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ContractWatch – Continuous Smart Contract Security Monitor
x402
ContractWatch – Continuous Smart Contract Security Monitor is a paid API for AI agents from contractwatch.hergertsynthora.com, paid per call via x402, $0.32/call, status unknown (last checked 2026-09-14).
Monitors an EVM smart contract on Base or Ethereum and returns the current security verdict plus a diff of what changed since the last check (ownership, proxy upgrades, honeypot status, dangerous functions, etc.)
Price / call$0.32
Success—
StatusUnknown
How this service works
Continuous smart-contract monitoring and change detection. Returns the CURRENT security verdict PLUS exactly what changed since the last time this contract was checked: owner changed / ownership taken back, proxy implementation or beacon upgraded (logic swap), proxy-admin changed, Sourcify verification gained or lost, honeypot or buy/sell tax flip, new dangerous functions (mintable, pausable, blacklist, selfdestruct, hidden owner), trust-list on/off, and verdict escalation. Built on the same on-chain engine as contract_guard (web3 proxy/owner reads + Sourcify + GoPlus token & address security). Ed25519-signed. $0.32 USDC via x402 on Base. SYNTHORA.
Output
A JSON payload containing the current security verdict for the contract (honeypot status, buy/sell tax, dangerous functions, trust-list flag, proxy info, source verification) and a structured diff listing exactly what changed since the last time this contract was checked — including owner changes, proxy implementation swaps, admin changes, Sourcify verification gains/losses, honeypot or tax flips, new dangerous function appearances, and verdict escalations. Results are Ed25519-signed.
Example use cases
Example prompt
“Can you check the ContractWatch monitor for the Ethereum contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 and tell me what has changed since it was last checked — any ownership transfers, proxy upgrades, or new dangerous functions?”
Technical details
Endpoint
POSThttps://contractwatch.hergertsynthora.com/serviceWhen to prefer
Choose this endpoint when you need continuous or recurring security monitoring of a specific smart contract and want to know not just the current risk verdict but exactly what has changed since the last check — ideal for rug-pull detection, proxy upgrade surveillance, or automated security drift alerts. Prefer this over one-off audit tools when you need delta/change tracking over time at low cost per call.
Side effects
- Invalid or non-existent contract address returns an error or empty result
- Unsupported chain value returns a validation error
- Contract not yet cached — first-time check returns current verdict with no diff
- GoPlus or Sourcify APIs temporarily unavailable causing partial or failed response
- Payment not confirmed causing 402 or unauthorized error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | SYNTHORA contractwatch: verdict de seguridad de contrato on-chain que SI lee el bytecode (eth_getCode) y slots de proxy (EIP-1967/zeppelinos/UUPS/beacon), owner() y privilegios ocultos: honeypot, rug- |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"required": [
"ok",
"niche"
],
"properties": {
"ok": {
"type": "boolean"
},
"error": {
"type": "string"
},
"niche": {
"type": "string"
},
"result": {
"type": "object",
"properties": {
"chain": {
"type": "string"
},
"flags": {
"type": "array"
},
"owner": {
"type": "string"
},
"proxy": {
"type": "boolean"
},
"address": {
"type": "string"
},
"changed": {
"type": "boolean"
},
"changes": {
"type": "array"
},
"verdict": {
"type": "string"
},
"verified": {
"type": "boolean"
},
"rationale": {
"type": "string"
},
"proxy_standard": {
"type": "string"
}
}
},
"receipt": {
"type": "object"
}
}
},
"example": {
"ok": true,
"niche": "contract_guard",
"result": {
"chain": "base",
"flags": [
"código NO verificado en Sourcify",
"PROXY actualizable (zeppelinos) — el admin/owner puede cambiar la lógica (impl 0x2Ce6311d…)",
"..."
],
"owner": "0x3ABd6f64A422225E61E435baE41db12096106df7",
"proxy": true,
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"verdict": "medium",
"verified": false,
"rationale": "SIN verificar. Proxy actualizable (zeppelinos: riesgo de cambio de lógica). Tiene owner/control centralizado.",
"disclaimer": "No es consejo financiero. Análisis automatizado de seguridad on-chain con procedencia firmada.",
"proxy_standard": "zeppelinos"
},
"provenance": "<3 fuentes independientes>"
}
}Tags
x402
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