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Uniswap v4 Hook Security Scanner & Rug-Check API
x402
Uniswap v4 Hook Security Scanner & Rug-Check API is a paid API for AI agents from x402.donnyautomation.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Decodes all 14 Uniswap v4 hook permission bits from a contract address on Base mainnet, flags security risks (swap custody, fee-taking, upgradeable proxies), and returns a custody class and risk profile for pre-trade safety gating.
Price / call$0.01
Success—
StatusUnknown
How this service works
Uniswap v4 hook capability scan on Base mainnet. Decodes all 14 permission bits from the hook address per v4-core Hooks.sol, flags swap custody, fee-taking and EIP-1967 upgradeability, and verifies source by Basescan/Sourcify/Blockscout consensus. Returns custodyClass PASSIVE|FLOW_CONTROL|FEE_TAKING|SWAP_CUSTODY|OPAQUE, flags[], riskFlags[] and verificationState. Requires ?address=0x + 40 hex. Errors: 400 invalid_address, 502 analysis_failed. Capability analysis - it never outputs SAFE.
Output
Returns the hook's custody class (one of PASSIVE, FLOW_CONTROL, FEE_TAKING, SWAP_CUSTODY, or OPAQUE), all 14 decoded permission bits per Uniswap v4-core Hooks.sol, specific risk flags (swap custody, fee-taking, EIP-1967 upgradeability), and source verification state via Basescan/Sourcify/Blockscout consensus. Never returns a blanket SAFE verdict — only a capability and risk analysis.
Example use cases
Pre-trade DEX router safety gate
“I'm about to route a swap through a Uniswap v4 pool on Base — can you check the hook at 0xabc123def456abc123def456abc123def456abc1 and tell me if it's PASSIVE or SWAP_CUSTODY, and whether it's verified on Basescan?”
Token scanner rug-check integration
“Run a rug check on this Uniswap v4 hook contract: 0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef on Base mainnet. I need to know if it has fee-taking permissions, is EIP-1967 upgradeable, and what risk flags come back.”
Trading bot hook permission audit
“My trading bot is evaluating a new v4 pool on Base — can you decode all 14 hook permission bits for hook address 0x0000000000000000000000000000000000000001 and classify its custody class so I can decide whether to allow trades through it?”
Technical details
Endpoint
GEThttps://x402.donnyautomation.com/v4hooksWhen to prefer
Use this endpoint when you need to perform pre-trade safety analysis specifically for Uniswap v4 hooks on Base mainnet. Prefer it over generic contract scanners because it decodes all 14 v4-specific hook permission bits and classifies custody class per Uniswap v4-core semantics, with multi-source verification consensus. Ideal for DEX routers, trading bots, and token scanners that need a fast, cheap ($0.01/call) machine-readable risk gate before executing swaps.
Side effects
- Invalid or malformed address (not 0x + 40 hex chars) returns error
- Address not on Base mainnet returns no data or error
- Unverified contract with no source returns OPAQUE custody class
- Network or RPC timeout on Base mainnet causes degraded response
- Non-hook contract address returns unexpected permission bit profile
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"flags": [
"beforeSwap",
"afterSwap",
"beforeSwapReturnDelta",
"afterSwapReturnDelta"
],
"address": "0x000052423c1db6b7ff8641b85a7eefc7b2791888",
"chainId": 8453,
"network": "base",
"deployed": true,
"verified": true,
"riskFlags": [
"SWAP_DELTA_CUSTODY"
],
"disclaimer": "Capability analysis of on-chain state. We classify what a hook CAN do; we never output SAFE.",
"upgradeable": false,
"custodyClass": "SWAP_CUSTODY",
"verificationState": "VERIFIED"
}
}Tags
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