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x402 Seller Audit – On-Chain & Web Reputation Due Diligence
x402
x402 Seller Audit – On-Chain & Web Reputation Due Diligence is a paid API for AI agents from x402-endpoints.onrender.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-15).
Performs deep due diligence on an x402/ACP seller by wallet address or domain, fusing on-chain settlement reputation, OFAC screening, endpoint liveness, and web reputation into a TRUSTED/CAUTION/AVOID verdict with a signed, verifiable receipt.
Price / call$0.5
Success—
StatusUnknown
How this service works
Deep audit of an x402/ACP seller before trusting it: give a seller wallet or domain and get a full report — on-chain settlement reputation (settlements, unique counterparties, wash-trade/sybil, OFAC), the seller's advertised endpoints (from its /.well-known/x402.json), on-chain liveness, web reputation and red flags — fused into a TRUSTED/CAUTION/AVOID verdict with a signed, offline-verifiable receipt. Deeper than a pass/fail badge: the full seller due-diligence dossier for agentic payments.
Output
Returns a structured due-diligence dossier including: a top-level TRUSTED/CAUTION/AVOID verdict, on-chain settlement statistics (volume, unique counterparties, wash-trade/sybil indicators), OFAC sanctions screening result, the seller's advertised x402 endpoints from /.well-known/x402.json, endpoint liveness checks, web reputation signals and red flags — plus a signed, offline-verifiable receipt of the audit.
Example use cases
Example prompt
“Before I pay this seller, run a deep audit on 'api.example.com' — I want to know their on-chain settlement reputation, whether they're flagged on OFAC, any wash-trade or sybil signals, and whether their x402 endpoints are actually live. Use deep depth for the on-chain scan.”
Technical details
Endpoint
GEThttps://x402-endpoints.onrender.com/x402/seller-auditWhen to prefer
Use this endpoint when an AI agent needs to evaluate a new or unknown x402/ACP seller before executing a payment — especially when the stakes are non-trivial and a simple pass/fail badge is insufficient. Prefer this over generic OFAC screeners or token safety checkers when the subject is a payment API seller identified by wallet address or domain, and you need a fused multi-signal verdict (on-chain + compliance + liveness + web reputation) with a verifiable receipt.
Side effects
- Invalid or unresolvable seller domain returns a 400 or error payload
- Malformed wallet address (not 0x + 40 hex) returns a validation error
- Seller has no on-chain history, resulting in a low-confidence verdict
- OFAC or web reputation data sources temporarily unavailable, causing partial results
- Rate limiting or payment failure returns 402 or 429
- Deep depth scan may time out for wallets with very sparse activity
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"error": null,
"query": {
"depth": "shallow",
"domain": null,
"seller": "0x1D1B81247C407521E2A01F3E21514870dcf1620f",
"resolved_wallet": "0x1D1B81247C407521E2A01F3E21514870dcf1620f"
},
"cached": false,
"source": "Seller discovery + seller-trust + web signals + Claude Haiku",
"reasons": [
{
"code": "ONCHAIN_VERDICT",
"label": "On-chain seller-trust: TRUSTED (score 88)",
"weight": -0.2
}
],
"summary": "Wallet shows a healthy, diverse on-chain settlement history with no OFAC or wash-trade signals; reputation is strong.",
"verdict": "TRUSTED",
"identity": {
"domain": null,
"discovery_error": "wallet input",
"is_wallet_input": true,
"resolved_wallet": "0x1D1B81247C407521E2A01F3E21514870dcf1620f",
"discovery_available": false
},
"liveness": {
"note": "Liveness from on-chain settlement recency (real), not home probing.",
"available": true,
"active_last_30d": true,
"last_settlement": "2026-07-01T18:30:00Z",
"wallet_age_days": 168,
"last_settlement_age_seconds": 51300
},
"endpoints": {
"count": 0,
"advertised": []
},
"red_flags": [],
"timestamp": "2026-07-02T12:00:00Z",
"confidence": 0.78,
"disclaimer": "Composed x402 seller audit from on-chain settlement data, advertised discovery and public web signals. Uptime not home-probed. Heuristic, not legal/financial advice.",
"reputation": {
"level": "strong",
"notes": "Healthy diverse settlement graph, no sanctions or wash-trade signals."
},
"web_sources": [
{
"url": "https://x402-endpoints.onrender.com",
"title": "x402-endpoints"
}
],
"data_freshness": {
"mode": "llm",
"as_of": "2026-07-02T12:00:00Z",
"sources": [
"seller discovery",
"seller-trust",
"web signals",
"Claude Haiku"
],
"age_seconds": 0,
"retrieved_at": "2026-07-02T12:00:00Z",
"deterministic": false
},
"recommendation": "Safe to transact; monitor for changes on large commitments.",
"signed_receipt": {
"claims": {
"kind": "x402_seller_audit",
"issuer": "x402-endpoints.onrender.com",
"seller": "0x1D1B...620f",
"verdict": "TRUSTED",
"issued_at": "2026-07-02T12:00:00Z",
"onchain_trust_score": 88,
"endpoints_advertised": 0
},
"algorithm": "ed25519",
"available": true,
"signature": "<hex>",
"public_key": "5b77...9f9d"
},
"directory_uptime": {
"note": "Use on-chain settlement recency as liveness.",
"reason": "public directory uptime not retrievable",
"source": "402index.io",
"available": false
},
"onchain_reputation": {
"error": null,
"metrics": {
"wallet_age_days": 168,
"settlement_count": 213,
"unique_counterparties": 47
},
"verdict": "TRUSTED",
"available": true,
"confidence": 0.82,
"trust_score": 88
}
}
}Tags
x402
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