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Smart Contract Source Code Lookup
x402
Smart Contract Source Code Lookup is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.026/call, status unknown (last checked 2026-10-31).
Fetches the verified source code and metadata for a smart contract at a given address on an EVM network
Price / call$0.026
Success—
StatusUnknown
How this service works
X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.
Output
Returns a JSON object containing the verified source code, contract name, compiler version, ABI, and other metadata for the specified smart contract address on the requested EVM network. Success flag indicates whether the contract was found and is verified.
Example use cases
Audit a DeFi protocol contract
“Fetch the source code for the contract at 0x7Fc66500c84A76Ad7e9c93437bFc5Ac33E2DDaE9 on Ethereum so I can review its logic before interacting with it.”
Verify token contract on Base
“Look up the verified source code for the contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base — I want to see what functions it exposes.”
Inspect NFT contract on Polygon
“Can you retrieve the smart contract source code for 0x2953399124F0cBB46d2CbACD8A89cF0599974963 on Polygon so I can check its mint and transfer logic?”
Technical details
Endpoint
GEThttps://x402helper.xyz/89e509/contract/source?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically retrieve verified smart contract source code and metadata for a given address on a supported EVM network (Base, Ethereum, Arbitrum, Optimism, Polygon, BNB). Prefer this when you need quick on-demand contract inspection without setting up a full blockchain node or managing API keys for Etherscan/Sourcify directly.
Side effects
- Contract address not verified on the specified network — returns empty or error result
- Invalid contract address format (must be 0x + 40 hex characters)
- Unsupported network specified
- Contract exists but source code not publicly verified
- Payment failure via x402 micropayment protocol
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {},
"success": true
}
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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