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Riley Craig x402 Agent Store — On-Chain Balance Lookup
x402
Riley Craig x402 Agent Store — On-Chain Balance Lookup is a paid API for AI agents from x402-agent-store.rileycraig14.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Returns the native token balance, transaction count, and USD value for a given wallet address on a specified EVM chain, paid per-call via x402/USDC.
Price / call$0.003
Success—
StatusUnknown
How this service works
The cheapest on-chain RPC read: any address's native coin balance (ETH/POL/xDAI) with live USD value and outgoing transaction count (nonce), across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The high-frequency balance check wallet-tracking, settlement, and trading agents poll constantly. Free upstream (Blockscout); undercuts onesource.
Output
A JSON object containing the chain name, native token symbol, wallet address, native token balance as a decimal number, total transaction count, and current USD value of the balance. Example: {chain:'base', symbol:'ETH', address:'0x...', balance:61.6, tx_count:1842, usd_value:99826.71}.
Example use cases
Example prompt
“What's the current ETH balance and USD value of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base — and how many transactions have they made?”
Technical details
Endpoint
GEThttps://x402-agent-store.rileycraig14.workers.dev/chain/balanceWhen to prefer
Use this endpoint when an AI agent needs to read the native token balance (ETH, MATIC, etc.) of any EVM-compatible wallet address without setting up API keys or subscriptions — ideal for on-demand, pay-per-call blockchain reads in agentic workflows using x402 micropayments on Base.
Side effects
- Invalid or malformed wallet address returns an error response
- Unsupported chain name returns an error or default to base
- Payment failure via x402 protocol results in 402 status with no data returned
- Network or RPC issues for the requested chain may cause a timeout or 503
- Address with no activity returns zero balance and zero tx_count
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"symbol": "ETH",
"address": "0x...",
"balance": 61.6,
"tx_count": 1842,
"usd_value": 99826.71
}
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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