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GET /v1/from-entropy

Entropy to mnemonic

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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/bip39-api

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Code snippets

curl "https://api.oanor.com/bip39-api/v1/from-entropy" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/bip39-api/v1/from-entropy", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/bip39-api/v1/from-entropy");
curl_setopt($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/bip39-api/v1/from-entropy",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

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

{
    "data": {
        "entropy": "00000000000000000000000000000000",
        "language": "english",
        "mnemonic": "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about"
    },
    "meta": {
        "timestamp": "2026-06-02T16:51:52.955Z",
        "request_id": "a033fb51-4501-4a5c-aaec-e961fba44fb9"
    },
    "status": "ok",
    "message": "Entropy to mnemonic",
    "success": true
}