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EVM Contract ABI Lookup
x402
EVM Contract ABI Lookup is a paid API for AI agents from 138-197-15-135.sslip.io, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-31).
Fetches the verified ABI, function list, event list, compiler version, and proxy implementation details for a smart contract address on Base, Ethereum, Arbitrum, or Optimism.
Price / call$0.004
Success—
StatusUnknown
How this service works
Whether a contract on Base, Ethereum, Arbitrum or Optimism is source-verified (Sourcify), its name, compiler, full ABI, function and event signatures, and its EIP-1967 proxy implementation (also looked up). Deterministic, no LLM.
Output
Returns a JSON object containing the full ABI array, human-readable function and event signature lists, contract name, compiler version, verification status, whether the address is a contract, the chain it was looked up on, match type (exact or similar), and the proxy implementation address if applicable. Null fields indicate unavailable data.
Example use cases
Inspect DeFi protocol contract interface
“I need to interact with the Aave lending pool at 0x87870Bca3F3fD6335C3F4ce8392D69350B4fA4E2 on Ethereum — can you fetch its ABI and show me all the available functions?”
Verify proxy contract implementation
“This contract on Base looks like a proxy — can you look up 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 and tell me the ABI, whether it's verified, and what the underlying implementation address is?”
Audit unknown contract before interacting
“Before my agent calls this Arbitrum contract at 0xFF970A61A04b1cA14834A43f5dE4533eBDDB5CC6, can you fetch its ABI and event list so I know exactly what it does?”
Technical details
Endpoint
GEThttps://138-197-15-135.sslip.io/v1/contract/abi?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically inspect or call a deployed EVM smart contract and require its ABI, function signatures, or event list — especially across Base, Ethereum, Arbitrum, or Optimism. Prefer this over block explorers when you need structured JSON output suitable for agent-driven contract interactions, or when you need proxy resolution built in. Costs $0.004 USDC per call via x402 micropayment.
Side effects
- Unverified contract returns verified=false with null ABI
- Non-contract address (EOA) returns isContract=false
- Invalid address format may return an error or empty result
- Unsupported chain name returns an error
- Rate limiting or payment failure via x402 returns HTTP 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"abi": [],
"name": "FiatTokenProxy",
"chain": "base",
"match": "exact_match",
"events": [
"Upgraded(address)"
],
"address": "0x…",
"compiler": "0.6.12",
"verified": true,
"functions": [
"admin()"
],
"isContract": true,
"proxyImplementation": "0x…"
}
}Tags
x402
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