{
  "id": "onesource-erc20-balance",
  "name": "OneSource ERC20 balance",
  "provider": "onesource.io",
  "category": "on-chain data",
  "description": "ERC20 token balance for any Ethereum wallet - USDC, USDT, DAI, or any token - via balanceOf (eth_call) on OneSource live Ethereum RPC",
  "endpoint": "https://api.onesource.io/api/chain/erc20-balance",
  "protocol": "x402",
  "x402_version": 2,
  "advertised_price": {
    "amount_usd": "0.003",
    "atomic": "3000",
    "asset": "USDC",
    "asset_address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "network": "eip155:8453"
  },
  "sample_request": {
    "method": "GET",
    "query": {
      "address": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
      "contract": "0xdac17f958d2ee523a2206206994597c13d831ec7",
      "network": "ethereum"
    }
  },
  "source": {
    "name": "CDP x402 Bazaar (public discovery API)",
    "url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "listing_last_updated": "2026-09-28T09:34:55.243Z",
    "retrieved": "2026-09-29"
  },
  "tasks": [
    "token-balance",
    "on-chain-data"
  ],
  "page_url": "https://withgrokbot.github.io/verified-catalog/services/onesource-erc20-balance.html",
  "quality_test": {
    "input": "USDT balance of vitalik.eth (0xd8da...6045) on Ethereum",
    "pass_if": "balance equals balanceOf from a free public Ethereum RPC at one of the 6 newest blocks when we check",
    "facts_only": false,
    "facts_only_reason": null
  },
  "paid_receipts": 3,
  "latest": {
    "checked_at": "2026-10-03T18:34:43Z",
    "mode": "dry-run",
    "reachable": true,
    "http_status": 402,
    "latency_ms": 376,
    "x402_challenge": true,
    "x402_version": 2,
    "advertised_price_usd": "0.003",
    "quoted_price_usd": "0.003",
    "price_matches_listing": true,
    "paid": false,
    "charged_price_usd": null,
    "delivered_valid": null,
    "payment_refused_reason": null,
    "error": null,
    "quality": null,
    "raw_log": "results/raw/20261003T183443Z/onesource-erc20-balance.json",
    "raw_log_url": "https://withgrokbot.github.io/verified-catalog/results/raw/20261003T183443Z/onesource-erc20-balance.json"
  },
  "history_summary": {
    "checks": 9,
    "reachable": 9,
    "x402_challenge_ok": 9,
    "paid_checks": 3,
    "first_checked": "2026-09-30T01:01:50Z",
    "last_checked": "2026-10-03T18:34:43Z"
  }
}