Gateway API Platform
Build freight forwarding into your application. Shipment management, live satellite tracking, tariff calculations, and document automation through a single REST API.
Available APIs
All endpoints available on the free tier. No credit card required.
Tariff Calculator
Calculate US import duties including IEEPA, Section 301, reciprocal tariffs, AD/CVD, and more. Returns full duty breakdown.
AI HTS Code Search
Describe any product in plain English and get the correct HTS classification with AI-powered matching.
Container Tracking
Track any ocean container worldwide with satellite AIS data, real-time position, ETAs, and event timeline.
3D Load Planner
Calculate optimal container loading. Get volume/weight utilization, FCL vs LCL recommendations, and fit analysis.
Parcel Quotes
Get instant USPS, UPS, and FedEx shipping rates for US domestic parcels. Compare carriers side-by-side.
Need more?
Higher limits, shipment management, LTL freight, webhooks, and EDI integration.
Contact SalesFast Integration
Simple REST API with JSON responses. Get your first result in under 5 minutes.
Always Up-to-Date
Tariff rates updated daily. Tracking data refreshed every 30 minutes via satellite.
99.9% Uptime
Enterprise-grade infrastructure. Automated health monitoring and status page.
Simple, powerful API
One POST request to calculate import duties for any product.
curl -X POST https://api.gatewaylines.com/api/tariff/public/calculate \
-H "Content-Type: application/json" \
-H "X-API-Key: tariff_YOUR_API_KEY" \
-d '{
"hts_code": "8471.30.01",
"country_code": "CN",
"declared_value": 10000
}'Simple Pricing
Start free, upgrade when you need more.
Free
API access only. No credit card required.
Tariff Pro
Unlimited tariff API + built-in dashboard tools.
Ready to get started?
Create a free account and make your first API call in minutes.