Service metadata

Code snippets

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

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

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

Example response

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

{
    "data": {
        "chains": [
            "ethereum",
            "polygon",
            "bsc",
            "arbitrum",
            "optimism",
            "base",
            "avalanche"
        ],
        "source": "Public chain RPC (publicnode) eth_getBalance/getTransactionCount/getCode (live)",
        "service": "walletbalance-api",
        "endpoints": {
            "GET /v1/meta": "This document.",
            "GET /v1/chains": "Supported chains and aliases.",
            "GET /v1/balance": "Native balance + nonce + is-contract on one chain (address=0x…, chain=ethereum).",
            "GET /v1/multichain": "Native balance across all supported chains (address=0x…)."
        },
        "description": "Live EVM wallet native-coin balance from each chain's public RPC: for any 0x address, the native balance (coin units and wei), the transaction count (nonce) and whether it is a smart contract. Check one chain, or fan out across all supported chains (Ethereum, Polygon, BSC, Arbitrum, Optimism, Base, Avalanche) to see where a wallet holds funds. Live, no key. Distinct from gas-fee and price APIs — this is on-chain address balances.",
        "upstream_status": "ok"
    },
    "meta": {
        "timestamp": "2026-06-09T03:02:02.375Z",
        "request_id": "cf405689-f772-47aa-8c07-3ff2d642201b"
    },
    "status": "ok",
    "message": "Meta",
    "success": true
}