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API · /polyline-api

Polyline API

healthy 4,297 Subscribers

Encode and decode Google/Mapbox encoded polylines — the compact ASCII string used by the Google Maps Directions API, Mapbox, Valhalla, OSRM and GPX-style route geometry to pack a list of coordinates into a few bytes. Decode an encoded string into an array of latitude/longitude points, encode a coordinate list back into a polyline (precision 5, the Google default, or 6 for OSRM/Valhalla overview), and measure a path — point count, total length by the haversine great-circle formula in km and miles, and the bounding box. Perfect for drawing routes on a map, storing tracks compactly, computing trip distance and fitting a map viewport. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. Distinct from coordinate-format conversion (Plus Code/MGRS/UTM) and geohash.

#polyline #maps #routing #geometry #gps #developer-tools
api.oanor.com/polyline-api
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Machine-readable spec so AI agents can integrate this API.

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

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

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
117 ms
Server probes · 24h
Subscribers
4,297
active
Total calls
56
last 7 days
status Full status page → · 24 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 1,080 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 1,080 calls/month
  • 2 req/sec
  • Encode + decode + path stats
  • No credit card
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Starter

€2.70 /month

  • 9,300 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 9.3k calls/month
  • 8 req/sec
  • Precision 5 + 6
  • Email support
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Pro

€22.20 /month

  • 141,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 141k calls/month
  • 20 req/sec
  • Route-rendering pipelines
  • Priority support
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Mega

€58.20 /month

  • 725,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 725k calls/month
  • 50 req/sec
  • Platform scale
  • Dedicated SLA
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Related APIs

Other APIs with overlapping tags.

GeoJSON API

Measure GeoJSON geometry on the surface of the earth. Compute the true area of a Polygon or MultiPolygon (in square metres, square kilometres, hectares, acres and square miles), find the centroid of any GeoJSON, get the bounding box (west/south/east/north) and its centre, measure the length of a LineString or MultiLineString (in kilometres, metres, miles and nautical miles), and test whether a latitude/longitude point falls inside a polygon. Accepts geometries, Features and FeatureCollections; coordinates follow the GeoJSON [longitude, latitude] order. Perfect for mapping apps, geofencing, territory and catchment analysis, route distances and spatial dashboards. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 6 endpoints. Distinct from abstract shape geometry, coordinate-format conversion, slippy map tiles and administrative-boundary data.

api.oanor.com/geojson-api

Map Tile API

The maths behind every web map. Convert between latitude/longitude, slippy-map XYZ tile coordinates (the z/x/y scheme used by OpenStreetMap, Google Maps, Mapbox and Leaflet) and Bing/Azure quadkeys, and get the exact Web Mercator (EPSG:3857) bounding box and centre of any tile. Find which tile contains a point at a given zoom, expand a tile to its geographic bounds, translate a quadkey to z/x/y and back, and list a tile's eight neighbours (with correct antimeridian wrap-around and pole clamping). Perfect for tile servers and caches, pre-fetching map tiles, drawing tile grids and debugging map layers. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 5 endpoints. Distinct from coordinate-format conversion (Plus Code/MGRS/UTM), geohash and the encoded-polyline codec.

api.oanor.com/maptile-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

Routing API

Driving routes with distance, duration and geometry, distance/duration matrices for up to 25 points, and nearest-road snapping — on the global OpenStreetMap road network. Coordinates are simple lat,lon pairs.

api.oanor.com/routing-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Polyline API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Polyline API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Polyline 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 Polyline API cost?
Polyline API has a free tier with 100 calls / month. Paid plans start at €2.70 / 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 Polyline API GDPR-compliant?
All requests to Polyline 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/polyline-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/polyline-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/polyline-api/SOME_PATH");
curl_setopt($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/polyline-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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