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Base Contract ABI
x402
Base Contract ABI is a paid API for AI agents from api.arysphere.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-17).
Returns the ABI of a smart contract on the Base network given its contract address, including proxy detection and implementation resolution.
Price / call$0.002
Success—
StatusUnknown
How this service works
ARYSPHERE sells AI-written verdicts on Base token contracts (a grade, a one-liner, a roast and the contract's facts) and Base/Ethereum chain reads, paid per call in USDC on Base over x402 v2. No account and no API key.
Output
Returns a JSON object with the contract's full ABI array, whether it's verified, whether it's a proxy (and the proxy type such as ZeppelinOSProxy), the implementation contract address and name if proxied, the queried address, and a match type indicating exact or partial ABI resolution.
Example use cases
Inspect USDC contract on Base
“Get me the ABI for the USDC contract on Base at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — I want to know if it's a proxy and what implementation it points to.”
Build a DeFi integration
“I need to integrate with a Base DeFi protocol at 0x4200000000000000000000000000000000000006 — can you pull its ABI so I know which functions I can call?”
Verify an NFT contract interface
“Can you look up the ABI for the NFT contract at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA on Base and confirm whether it's ERC-721 compliant?”
Technical details
Endpoint
GEThttps://api.arysphere.com/v1/ventures/x402_chain_reads_v1/base_contract_abi?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need the ABI of a contract specifically deployed on the Base (Coinbase L2) network, especially when proxy pattern resolution matters. Prefer this over generic Ethereum ABI fetchers when the contract is Base-native. Ideal when building integrations, auditing contract interfaces, or programmatically calling Base contracts without a hardcoded ABI.
Side effects
- Invalid address format (not 0x + 40 hex) returns validation error
- Unverified contract with no ABI available returns empty or partial result
- Contract address not found on Base returns not-found error
- Network timeout or RPC node unavailability causes request failure
- Address is an EOA (externally owned account), not a contract, returns no ABI
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"chain": "base",
"method": "abi",
"result": {
"abi": [
{
"type": "constructor",
"inputs": [
{
"name": "implementationContract",
"type": "address",
"internalType": "address"
}
],
"stateMutability": "nonpayable"
},
{
"name": "AdminChanged",
"type": "event",
"inputs": [
{
"name": "previousAdmin",
"type": "address",
"indexed": false,
"internalType": "address"
},
{
"name": "newAdmin",
"type": "address",
"indexed": false,
"internalType": "address"
}
],
"anonymous": false
},
""
],
"match": "exact_match",
"proxy": {
"isProxy": true,
"proxyType": "ZeppelinOSProxy",
"implementations": [
{
"name": "FiatTokenV2_2",
"address": "0x2Ce6311ddAE708829bc0784C967b7d77D19FD779"
}
]
},
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"isProxy": true,
"verified": true,
"implementation": "0x2Ce6311ddAE708829bc0784C967b7d77D19FD779"
},
"service": "x402_chain_reads_v1.base_contract_abi"
}
}Tags
x402
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