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Cairnworks Verify — Control Audit
x402
Cairnworks Verify — Control Audit is a paid API for AI agents from cairnworks-verify.run402.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-28).
Audits on-chain contract control structures (Safe multisig ownership, proxy detection, code size) for one or more addresses at a specific block on Base or BSC
Price / call$0.02
Success—
StatusUnknown
How this service works
cairnworks verify — fixed-price x402 (USDC on Base) checks for agent payouts: verify a Base/BSC transaction receipt and ERC-20 transfers (0.01), audit a URL's status/redirects/paywall flags (0.01), token holder and treasury share audit at a block (0.02), batch-verify up to 10 payout receipts (0.02). No account, no API key; every response is signed JSON with a sha256 evidence digest. Free sample outputs at /samples (no payment).
Output
Returns a signed JSON object with kind 'control_audit' containing the resolved block hash and number, chain and chain ID, and per-address details including whether a Gnosis Safe was detected, the list of Safe owners, the Safe signing threshold, whether a proxy (EIP-1167 minimal proxy) was detected, and the contract code size in bytes. Every response includes a SHA-256 evidence digest for tamper-evidence verification.
Example use cases
Verify DeFi treasury multisig ownership
“Check who controls the treasury contract 0xAbCd...1234 on Base at the latest block — I need to know if it's a Safe multisig, how many owners it has, and what the signing threshold is.”
Proxy contract detection for security review
“Before we integrate this protocol, can you check whether 0x7f3a...8b22 on BSC is a proxy contract and tell me its code size and who controls it as of block 48000000?”
Batch audit multiple contract addresses
“Audit these three contract addresses on Base at block 52000000 — 0x1111...aaaa, 0x2222...bbbb, and 0x3333...cccc — and tell me for each one whether it's a Safe, who the owners are, and if it's using a proxy pattern.”
Technical details
Endpoint
POSThttps://cairnworks-verify.run402.com/control-audit?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need cryptographically-evidenced, signed audit results for contract control structures (Safe multisig ownership, proxy detection) on Base or BSC without requiring an API key or account. It is particularly useful for agents that need to verify on-chain governance or treasury control at a specific historical block and want a tamper-evident SHA-256 digest of the evidence. Prefer over generic block explorers when you need structured JSON output with Safe-specific metadata and proxy detection in a single call.
Side effects
- Invalid address format (not 0x + 40 hex chars) returns validation error
- Block number not yet finalized on the requested chain
- More than 10 addresses in the batch exceeds maxItems limit
- Unsupported chain value outside base/bsc/base-sepolia enum
- Payment not received or insufficient USDC — x402 payment required before response
- RPC timeout or node unavailability for historical block queries
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| block | — | |
| chain | string | |
| addresses | array |
Output
Schema · Response
{
"type": "json",
"example": {
"kind": "control_audit",
"block": {
"hash": "0x…",
"resolved": 52784802
},
"chain": "base",
"chain_id": 8453,
"addresses": [
{
"kind": "contract",
"address": "0x60d4…9a0b",
"control": {
"safe_owners": [
"0x…"
],
"safe_detected": true,
"safe_threshold": 2
},
"proxy_171": true,
"code_size_bytes": 171
}
],
"evidence_sha256": "…"
}
}Tags
x402
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