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agent402.tools Contract Audit
x402
agent402.tools Contract Audit is a paid API for AI agents from agent402.tools, paid per call via x402, $0.022/call, status unknown (last checked 2026-09-13).
Audits a smart contract by combining verified source retrieval, heuristic vulnerability scanning, known-address lookup, function-selector resolution, and a read-only dry-run of given calldata
Price / call$0.022
Success—
StatusUnknown
How this service works
Bundled execution of the Contract audit workflow - Triage a smart contract before an agent interacts with it: verified Solidity source, heuristic vulnerability scan, known-address check, function-selector resolution, and a read-only dry-run of the exact call you plan to make. One x402 payment runs 5 underlying tools (contract-source, solidity-scan, selector-lookup, address-label, tx-simulate); partial-success per step.
Output
Returns a bundled audit report covering: verified Solidity source code, heuristic vulnerability scan findings, known-address database match (flagged/trusted/unknown), resolved function selectors for the contract's ABI, and the result of a read-only dry-run simulation of the provided calldata
Example use cases
Example prompt
“Before I interact with this contract, can you audit 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum — check the verified source, scan for vulnerabilities, look up if it's a known address, and do a dry-run of a balanceOf call?”
Technical details
Endpoint
POSThttps://agent402.tools/api/skill/contract-auditWhen to prefer
Choose this endpoint when an AI agent needs to triage a smart contract before executing a transaction — especially useful for DeFi interactions, NFT contracts, or any unfamiliar contract address where safety verification, source confirmation, and pre-flight simulation are all needed in a single bundled call rather than orchestrating multiple separate lookups
Side effects
- Unverified contract source — contract not verified on block explorer, source unavailable
- Unknown network — network value not in supported list (ethereum/base/polygon/arbitrum/optimism)
- Invalid address — malformed or non-contract address returns error
- Simulation failure — calldata reverts or is malformed, dry-run returns revert reason
- Rate limit or payment failure — x402 payment not accepted or insufficient USDC balance
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | string | 0x-prefixed calldata you intend to send (default: a balanceOf probe) |
| address | string | 0x-prefixed contract address to audit |
| network | string | EVM network (ethereum / base / polygon / arbitrum / optimism, default base) |
Output
Schema · Response
{
"type": "json",
"example": {
"args": {
"data": "0x70a08231000000000000000000000000abf4fabd7c416fb67202e5f9002389fc75e2a9d0",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "base"
},
"pack": "contract-audit",
"steps": [
{
"ok": true,
"slug": "contract-source",
"result": {}
},
{
"ok": true,
"slug": "solidity-scan",
"result": {}
},
{
"ok": true,
"slug": "selector-lookup",
"result": {}
},
{
"ok": true,
"slug": "address-label",
"result": {}
},
{
"ok": true,
"slug": "tx-simulate",
"result": {}
}
],
"summary": "5/5 steps succeeded"
}
}Tags
x402
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