SeaRoutesNav

Developer API

Sea Routes API

Plan sea routes, estimate voyage time, and calculate port distances between ports or coordinates with one REST API call. Built for shipping, logistics, and freight teams that need dependable maritime routing data for maps, quotes, and planning tools.

Get API KeyRead the Docs
Port-to-portCoordinate routingJSON responses
cURL
curl https://api.searoutesnav.com/calculate-route \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "origin": { "port_id": 2451 },
    "destination": { "coordinates": [103.85, 1.29] },
    "speed_kmh": 26
  }'

Maritime routing toolkit

Everything you need for maritime routing

Add port distance calculation, voyage time estimates, canal-aware routing, and clean maritime data to your logistics platform without maintaining your own sea route network.

Port-to-Port Distance

Accurate sea distances between any two ports or coordinates, returned in kilometres.

Voyage Time

Estimated voyage duration in hours, based on the vessel speed you supply.

Canal Routing

Toggle Suez, Panama, Gibraltar and Kiel routing options to match real-world voyages.

Vessel Speed Control

Pass an exact speed in km/h and the API recalculates the voyage duration on the fly.

Clean JSON Responses

Predictable, well-documented JSON payloads that drop straight into your application.

Global Port Coverage

Tens of thousands of ports worldwide, addressable by port id or coordinates, with name autocomplete.

API example

From route request to usable maritime data

Send an origin and destination by port id or coordinates, add vessel speed when you need voyage duration, and receive structured JSON for distance, route geometry, and waypoints. No SDK required.

Distance in kilometresVoyage time in hoursRoute geometry for maps

Request

curl https://api.searoutesnav.com/calculate-route \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "origin": { "port_id": 2451 },
    "destination": { "coordinates": [103.85, 1.29] },
    "speed_kmh": 26
  }'

Response

{
  "success": true,
  "distance_km": 15431.2,
  "duration_hours": 593.5,
  "route_coordinates": [[4.14, 51.95], ...],
  "waypoints": [[4.14, 51.95], ...],
  "message": "Route calculated: Rotterdam → Singapore"
}

Start building with the Sea Routes API

Create a free account to get your API key, then explore pricing as your usage grows.

Get API KeyView Pricing