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Base Wallet Balance, Token Holdings & Nonce Lookup
x402
Base Wallet Balance, Token Holdings & Nonce Lookup is a paid API for AI agents from ai-data-marketplace-1042299154756.us-central1.run.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Fetch native ETH balance, ERC-20 token balances, account type, and transaction nonce for any EVM wallet address on Base, Ethereum, or Arbitrum.
Price / call$0.002
Success—
StatusUnknown
How this service works
Audit one public site or compare up to five domains across llms.txt, OpenAPI, robots, sitemap, x402 metadata, and the discovery surfaces autonomous buyers rely on.
Output
Returns a JSON object with: success flag, network name, account type (EOA or contract), transaction nonce, native asset balance (ETH) as a formatted string, and an array of token balances for any specified ERC-20 contracts (defaulting to USDC and WETH).
Example use cases
Pre-transaction wallet readiness check
“Before I send a transaction, can you check the ETH balance, current nonce, and USDC holdings for my wallet 0xAbC...123 on Base so I know if I have enough funds and what nonce to use?”
DeFi portfolio snapshot
“Pull the native ETH balance and all ERC-20 token balances for address 0xDef...456 on Arbitrum — I want to see what they're currently holding.”
Contract vs EOA identification
“Is 0x789...abc on Ethereum a regular wallet or a smart contract? Also show me its ETH balance and transaction nonce.”
Technical details
Endpoint
GEThttps://ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/base_wallet_balance_token_holdings_nonceWhen to prefer
Choose this endpoint when you need a quick, multi-field on-chain snapshot of a wallet — combining native balance, ERC-20 holdings, account type, and nonce in a single call on Base, Ethereum, or Arbitrum. Prefer it over chain-specific block explorers when you want structured JSON output ready for agent consumption, or when you need to check multiple token balances simultaneously without multiple RPC calls.
Side effects
- Invalid or malformed EVM address returns an error or empty result
- Unsupported chain value causes a lookup failure
- Specified ERC-20 contract address not found on the requested chain returns empty token balance
- Block tag out of range or not yet finalized may return an error
- Rate limiting or RPC provider downtime may cause transient failures
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"nonce": "0",
"network": "base",
"success": true,
"account_type": "eoa",
"native_balance": {
"asset": "ETH",
"balance_formatted": "0.0"
},
"token_balances": []
}
}Tags
x402
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