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GET /v1/chains

Supported chains

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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/tokeninfo-api

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Code snippets

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

Example response

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

{
    "data": {
        "count": 7,
        "chains": [
            {
                "key": "ethereum",
                "name": "Ethereum"
            },
            {
                "key": "polygon",
                "name": "Polygon"
            },
            {
                "key": "bsc",
                "name": "BNB Smart Chain"
            },
            {
                "key": "arbitrum",
                "name": "Arbitrum One"
            },
            {
                "key": "optimism",
                "name": "Optimism"
            },
            {
                "key": "base",
                "name": "Base"
            },
            {
                "key": "avalanche",
                "name": "Avalanche C-Chain"
            }
        ],
        "aliases": {
            "op": "optimism",
            "arb": "arbitrum",
            "bnb": "bsc",
            "eth": "ethereum",
            "pol": "polygon",
            "avax": "avalanche",
            "matic": "polygon",
            "binance": "bsc"
        }
    },
    "meta": {
        "timestamp": "2026-06-09T03:01:59.600Z",
        "request_id": "8f0d2f48-e14e-447f-8d60-9d411750e885"
    },
    "status": "ok",
    "message": "Chains retrieved successfully",
    "success": true
}