# Contract Owner Lookup

> 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.

## Facts

- Endpoint: GET https://402.com.tr/api/x402/contract-owner?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/contract-owner-lookup-a513020e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8hFTMnfY0eexTxA0tX9SP

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability contract-owner-lookup-a513020e
```

Example prompt: Who actually controls the contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 — is the owner a single wallet or a multisig, is it upgradeable, and who controls the proxy admin?

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "Contract address"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/contract-owner-lookup-a513020e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 402.com.tr](https://www.zero.xyz/host/402.com.tr/llms.txt)