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PayTo Counterparty Check – Base/EVM Address Risk Screen
x402
PayTo Counterparty Check – Base/EVM Address Risk Screen is a paid API for AI agents from klane402.deanhiki.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).
Returns contract-vs-wallet classification, nonce, ETH balance, USDC balance, and a risk note for a given Base/EVM address before sending funds.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pre-payment counterparty check for a Base (EVM) address: is it a contract or wallet, nonce (tx count), ETH and USDC balance, plus a simple risk note. Query: address. $0.01. Use before an agent sends funds.
Output
A JSON object containing: the account type ('eoa' for externally owned account or 'contract'), txCount (nonce / number of transactions sent), ETH balance, USDC balance on Base, and a free-text risk note summarizing any concerns.
Example use cases
Pre-payment counterparty vetting
“I'm about to send 500 USDC to 0x1234567890abcdef1234567890abcdef12345678 on Base — can you check if it's a legit wallet or a contract, see how many transactions it's done, and tell me if there's anything risky about it?”
DeFi protocol address sanity check
“Before my agent interacts with this address 0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef, can you confirm it's a smart contract and not an EOA, and what ETH balance it's holding?”
New payee onboarding risk screen
“We're adding a new vendor and they gave us 0xaAbBcCdDeEfF0011223344556677889900aAbBcC as their payment address — can you check its transaction history, USDC balance, and whether it looks risky before we whitelist it?”
Technical details
Endpoint
GEThttps://klane402.deanhiki.workers.dev/api/payto-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent or workflow needs a quick, cheap ($0.01) pre-flight check on an EVM/Base address before executing a payment or interaction — specifically when you need contract-vs-wallet classification, nonce, and token balances in a single call without setting up your own RPC infrastructure.
Side effects
- Invalid or malformed Ethereum address returns an error response
- Address not found on Base (zero activity) returns zeroed balances and a note indicating no history
- RPC node unavailability may cause timeouts or 5xx responses
- Missing 'address' query parameter results in a 400-style error
- Payment not made results in 402 response before data is returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"note": "...",
"type": "eoa",
"usdc": 5.2,
"txCount": 12
}
}Tags
x402
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