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EVM Contract Introspection
x402
EVM Contract Introspection is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).
Inspects an EVM contract address to determine if it is a contract, whether it is a proxy, and whether it is a token, returning full metadata.
Price / call$0.005
Success—
StatusUnknown
How this service works
EVM contract introspection — is it a contract, is it a proxy, is it a token — Genesis402 / UnyKorn Operator Network
Output
Returns a JSON object indicating whether the address is a contract, whether a proxy pattern was detected (including the proxy standard like ZeppelinOS and the implementation address), and if the contract is a token, its name, symbol, decimals, ERC20 compatibility flag, and total supply. Also returns the chain ID, bytecode size, an evidence hash, and a payment receipt.
Example use cases
Verify token contract before DeFi interaction
“Before I approve this transaction, can you check whether 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 on Polygon is actually a real ERC20 token contract and tell me its name, symbol, and decimals?”
Identify proxy implementation address
“I have this contract address on Base — 0x2ce6311ddAE708829bc0784C967b7d77D19BF779 — can you tell me if it's a proxy and what the underlying implementation contract address is?”
Audit unknown contract address
“Someone sent me this address on Arbitrum: 0x912CE59144191C1204E64559FE8253a0e49E6548 — can you tell me if it's a smart contract or just a wallet, and if it's a contract, whether it's a token and what kind?”
Technical details
Endpoint
POSThttps://twin.unykorn.org/evm-contract?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to quickly classify an unknown EVM address across major chains (Ethereum, Base, Polygon, Arbitrum, Optimism) — especially when you need all three signals (is it a contract, is it a proxy, is it a token) in a single call. Prefer this over manual RPC calls or block explorer scraping when operating in an agentic context where structured, machine-readable output and pay-per-call pricing are preferred. It is especially useful for DeFi due diligence, contract auditing pipelines, or token discovery workflows.
Side effects
- Address is not a contract (EOA) — is_contract returns false with no token or proxy data
- Invalid address format — input validation error if not a valid 0x hex address
- Unsupported chain — error if chain is not in the allowed enum
- Contract exists but is not a token — token field absent or null
- Proxy detection inconclusive — proxy.detected false even if pattern exists but is non-standard
- Network timeout or RPC failure — call may return an error or timeout
- Insufficient payment — x402 payment not accepted, returns 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "evm-contract",
"chain": "base",
"proxy": {
"detected": true,
"standard": "zeppelinos",
"implementation": "0x2ce6…d779"
},
"token": {
"name": "USD Coin",
"symbol": "USDC",
"decimals": 6,
"erc20_like": true,
"total_supply": "4285515964.300967"
},
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.25,
"receipt_id": "g402-<16hex>"
},
"chain_id": 8453,
"is_contract": true,
"evidence_hash": "sha256:<64hex>",
"bytecode_bytes": 1852
}
}Tags
x402
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