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dt0ur.online On-Chain Address Classifier
x402
dt0ur.online On-Chain Address Classifier is a paid API for AI agents from dt0ur.online, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-03).
Classifies an EVM address on multiple chains as EOA wallet or contract, and extracts proxy type, token standard, Safe multisig config, and ownership info.
Price / call$0.01
Success—
StatusUnknown
How this service works
Classify any address on base, ethereum, arbitrum, optimism, polygon, bsc: wallet (EOA, incl. EIP-7702 delegation) or contract, bytecode size, upgradeable proxy and implementation (EIP-1967, beacon, EIP-1167 clones), token standard (ERC-20/721/1155), Safe multisig threshold and owners, and Ownable owner.
Output
Returns a structured classification of the address: whether it is an EOA (including EIP-7702 delegated), a smart contract with bytecode size; proxy pattern detected (EIP-1967 transparent/UUPS, beacon, EIP-1167 minimal clone) and its implementation address; token standard (ERC-20, ERC-721, ERC-1155); Safe multisig threshold and list of owner addresses; and Ownable owner address if applicable.
Example use cases
Detect token contract type
“I need to know whether 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984 on Ethereum is an ERC-20, ERC-721, or ERC-1155 contract.”
Audit Safe multisig configuration
“Can you look up the Safe multisig at 0xBB9bc244D798123fDe783fCc1C72d3Bb8C189413 on Ethereum and tell me the owner addresses and the signing threshold?”
Identify proxy implementation on Base
“Is the contract at 0x4200000000000000000000000000000000000006 on Base an upgradeable proxy, and if so what is the current implementation address?”
Technical details
Endpoint
POSThttps://dt0ur.online/api/onchain/contract?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call on-chain classification of an EVM address across base, ethereum, arbitrum, optimism, polygon, or BSC — especially when you need to distinguish EOAs from contracts, detect proxy patterns and implementations, identify token standards, or audit Safe multisig ownership in one request rather than making multiple RPC calls yourself.
Side effects
- Invalid or malformed address format returns validation error
- Unsupported chain value returns enum validation error
- Address not found or zero-activity on the selected chain may return minimal or empty classification
- RPC timeout for the target chain may produce a 5xx error
- Non-standard or exotic proxy patterns not covered by EIP-1967/beacon/1167 may be undetected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | EVM chain: base, ethereum, arbitrum, optimism, polygon, bsc (default base) |
| address | string | Address to inspect (0x...) |
Tags
x402
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