556-f9f8-4966-9e33-7e0e1337364c"}