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 — no need to sign up again.

Generate an API Key

Navigate to API Keys in your API portal. Click "Create New Key" and give it a descriptive name. Choose between two tiers:

Make Your First Request

Test your API key by making a simple tariff calculation request:

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}'

You'll receive a tariff calculation with duty rates and amounts:

{
  "hts_code": "8471.30.01",
  "description": "Portable digital automatic data processing machines...",
  "total_tariff_rate": 145,
  "total_duty": 14500,
  "remaining": 4
}

Free tier includes 5 API calls per day. Upgrade to Tariff Pro for 10,000 calls/month.

Explore the API Reference

Now that you're connected, explore the full API reference to discover all available endpoints including tariff calculation, AI HTS search, container tracking, and parcel quotes.