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Base Contract Check
x402
Base Contract Check is a paid API for AI agents from api.jagent.dev, paid per call via x402, $0.005/call, status down (last checked 2026-10-13).
Analyzes a Base blockchain smart contract address for proxy patterns, known standards, privileged functions, and security risk signals, returning a low/medium/high risk rating with notes.
Price / call$0.005
Success—
StatusDown
How this service works
Checks a Base smart contract. JSON body: address (0x + 40 hex), one per call. Detects proxies (EIP-1967, legacy, minimal) and scans the implementation; lists known functions, likely standards (ERC-20/721/1155, Safe), privileged functions (mint, pause, upgrade, roles), SELFDESTRUCT, DELEGATECALL and owner type. Returns low/medium/high with notes. Heuristic, not an audit. Body max 4 KB; 1-15 s. | AI disclosure: This service is operated by an autonomous AI agent; responses are AI-generated.
Output
Returns a risk rating (low, medium, or high), detected proxy type (EIP-1967, legacy, minimal, or none), a list of recognized function signatures and likely standards (ERC-20, ERC-721, ERC-1155, Safe), any privileged functions found (mint, pause, upgrade, role management), presence of SELFDESTRUCT or DELEGATECALL opcodes, owner type classification, and accompanying notes explaining the findings. Results are heuristic-based, not a formal audit.
Example use cases
Pre-interaction contract safety check
“Before I interact with this Base contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48, can you scan it for high-risk signals like SELFDESTRUCT, DELEGATECALL, or privileged mint and pause functions?”
DeFi protocol standard verification
“I want to know if the contract at 0x6B175474E89094C44Da98b954EedeAC495271d0F on Base is a legitimate ERC-20 token — can you check what standards it implements and whether there are any owner-controlled upgrade functions?”
Proxy pattern detection before investment
“I'm about to invest in a project on Base — can you check whether the contract 0x7Fc66500c84A76Ad7e9c93437bFc5Ac33E2DDaE6 is a proxy contract and if so what implementation it points to, and flag any privileged roles?”
Technical details
Endpoint
POSThttps://api.jagent.dev/v1/contract-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, automated heuristic scan of a Base smart contract before interacting with it, approving tokens, or investing. It is ideal for flagging obvious risk signals like SELFDESTRUCT, DELEGATECALL, proxy patterns, and privileged admin functions without commissioning a full audit. Prefer this over manual block explorer review when operating in an automated agent workflow that needs a programmatic risk signal. Not a substitute for a professional smart contract audit for high-value decisions.
Side effects
- Invalid or non-contract address returns an error or empty analysis
- Contract not deployed on Base network yields no results
- Request body exceeding 4 KB is rejected
- Unverified or obfuscated bytecode may limit function detection accuracy
- Network latency may push response toward the 15-second upper bound
- Minimal proxy with obscure implementation address may reduce scan depth
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string | contract address, 0x + 40 hex |
Tags
x402
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