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Contract Owner Lookup
x402
Contract Owner Lookup is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-12).
Reads a smart contract's ownership structure from chain, including owner/admin addresses, proxy implementation, upgrade admin, paused state, and whether the owner is an EOA or multisig/timelock.
Price / call$0.03
Success—
StatusUnknown
How this service works
Reads who controls a contract straight from chain: owner/getOwner/admin, pending owner, EIP-1967 proxy implementation + admin, and paused state — and whether the owner is a single EOA key (one compromise = total control) or a contract (multisig/timelock). Crucially: ownership 'renounced' is NOT safe if it is still an upgradeable proxy whose admin can swap the logic. The control-surface read before you trust a contract. Not financial advice.
Output
Returns the owner address, pending owner (if any), proxy implementation and admin addresses (EIP-1967), paused state, and a classification of whether the owner is an EOA (single key, high risk) or a contract (multisig/timelock). Includes flags for upgrade risk and whether a renounced-ownership claim is actually safe given proxy upgradeability.
Example use cases
Pre-investment contract safety check
“Before I ape into this protocol, check who owns the contract at 0x6B175474E89094C44Da98b954EedeAC495271d0F — is it a single EOA that could rug, or a multisig/timelock? And is it an upgradeable proxy?”
DeFi protocol governance audit
“I need to audit the ownership of 0xc3d688B66703497DAA19211EEdff47f25384cdc3 — tell me who the owner is, who the proxy admin is, whether there's a pending owner transfer, and if the contract is currently paused.”
Renounced ownership risk verification
“The team says they renounced ownership on contract 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984, but is it actually safe? Check if it's still an upgradeable proxy with an admin that could swap the logic.”
Technical details
Endpoint
GEThttps://402.com.tr/api/x402/contract-owner?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to quickly assess the real control surface of a smart contract before trusting it with funds or governance decisions. It is purpose-built for the specific combination of owner detection, proxy admin resolution, EOA-vs-contract classification, and paused-state checking that a manual review would require multiple separate calls to achieve. Prefer this over generic blockchain explorers when you need a structured, machine-readable risk summary rather than raw on-chain data.
Side effects
- Invalid or non-checksummed contract address returns an error
- Address is an EOA (not a contract) — no ownership data available
- Contract does not implement any standard ownership interface — partial or empty results
- RPC/node timeout for high-traffic chains — retry recommended
- Contract uses a non-standard or obfuscated ownership pattern that isn't detected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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