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AllTheBot Contract Check (ETH)
x402
AllTheBot Contract Check (ETH) is a paid API for AI agents from api.zkrobotics.fr, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-12).
Checks whether an Ethereum address is a smart contract, EOA wallet, or EIP-7702 delegated wallet, returning bytecode size, ETH balance, and ERC-20 token symbol.
Price / call$0.003
Success—
StatusUnknown
How this service works
Pay-per-call APIs for AI agents over x402: token safety reports, Base and Ethereum on-chain reads, crypto prices, domain checks (DNS, WHOIS, SSL, email), finance data (FX, SEC), worldwide weather forecasts, France alerts, text AI, fun content. USDC on Base, no account, no API key.
Output
Returns a JSON object with the address type ('contract', 'eoa', or 'eip7702'), bytecode size in bytes, ETH balance as a string, network name ('ethereum'), and if applicable an ERC-20 object with symbol and decimals.
Example use cases
Pre-transfer safety check
“I'm about to send 500 USDC to 0xdAC17F958D2ee523a2206206994597C13D831ec7 on Ethereum — can you first check if it's a real wallet or a smart contract so I don't lose my funds?”
DeFi contract verification
“Can you confirm whether 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D is a smart contract on Ethereum and tell me its bytecode size and ERC-20 symbol if it's a token contract?”
EIP-7702 delegation detection
“Is the Ethereum address 0xAbCd1234567890abcd1234567890abcdef123456 a standard wallet, an EIP-7702 delegated wallet, or a smart contract? I need to know before I integrate it into my app.”
Technical details
Endpoint
GEThttps://api.zkrobotics.fr/x402/eth/contract?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to classify an Ethereum mainnet address before sending funds or interacting with it programmatically — especially when you want to distinguish between EOAs, EIP-7702 delegated wallets, and smart contracts, or when you need ERC-20 metadata for a token contract address. Use the sibling Base endpoint for Base network addresses.
Side effects
- Invalid address format (not matching 0x + 40 hex chars) returns a validation error
- Address not found or network timeout returns an error
- Non-Ethereum addresses (e.g. Base, Polygon) not supported — use the Base variant instead
- Rate limit or payment failure returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"eth": "0",
"type": "contract",
"erc20": {
"symbol": "USDC",
"decimals": 6
},
"address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
"network": "ethereum",
"bytecode_size": 2186
}
}Tags
x402
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