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Polygon PoS Address Inspector
x402
Polygon PoS Address Inspector is a paid API for AI agents from onchaincheck.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-29).
Identifies what lives at a Polygon PoS address: EOA vs contract, token standard (ERC-20/721/1155), name, symbol, proxy details, bytecode size, nonce, and POL balance.
Price / call$0.005
Success—
StatusUnknown
How this service works
Identify what lives at a Polygon PoS address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and POL balance.
Output
A JSON object containing: the address kind (e.g. 'ERC-20 token', 'EOA', 'smart wallet'), chain identifier ('polygon'), token name and symbol, decimals, total supply, proxy details (upgradeable flag, implementation address, admin address), boolean flags for each ERC standard (ERC-20, ERC-165, ERC-721, ERC-1155), isContract flag, bytecode size in bytes, and native POL balance.
Example use cases
Token due diligence before trading
“Before I buy this token, can you look up 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 on Polygon PoS and tell me if it's a real ERC-20, what its name and symbol are, the total supply, and whether it's behind an upgradeable proxy I should be worried about?”
Smart contract proxy audit
“I need to audit this Polygon contract at 0x9238E612387eBBA4D4Fa0d76DbFbA99b453417b3 — is it an upgradeable proxy, and if so who's the admin and what's the current implementation address?”
Wallet vs contract classification
“Can you check whether 0xAbCd1234abcd1234abcd1234abcd1234abcd1234 on Polygon PoS is a regular EOA wallet or a deployed smart contract, and if it's a contract tell me the bytecode size and its POL balance?”
Technical details
Endpoint
GEThttps://onchaincheck.dev/polygon/contract?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a comprehensive onchain profile of any Polygon PoS address in a single call — covering wallet vs contract classification, token standard detection, proxy architecture, and native balance. Prefer it over block explorer manual lookups or raw RPC calls when you need structured, agent-readable output. Choose this over Ethereum or Base equivalents when the target address is on Polygon PoS specifically.
Side effects
- Invalid address format (not a 0x 40-hex-char address) returns a validation error
- Address not found or zero-address may return minimal or empty data
- RPC timeout or Polygon node unavailability may cause 5xx errors
- Non-standard or exotic proxy patterns may not be detected as upgradeable
- EIP-7702 delegation may not be detected on older contract deployments
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"kind": "ERC-20 token",
"name": "USD Coin",
"chain": "polygon",
"proxy": {
"admin": "0x9238E612387eBBA4D4Fa0d76DbFbA99b453417b3",
"upgradeable": true,
"implementation": "0x235AE97b28466Db30469b89A9fe4cFf0659f82Cb"
},
"symbol": "USDC",
"address": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"decimals": 6,
"standards": {
"erc20": true,
"erc165": false,
"erc721": false,
"erc1155": false
},
"isContract": true,
"totalSupply": "586295089.86576",
"bytecodeBytes": 1852,
"nativeBalance": "0"
}
}Tags
x402
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