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Base Contract ABI Fetcher with Proxy Detection
x402
Base Contract ABI Fetcher with Proxy Detection is a paid API for AI agents from defi-shield-hazel.vercel.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).
Fetches the verified ABI for a smart contract address on the Base blockchain, with automatic proxy contract detection and resolution
Price / call$0.1
Success—
StatusUnknown
Output
Returns the verified ABI (as a JSON array of function/event definitions) for the given Base contract address, with proxy detection — if the contract is a proxy, the ABI returned is for the underlying implementation contract, not just the proxy shell.
Example use cases
Example prompt
“Can you fetch the verified ABI for the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base, and make sure you resolve the actual implementation if it's a proxy?”
Technical details
Endpoint
POSThttps://defi-shield-hazel.vercel.app/api/data/contract-abiWhen to prefer
Use this endpoint when you need to interact programmatically with a Base smart contract and require its ABI, especially when the contract may be a proxy (EIP-1967, transparent, UUPS) and you need the real implementation ABI rather than the proxy's minimal interface. Prefer over raw Etherscan API calls when proxy detection and resolution is needed automatically.
Side effects
- Contract address not verified on Base — unverified contracts have no ABI available
- Invalid or malformed contract address — returns error
- Contract is a proxy but implementation is unverified — partial or no ABI returned
- Network errors reaching Base RPC or Etherscan-compatible API
- Rate limit or payment failure for the $0.1 USDC per-call fee
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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