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chain-contract-code
x402
chain-contract-code is a paid API for AI agents from chain.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).
Checks if an Ethereum-compatible address is a smart contract, returning bytecode size, EIP-1967 proxy implementation address, and EIP-7702 delegation info across multiple chains.
Price / call$0.01
Success—
StatusUnknown
How this service works
Is this address a contract? Bytecode size, EIP-1967 proxy implementation and EIP-7702 delegation. Default chain Base; prefix another: ethereum:, arbitrum:, optimism:, polygon:, bsc:. $0.01 per call.
Output
Returns whether the address has deployed bytecode (is a contract), the size of that bytecode, the EIP-1967 proxy implementation address if applicable, and EIP-7702 delegation target if present — all for the specified chain (defaults to Base).
Example use cases
Proxy implementation resolution for DeFi protocol
“Can you check if 0x7Fc66500c84A76Ad7e9c93437bFc5Ac33E2DDaE9 on Ethereum is a proxy contract and tell me what implementation address it points to?”
EOA vs contract detection before funds transfer
“Before I send funds to 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD on Base, can you confirm whether it's a plain wallet or a smart contract?”
EIP-7702 delegation check on Arbitrum
“Check the address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Arbitrum — is it an EOA, a contract, or does it have an EIP-7702 delegation set up?”
Technical details
Endpoint
GEThttps://chain.intel.rallylive.ca/chain/code?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to determine whether an address is a smart contract vs an EOA, or when you need to resolve proxy contract implementation addresses (EIP-1967) or EIP-7702 delegation targets across EVM chains including Base, Ethereum, Arbitrum, Optimism, Polygon, and BSC. Prefer this over general blockchain explorers when you need programmatic, structured data for agent workflows at low cost ($0.01/call).
Side effects
- Invalid or malformed address returns an error
- Unsupported chain prefix returns an error
- Address not found on the specified chain returns empty/null bytecode size
- Network timeout or RPC unavailability causes failure
- Missing required input parameter returns a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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