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CanaryGuard Contract Info Inspector
x402
CanaryGuard Contract Info Inspector is a paid API for AI agents from canaryguard-402.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).
Inspects Base EVM smart contract bytecode size, EIP-1967/UUPS proxy implementation slots, EIP-7702 delegation designators, and verified function selectors for a given contract address.
Price / call$0.01
Success—
StatusUnknown
How this service works
Inspects Base EVM smart contract bytecode size, EIP-1967/UUPS proxy implementation slots, EIP-7702 delegation designators, and verified function selectors.
Output
Returns structured data about the target Base smart contract including: raw bytecode size in bytes, EIP-1967 and UUPS proxy implementation slot values (resolved implementation addresses if present), EIP-7702 delegation designator information, and a list of verified function selectors with their human-readable signatures where available.
Example use cases
Proxy implementation discovery
“I need to find out what implementation contract is behind the proxy at 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 on Base — check its EIP-1967 and UUPS proxy slots for me.”
EIP-7702 delegation check
“Can you check whether the contract at 0x000000000022D473030F116dDEE9F6B43aC78BA3 on Base has an EIP-7702 delegation designator set?”
Smart contract function selector audit
“Pull up the verified function selectors for the contract at 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD on Base so I can see what methods it exposes.”
Technical details
Endpoint
GEThttps://canaryguard-402.onrender.com/v1/contract-info?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically determine whether a Base contract is a proxy (EIP-1967 transparent, UUPS, or EIP-7702 delegation), resolve its underlying implementation address, audit its bytecode footprint, or retrieve verified function selectors — especially in DeFi security workflows, contract auditing pipelines, or agent workflows that interact with unknown contracts on Base.
Side effects
- Invalid or malformed contract address returns a validation error
- Address is an EOA (non-contract) with no bytecode — returns empty or zero bytecode size
- Contract not deployed on Base (chain_id 8453) returns not-found or empty response
- Rate limit or payment failure returns 402 Payment Required
- RPC timeout or Base network congestion may cause slow or failed responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain_id | integer | |
| contract_address | string | Smart contract address on Base (0x...) |
Tags
x402
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