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Contract Source & ABI
x402
Contract Source & ABI is a paid API for AI agents from www.x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Returns verified Solidity source code, parsed ABI, compiler metadata, and proxy implementation address for an Ethereum contract from Etherscan V2
Price / call$0.01
Success—
StatusUnknown
How this service works
Verified contract source code, parsed ABI, and compiler metadata for a contract address on Ethereum, from Etherscan's V2 API -- including proxy detection with the implementation contract address, so you're not left guessing why a proxy's own source looks empty. An unverified contract returns verified=false with null source/ABI rather than an error. $0.01/call.
Output
Returns a JSON object with: verified (boolean), source code (full Solidity text or null if unverified), parsed ABI array (or null), compiler version and settings metadata, whether the contract is a proxy, and the proxy's implementation contract address if applicable. Unverified contracts return verified=false with null source and ABI rather than an error.
Example use cases
Decode DeFi protocol contract interface
“Fetch the ABI and verified source for the Uniswap V3 router at 0xE592427A0AEce92De3Edee1F18E0157C05861564 on Ethereum so I can see what functions are available to call.”
Proxy implementation discovery
“I'm looking at 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f on Ethereum — can you check if it's a proxy contract and give me the actual implementation address along with its ABI?”
Audit unverified contract check
“Can you check whether the contract at 0xdAC17F958D2ee523a2206206994597C13D831ec7 on Ethereum has verified source code on Etherscan, and if so return the compiler version and full source?”
Technical details
Endpoint
GEThttps://www.x402financialdata.com/contract-source/:addressWhen to prefer
Choose this endpoint when you need verified Solidity source, a parsed ABI, or compiler metadata for a specific Ethereum contract address — especially when you need automatic proxy detection to find the real implementation behind upgradeable contracts. Prefer it over raw Etherscan API calls when you need a clean, pre-parsed single response with proxy resolution included and are operating in an x402 payment context.
Side effects
- Invalid or malformed contract address returns an error
- Contract address that is an EOA (externally owned account) rather than a contract may return empty or error
- Rate limiting or upstream Etherscan API downtime may cause failures
- Only Ethereum mainnet ('eth') is supported; other chains will return an error
- Payment failure or insufficient USDC balance returns a 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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