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SperaxOS Contract ABI Fetcher
x402
SperaxOS Contract ABI Fetcher is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-03).
Retrieves the ABI (Application Binary Interface) for any EVM smart contract on supported chains, payable via x402 micropayment
Price / call$0.001
Success—
StatusUnknown
How this service works
AI-powered DeFi intelligence APIs payable via the x402 HTTP payment protocol. No API key required — pay per request with USDC on Base. Identity-only (SIWX) endpoints are free for wallets with an agentcash identity.
Output
Returns the full ABI JSON array for the specified smart contract, including all function signatures (name, inputs, outputs, state mutability), event definitions, and error types — enabling programmatic interaction with the contract.
Example use cases
Inspect DeFi protocol contract interface
“I need the ABI for the Uniswap V3 pool contract at 0x8ad599c3A0ff1De082011EFDDc58f1908eb6e6D8 on Ethereum — I want to know what functions I can call on it.”
Build integration with Arbitrum contract
“Can you pull the ABI for the contract at 0x912CE59144191C1204E64559FE8253a0e49E6548 on Arbitrum? I'm trying to integrate with it and need to know its interface.”
Debug event logs from Base contract
“What events does the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base emit? Please fetch its ABI so I can decode the logs I'm seeing.”
Technical details
Endpoint
POSThttps://chat.sperax.io/api/x402/tools/contract-explorer/getContractABI?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically interact with a smart contract and require its ABI without manually searching block explorers like Etherscan. Ideal for AI agents building DeFi integrations, decoding transaction data, or inspecting contract interfaces on the fly — especially when no API key is available and pay-per-use micropayments via x402 are preferred.
Side effects
- Unverified or unverifiable contract — ABI not available if contract source was not published/verified on the block explorer
- Invalid address format — returns error if address is not a valid 0x EVM address
- Unsupported chain — returns error if chain name is outside the supported set (ethereum, arbitrum, polygon, base, optimism, avalanche, bsc)
- Payment failure — x402 payment rejected or insufficient USDC balance
- Proxy contract — may return proxy ABI rather than implementation ABI
- Contract not found — address has no deployed contract on specified chain
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Chain name: ethereum, arbitrum, polygon, base, optimism, avalanche, bsc. Defaults to ethereum. |
| address | string | EVM contract address (0x…) |
Tags
x402
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