Bitcoin-vs-Ethereum ETF volume and institutional lean

Code snippets

curl "https://api.oanor.com/cryptoetf-api/v1/summary" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/cryptoetf-api/v1/summary", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/cryptoetf-api/v1/summary");
curl_setopt($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/cryptoetf-api/v1/summary",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

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

{
    "data": {
        "note": "The institutional-appetite snapshot: total trading volume across all spot Bitcoin ETFs versus all spot Ethereum ETFs, the ratio between them (btc_to_eth_volume_ratio) and which way institutions are leaning today, with the volume leader on each side. A high ratio means the day's ETF flow of attention is concentrated in Bitcoin. Volume-based, not fund flows. Live, cached ~10m.",
        "source": "Yahoo Finance (per-ETF daily chart), keyless",
        "bitcoin_etf_count": 11,
        "ethereum_etf_count": 9,
        "institutional_lean": "balanced",
        "bitcoin_volume_leader": "IBIT",
        "ethereum_volume_leader": "ETHA",
        "btc_to_eth_volume_ratio": 1.25,
        "bitcoin_etf_total_volume": 41522506,
        "ethereum_etf_total_volume": 33090950
    },
    "meta": {
        "timestamp": "2026-06-12T19:35:43.250Z",
        "request_id": "70c4979a-5c10-4de6-aacd-5f78a9a26e1a"
    },
    "status": "ok",
    "message": "Summary retrieved successfully",
    "success": true
}