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GET /v1/cooper

Cooper 12-minute test

Try it live

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

Custom headers (optional)
api.oanor.com/vo2max-api

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

Get an API key

Code snippets

curl "https://api.oanor.com/vo2max-api/v1/cooper" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/vo2max-api/v1/cooper", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/vo2max-api/v1/cooper");
curl_setopt($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/vo2max-api/v1/cooper",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

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

{
    "data": {
        "note": "Cooper 12-minute test: VO2max = (distance − 504.9)/44.73, distance in metres run in 12 minutes.",
        "inputs": {
            "distance_m": 2400
        },
        "rating": "good",
        "vo2max_ml_kg_min": 42.3675
    },
    "meta": {
        "timestamp": "2026-06-04T18:38:21.150Z",
        "request_id": "f48bae17-d128-440a-a5f9-29dfae672594"
    },
    "status": "ok",
    "message": "Cooper test",
    "success": true
}