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Contract ABI Lookup via x402helper
x402
Contract ABI Lookup via x402helper is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-31).
Returns the ABI (Application Binary Interface) for a smart contract on an EVM-compatible network, given a contract address.
Price / call$0.009
Success—
StatusUnknown
How this service works
X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.
Output
A JSON object with a 'success' boolean and a 'result' object containing the contract ABI — an array of function signatures, event definitions, and constructor details for the requested smart contract on the specified EVM network.
Example use cases
DeFi contract interface discovery
“I need the ABI for the contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum so I can see what functions it exposes.”
Multi-chain contract inspection
“Can you pull the ABI for contract 0x4200000000000000000000000000000000000006 on Optimism? I want to know what events and methods it has.”
Arbitrum contract integration prep
“Fetch the ABI for 0x912CE59144191C1204E64559FE8253a0e49E6548 on Arbitrum — I'm trying to understand how to interact with it programmatically.”
Technical details
Endpoint
GEThttps://x402helper.xyz/89e509/contract/abi?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically retrieve a smart contract's ABI from an EVM-compatible network (Base, Ethereum, Arbitrum, Optimism, Polygon, BNB) and are operating in an x402 micropayment-enabled agent environment. It is well-suited for agents that need to inspect contract interfaces before interacting with DeFi protocols or token contracts.
Side effects
- Invalid or unverified contract address returns empty or null ABI
- Unsupported network name returns an error
- Contract not verified on-chain may return no ABI
- Malformed 0x address format causes validation failure
- Payment not included or insufficient USDC results in 402 rejection
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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