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GET /v1/area

Area of a GeoJSON polygon

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10 free calls per day — no sign-up, no API key. Goes through the oanor gateway.

Custom headers (optional)
api.oanor.com/geojson-api

It works. Grab an API key and use it in your project.

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Code snippets

curl "https://api.oanor.com/geojson-api/v1/area" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/geojson-api/v1/area", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/geojson-api/v1/area");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);
import requests
requests.get(
    "https://api.oanor.com/geojson-api/v1/area",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "acres": 3061976.872801,
        "hectares": 1239139.990207,
        "square_miles": 4784.34625,
        "square_meters": 12391399902.0711,
        "square_kilometers": 12391.399902
    },
    "meta": {
        "timestamp": "2026-06-02T16:51:47.726Z",
        "request_id": "00783958-665e-4d5d-9121-1ee6d1e7bc55"
    },
    "status": "ok",
    "message": "Area of a GeoJSON polygon",
    "success": true
}