Ports within a radius of a coordinate
API · /seaports-api
Seaports API
healthy
3,415 Subscribers
The NGA World Port Index (WPI / Pub 150) as an API — 3,800+ maritime ports across 195 countries. Look up any port by its WPI number (e.g. 31140 → Rotterdam) or UN/LOCODE (e.g. NLRTM); search by name, country, harbor size or water body; or find every port within a radius of any coordinate (great-circle distance). Each record carries the UN/LOCODE, country, coordinates, harbor size and type, channel/anchorage/pier depths, maximum vessel length and draft, plus facility flags (container, oil/LNG terminal, ro-ro, dry dock, …). Ideal for shipping, logistics, maritime and supply-chain tools.
api.oanor.com/seaports-api
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 77 ms
- Server probes · 24h
- Subscribers
- 3,415
- active
- Total calls
- 80
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 3,000 calls / month
- 2 requests / second
- Hard cap (429 above quota, no overage)
- 3,000 calls/month
- 2 req/sec
- Lookup + search + nearby
- No credit card
Starter
€6.50 /month
- 45,000 calls / month
- 8 requests / second
- Hard cap (429 above quota, no overage)
- 45k calls/month
- 8 req/sec
- Geospatial nearby search
- Email support
Pro
€16.50 /month
- 250,000 calls / month
- 20 requests / second
- Hard cap (429 above quota, no overage)
- 250k calls/month
- 20 req/sec
- Logistics / shipping tools
- Priority support
Mega
€43.00 /month
- 1,200,000 calls / month
- 50 requests / second
- Hard cap (429 above quota, no overage)
- 1.2M calls/month
- 50 req/sec
- Supply-chain platform
- Dedicated SLA
Built by
Related APIs
Other APIs with overlapping tags.
Seaports API
Search a database of 17,000+ seaports worldwide from UN/LOCODE. Find ports by name and country, look one up by its UN/LOCODE, or find all ports near a coordinate (radius search). Each record includes the UN/LOCODE, coordinates, country and connected transport modes (rail, road, airport) — ideal for shipping, freight, supply-chain and logistics applications.
api.oanor.com/ports-api
IP Exposure API
See what any host exposes to the internet — as an API over Shodan's free InternetDB. Give it an IPv4/IPv6 address (or a hostname, which is resolved to its IP) and get that host's attack surface: the open ports (annotated with common service names), the products and technologies detected on it (CPEs), its reverse hostnames, Shodan's classification tags, and the known vulnerabilities (CVE identifiers) observed on its services. A dedicated vulnerabilities view returns just the CVEs and whether the host appears vulnerable. It is fast, requires no key, and is built for security, asset-discovery, external attack-surface monitoring and reconnaissance workflows. A network-exposure / attack-surface resource — distinct from IP geolocation (where an address is), the IANA port registry (what a port number means) and CVE databases (what a vulnerability is). Data from Shodan InternetDB (free / non-commercial use).
api.oanor.com/internetdb-api
UN/LOCODE API
The UN/LOCODE registry (United Nations Code for Trade and Transport Locations) as an API — 116,000+ ports, airports, rail and road terminals and trade points across 249 countries. Resolve any 5-character code (e.g. USNYC → New York; DEHAM → Hamburg; NLRTM → Rotterdam) to its name, country, subdivision, transport functions (port, rail, road, airport, postal, …), IATA code and coordinates; search locations by name with country and function filters; or list every location in a country. UN/LOCODE is the standard used in shipping, logistics, customs and EDI. Ideal for supply-chain, freight, trade-compliance and logistics software.
api.oanor.com/locode-api
Ship Stability API
Ship initial-stability maths as an API, computed locally and deterministically — the metacentric-height, righting-moment and rolling-period numbers a naval architect, ship officer or marine-surveyor judges a vessel by. The metacentric-height endpoint gives GM = KM − KG, the single most important stability figure: the height of the metacentre (set by the hull form and draught) above the centre of gravity (set by how the ship is loaded), with a classification from a dangerous negative GM, through tender and comfortable, to a stiff GM that rolls violently — naval architects aim for the middle, because too little is unsafe and too much is hard on cargo and crew. The righting-moment endpoint gives the small-angle righting arm GZ ≈ GM · sin(heel) and the righting moment (GZ × displacement) that pushes the ship back upright, valid up to roughly 7–10° before the true GZ curve bends away. The roll-period endpoint gives the natural transverse rolling period T = 2π·k / √(g·GM) from the GM and beam — the same relation sailors run in reverse as the rolling-period test, where a suddenly longer roll warns that GM has dropped. Everything is computed locally and deterministically, so it is instant and private. Ideal for naval-architecture and ship-design tools, marine-surveyor and loading-software utilities, maritime-training apps and stability dashboards. Pure local computation — no key, no third-party service, instant. Initial-stability estimates — use full KN cross-curves for large angles. 3 compute endpoints. For hull speed and design ratios use a sailing API.
api.oanor.com/shipstability-api
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for Seaports API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Seaports API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Seaports API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Seaports API cost?
Seaports API has a free tier with 100 calls / month. Paid plans start at €6.50 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Seaports API GDPR-compliant?
All requests to Seaports API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.
Pick an endpoint from the list on the left to see its details and try it.
Code snippets
Sign up to get an API key, then call any path under your slug.
curl https://api.oanor.com/seaports-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/seaports-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/seaports-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);import requests
r = requests.get(
"https://api.oanor.com/seaports-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
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