Getting Started

Create an API Account

Sign up for a free API account at api.gatewaylines.com/signup. Once registered, you can generate API keys and start making requests immediately.

Already a Gateway shipping customer? You can log in with your existing account.

Generate an API Key

Navigate to API Keys in your API portal. Click "Create New Key" and give it a descriptive name.

Make Your First Request

Test your API key with a tariff calculation:

curl -X POST "https://api.gatewaylines.com/api/tariff/public/calculate" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: gw_your_key_here" \
  -d '{"hts_code": "8471.30.01", "country_code": "CN", "declared_value": 10000}'

Response:

{
  "hts_code": "8471.30.01",
  "description": "Portable digital automatic data processing machines...",
  "total_tariff_rate": 145,
  "total_duty": 14500,
  "remaining": 99
}

Explore All Endpoints

Check the full API reference for all available endpoints: tariff calculation, AI HTS search, container tracking, CO2 emissions, port congestion, 3D load planner, and parcel quotes.