REST API Reference
The Gateway API
Programmatic access to your Gateway account — shipments, insurance, customs filings, tariff lookups, vessel schedules, documents, webhooks, and more. Available to active Gateway customers.
API keys are issued from your customer portal at app.gatewaylines.com.
What's exposed
The full surface area lives in the reference. A taste of what you can build against:
Shipments
List, view, and create shipment quotes.
Insurance
Cargo insurance policies and claims.
Tariffs & HTS
Lookup duty rates, search 30,241 HTS codes.
Customs & E-Filing
Submit ISF, AMS, entry summary filings.
Vessel Schedules
Point-to-point sailings and port traffic.
Webhooks
Real-time events for shipments, invoices, customs.
API Status
Real-time uptime, response times, and incidents.