Total USDC/USDT, ratio, Ethereum dominance vs rollup share

Code snippets

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

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

$ch = curl_init("https://api.oanor.com/stablecoinchains-api/v1/summary");
curl_setopt($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/stablecoinchains-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 top-down stablecoin map across the tracked chains: total native USDC and USDT, the combined total, the USDT-to-USDC ratio (USDT leads overall), and how the dollars split between Ethereum mainnet (ethereum_dominance_pct) and the rollups (rollup_share_pct). A read on Ethereum's grip on stablecoin liquidity versus the L2 migration. Live, cached ~5m.",
        "source": "public JSON-RPC per chain, keyless",
        "total_usdc_usd": 60249709769,
        "total_usdt_usd": 101000621065,
        "rollup_share_pct": 5.53,
        "combined_total_usd": 161250330834,
        "usdt_to_usdc_ratio": 1.68,
        "ethereum_dominance_pct": 92.07
    },
    "meta": {
        "timestamp": "2026-06-12T19:35:40.285Z",
        "request_id": "2f4297c1-3f4c-4f74-a8a8-bee90e52d61e"
    },
    "status": "ok",
    "message": "Summary retrieved successfully",
    "success": true
}