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Arbitrum Contract Detection
x402
Arbitrum Contract Detection is a paid API for AI agents from agent-data-tools.revmesh2074.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-19).
Checks whether a given Ethereum address is a smart contract on Arbitrum One, returning contract metadata including code size, proxy type, and implementation address.
Price / call$0.003
Success—
StatusUnknown
How this service works
Check whether a 0x address on Arbitrum One is a smart contract or a plain wallet: bytecode size, and whether it is an EIP-1167 minimal proxy and which implementation it points to. Use before sending funds or approving a spender; for a fuller risk verdict use check_counterparty. A malformed address is rejected with 400, uncharged.
Output
Returns a JSON object with the chain name ('Arbitrum One'), chainId (42161), the queried address, a boolean isContract indicating whether the address has deployed bytecode, codeBytes with the size of the bytecode, a minimalProxy boolean indicating EIP-1167 proxy pattern, and an implementation field (address string or null) pointing to the underlying logic contract if it is a proxy.
Example use cases
Pre-transfer contract safety check
“Before I send funds to 0x1234abcd5678efab1234abcd5678efab1234abcd on Arbitrum, can you confirm whether it's an externally owned wallet or a smart contract?”
DeFi protocol proxy verification
“I want to know if 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 on Arbitrum One is a minimal proxy contract and what its implementation address is.”
Contract code size audit
“How many bytes of bytecode does the contract at 0xCd5fE23C85820F7B72D0926FC9b05b43E359b7ee on Arbitrum have? I need to know if it's a real deployed contract.”
Technical details
Endpoint
GEThttps://agent-data-tools.revmesh2074.workers.dev/arb/is-contract?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need to classify an address on Arbitrum One as a contract vs. EOA, or to detect proxy patterns (minimal proxy / EIP-1167) and resolve the underlying implementation. Choose this over generic Ethereum tools when the target chain is Arbitrum, and prefer it over block explorers when you need a machine-readable, pay-per-call result with no API key.
Side effects
- Invalid or malformed address format returns an error
- Address with no on-chain activity may return isContract: false even if recently deployed
- Network timeout or RPC unavailability for Arbitrum may cause failure
- Non-0x-prefixed address strings may be rejected by schema validation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "Arbitrum One",
"address": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"chainId": 42161,
"codeBytes": 1855,
"isContract": true,
"minimalProxy": false,
"implementation": null
}
}Tags
x402
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