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API · /geoconvert-api

Coordinate Conversion API

healthy 4,692 Subscribers

Convert geographic coordinates between every common format. Turn a latitude/longitude pair into a Plus Code (Open Location Code, as used by Google Maps), an MGRS reference (Military Grid Reference System), a UTM coordinate (zone, hemisphere, easting, northing) or a DMS string (degrees-minutes-seconds) — and convert any of those back to latitude/longitude. The /v1/all endpoint returns every format at once. Each conversion runs fully locally (no third-party service) so responses are instant and always available. Live, no cache. 6 endpoints. Built for GIS, mapping, surveying, logistics, aviation, emergency services and any app that exchanges coordinates between systems. Complements geohash and CRS lookups without overlap. No upstream key.

#coordinates #gis #plus-code #mgrs #utm #geospatial
api.oanor.com/geoconvert-api
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Machine-readable spec so AI agents can integrate this API.

/api/geoconvert-api/openapi.json
/api/geoconvert-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
84 ms
Server probes · 24h
Subscribers
4,692
active
Total calls
84
last 7 days
status Full status page → · 30 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 1,700 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 1,700 calls/month
  • 2 req/sec
  • Plus Code, MGRS, UTM, DMS
  • No credit card
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Starter

€8.50 /month

  • 37,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 37k calls/month
  • 8 req/sec
  • Bidirectional + /all
  • Email support
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Pro

€27.50 /month

  • 205,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 205k calls/month
  • 20 req/sec
  • GIS / mapping pipelines
  • Priority support
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Mega

€63.50 /month

  • 1,020,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 1.02M calls/month
  • 50 req/sec
  • Platform scale
  • Dedicated SLA
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Built by

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Related APIs

Other APIs with overlapping tags.

UTM Coordinate API

UTM ↔ geographic coordinate conversion as an API, computed locally and deterministically on the WGS84 ellipsoid. The from-latlon endpoint projects a latitude and longitude into the Universal Transverse Mercator grid — returning the zone (1–60), the hemisphere, the latitude band letter, and the easting and northing in metres — using the Snyder/USGS Transverse Mercator series, which is accurate to a few millimetres within a zone; New York (40.7128, −74.0060) maps to zone 18N at about 583960 E, 4507351 N, and the canonical 45°N on a central meridian gives a northing of exactly 4982950.40 m. The to-latlon endpoint inverts it, recovering the latitude and longitude from a zone, hemisphere, easting and northing. Each zone is 6° of longitude wide with a 500000 m false easting on its central meridian and a 10000000 m false northing in the southern hemisphere. Latitude is valid from −80° to 84°. Everything is computed locally and deterministically, so it is instant and private. Ideal for GIS, surveying, mapping, geospatial, drone-mapping and location app developers, coordinate-conversion and grid-reference tools, and spatial software. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 2 endpoints. This is UTM on WGS84; for the polar regions use UPS and for an EPSG-code lookup use an EPSG API.

api.oanor.com/utm-api

Geohash API

Work with geohashes through a fast, fully-local API. Encode a latitude/longitude pair into a geohash at any precision (1–12), decode a geohash back to its centre coordinates with the exact bounding box and error margins, list the eight neighbouring geohash cells (north, north-east, east and so on), or get the bounding box, centre and dimensions of a cell. Geohashes turn coordinates into short sortable strings that are perfect for spatial indexing, proximity grouping and map tiling. Pure server-side computation with no third-party upstream, so responses are instant and the service is always available. Ideal for geospatial indexing and search, proximity and nearby queries, map tiles and clustering, IoT and fleet tracking, and location bucketing in databases.

api.oanor.com/geohash-api

Geo Distance API

A fast, fully-local great-circle geospatial toolkit: compute the haversine distance between two coordinates (in km, m, miles or nautical miles), the initial and final compass bearing, the geographic midpoint, the destination point reached from an origin on a bearing at a given distance, and a bounding box around a center for a radius. Pure server-side compute, no third-party upstream, so responses are instant and always available. Ideal for logistics, delivery and fleet apps, store locators, real-estate search, travel and mapping tools.

api.oanor.com/geo-api

Geodesy API

Advanced geodesy beyond the simple great circle. The vincenty endpoint computes the distance between two latitude/longitude points on the WGS84 ellipsoid using Vincenty's inverse formula — accurate to within a millimetre, far better than the spherical approximation — plus the initial and final bearings, in metres, kilometres, miles and nautical miles. The rhumb endpoint computes the rhumb-line (loxodrome) distance and the single constant compass bearing that follows it — the path you steer by holding a heading, as used in marine and air navigation. The cross-track endpoint finds how far a point lies to the left or right of a great-circle path between two points (the cross-track distance) and how far along that path it is (the along-track distance). Everything is computed locally and deterministically, so it is instant and private. Ideal for marine and aviation navigation, surveying and GIS, route analysis, and precise mapping. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. This is advanced geodesy; for simple great-circle distance, bearing, midpoint and destination use a geo-distance API and for coordinate-format conversion use a geo-convert API.

api.oanor.com/geodesy-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Coordinate Conversion API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Coordinate Conversion API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Coordinate Conversion 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 Coordinate Conversion API cost?
Coordinate Conversion API has a free tier with 100 calls / month. Paid plans start at €8.50 / 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 Coordinate Conversion API GDPR-compliant?
All requests to Coordinate Conversion 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/geoconvert-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/geoconvert-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/geoconvert-api/SOME_PATH");
curl_setopt($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/geoconvert-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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