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Contract ABI Lookup by Address and Chain
x402
Contract ABI Lookup by Address and Chain is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.018/call, status unknown (last checked 2026-09-15).
Fetches and parses the verified ABI for a smart contract by address and chain, returning function signatures, event names, and full decoded JSON ABI.
Price / call$0.018
Success—
StatusUnknown
How this service works
Verified contract ABI by address and chain, returned as parsed JSON plus function and event name lists, from a block explorer behind an API key. Lets an agent decode and interact with a contract. contract abi, get abi, decode contract, function signatures, smart contract interface
Output
Returns the full verified contract ABI as parsed JSON, along with a list of function names and their signatures (including parameter types) and a list of event names emitted by the contract — everything needed to encode calls or decode logs.
Example use cases
Example prompt
“Can you pull the verified ABI for the Uniswap V3 router contract at 0xE592427A0AEce92De3Edee1F18E0157C05861564 on Ethereum mainnet (chain ID 1)? I need the full function and event list so I can figure out how to call it.”
Technical details
Endpoint
GEThttps://api.x402node.dev/contract/abiWhen to prefer
Use this endpoint when you need the verified ABI for a specific smart contract to encode function calls, decode transaction data, or inspect available methods and events. Prefer this over manual ABI guessing or generic tools when you have a contract address and need authoritative, parsed ABI data backed by a block explorer.
Side effects
- Contract address not verified on the block explorer — returns error or empty ABI
- Unsupported chain ID — returns error indicating chain not available
- Invalid contract address format — returns validation error
- Block explorer API key rate limit hit — returns upstream error
- Contract is a proxy and ABI reflects proxy not implementation — may return incomplete interface
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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