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GET /v1/doubling-time

Case doubling time

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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/epidemic-api

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Code snippets

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

Example response

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

{
    "data": {
        "note": "Doubling time = ln2 / growth rate. From R0 and the serial interval, growth rate ≈ ln(R0)/serial interval.",
        "inputs": {
            "growth_rate": 0.13862944
        },
        "doubling_time_days": 5
    },
    "meta": {
        "timestamp": "2026-06-05T19:50:17.888Z",
        "request_id": "923ed2c7-476d-46f8-866a-a29660f8c0d4"
    },
    "status": "ok",
    "message": "Doubling time",
    "success": true
}