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SYNTHORA Contract Guard (contract_guard)
x402
SYNTHORA Contract Guard (contract_guard) is a paid API for AI agents from contract-guard.hergertsynthora.com, paid per call via x402, $0.32/call, status unknown (last checked 2026-09-14).
Analyzes a smart contract address on-chain — reading bytecode, proxy slots, and ownership — to produce a signed security verdict flagging honeypots, rug-pull vectors, hidden mints, and upgradeable proxy risks.
Price / call$0.32
Success—
StatusUnknown
How this service works
Aggregate OpenAPI for the SYNTHORA x402 mesh: 121 pay-per-call services, each on its own host under *.hergertsynthora.com, path /service, POST JSON. Per-service OpenAPI: https://<host>/openapi.json. Payment: x402, USDC on Base, payTo 0xEf879BFD6C4AccB8F795136de90246e1EC245e06 (Safe 1.3.0). Full machine catalog: https://catalog.hergertsynthora.com/catalog.json
Output
A JSON object containing: a verdict string (e.g. 'medium', 'high', 'low' risk), an array of human-readable security flags, the detected proxy standard (e.g. zeppelinos, UUPS, EIP-1967), owner address, whether the contract is verified on Sourcify, a rationale explanation, a disclaimer, and an Ed25519-signed provenance statement corroborated across at least 3 independent sources.
Example use cases
DeFi token safety check before aping
“Before I swap into this token, can you audit the contract at 0xabc123... on Base and tell me if it has hidden mint functions, a rug-pull risk, or any upgradeable proxy that could let someone change the rules on me?”
NFT contract ownership and privilege review
“I'm about to mint from this NFT contract on Base — address 0xdef456... — can you check who the owner is, whether it's verified, and if there are any centralized admin privileges I should be worried about?”
Protocol integration due diligence
“We're integrating with a DeFi protocol on Base at contract 0x789abc... — run a full security verdict on it and let me know if it's an upgradeable proxy, what standard it uses, and whether there are any critical flags like honeypot or hidden minting.”
Technical details
Endpoint
POSThttps://contract-guard.hergertsynthora.com/serviceWhen to prefer
Choose this endpoint when you need a signed, multi-source-corroborated security verdict on a specific smart contract — especially when proxy upgradeability, hidden ownership, or honeypot patterns are the concern. It is preferable to generic block explorers when you need machine-readable structured risk flags and cryptographic provenance, and over static analysis tools when you want live on-chain bytecode and storage slot reads (EIP-1967, zeppelinos, UUPS, beacon) combined. Ideal for autonomous DeFi agents that must make trust decisions before executing transactions.
Side effects
- Invalid or non-existent contract address returns an error or empty bytecode result
- Unsupported chain identifier causes a rejection
- Payment header missing or malformed results in HTTP 402 with payment requirements
- EIP-3009 authorization expired or invalid causes payment rejection
- Contract with no deployed code (EOA address) may return a null bytecode flag
- Rate limiting or network congestion on Base RPC may delay or fail the on-chain reads
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | SYNTHORA contract_guard (endpoint canonico historico, alias de contractwatch): veredicto de seguridad de contrato on-chain que SI lee el bytecode (eth_getCode) y slots de proxy (EIP-1967/zeppelinos/UU |
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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