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GET /v1/analyze

Shannon entropy

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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/entropy-api

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Code snippets

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

Example response

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

{
    "data": {
        "unit": "char",
        "length": 11,
        "normalized": 0.98666,
        "total_bits": 36.053748,
        "total_bytes": 4.506718,
        "unique_symbols": 10,
        "max_entropy_bits": 3.321928,
        "entropy_bits_per_symbol": 3.277613
    },
    "meta": {
        "timestamp": "2026-06-03T17:42:21.424Z",
        "request_id": "215cabc7-0f0e-4048-99fe-2b6b5235de7d"
    },
    "status": "ok",
    "message": "Shannon entropy",
    "success": true
}