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Contract ABI Lookup (Sourcify-verified, Multi-chain)
x402
Contract ABI Lookup (Sourcify-verified, Multi-chain) is a paid API for AI agents from agent-data-tools.revmesh2074.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-26).
Returns the verified ABI, function/event signatures, compiler info, and optionally source code for a smart contract on Ethereum, Base, Arbitrum, Optimism, or Polygon.
Price / call$0.01
Success—
StatusUnknown
How this service works
Contract ABI, verified contract. The verified ABI of a smart contract on Ethereum, Base, Arbitrum, Optimism or Polygon from Sourcify's open verification repository: contract name, compiler, match quality, every function and event signature, the full ABI, and for proxies the implementation contract with its ABI. Optional source=true adds the main source file (up to 20,000 characters). Unverified contracts are an uncharged 404. Use before calling or decoding a contract.
Output
Returns a JSON object with: contract name, chain, compiler version, match quality (full/partial), an array of function objects with signatures and state mutability, an array of event signatures, the full raw ABI array, and optionally the main Solidity source file (up to 20,000 characters). For proxy contracts, also returns a proxy object with type, implementation address, implementation name, and the implementation's ABI. Unverified contracts return a 404 (not charged).
Example use cases
Decode DeFi contract before interaction
“I'm about to interact with the Uniswap v3 pool contract at 0x8ad599c3A0ff1De082011EFDDc58f1908eb6e6D8 on Ethereum — can you pull its verified ABI and list all the functions so I know what I can call?”
Inspect proxy implementation contract
“The contract at 0x4Fabb145d64652a948d72533023f6E7A623C7C53 on Ethereum looks like a proxy — can you fetch its ABI and tell me what the implementation contract is and what functions it exposes?”
Retrieve contract source and ABI on Base
“Can you get the verified ABI and main source file for the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base so I can review what it does before integrating it?”
Technical details
Endpoint
GEThttps://agent-data-tools.revmesh2074.workers.dev/contract/abi?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to inspect, call, or decode a smart contract and need its verified ABI from Sourcify — particularly when you need function/event signatures before making an eth_call, when you want to confirm a proxy's implementation, or when you need the actual Solidity source. Prefer this over on-chain approaches when you want human-readable function names and structured ABI without manual decoding. Best choice when working across Ethereum, Base, Arbitrum, Optimism, or Polygon with a single unified API.
Side effects
- Contract not verified on Sourcify → 404 (not charged)
- Invalid or malformed contract address → error response
- Unsupported chain name → error response
- Contract address is an EOA (not a contract) → 404
- Source file exceeds 20,000 characters → truncated or omitted
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"abi": [],
"name": "FiatTokenProxy",
"chain": "Ethereum",
"match": "exact_match",
"proxy": {
"type": "ZeppelinOSProxy",
"implementation": "0x2Ce6311ddAE708829bc0784C967b7d77D19FD779",
"implementationName": "FiatTokenV2_2"
},
"errors": [],
"events": [
"Transfer(address,address,uint256)"
],
"source": "Sourcify (sourcify.dev)",
"address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
"compiler": "0.6.12+commit.27d51765",
"functions": [
{
"signature": "transfer(address,uint256)",
"stateMutability": "nonpayable"
}
]
}
}Tags
x402
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