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x402 Seller Trust Score
x402
x402 Seller Trust Score is a paid API for AI agents from x402-endpoints.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).
Analyzes an x402 seller wallet's on-chain USDC settlement history on Base to produce a trust score, verdict, and signed receipt for pre-payment due diligence
Price / call$0.01
Success—
StatusUnknown
How this service works
Score an x402 seller wallet BEFORE paying it: verdict TRUSTED/CAUTION/AVOID + confidence from its on-chain settlement graph on Base — settlement count, unique paying counterparties, wallet age, wash-trade and sybil signals — with a signed, offline-verifiable receipt. Vet an unknown x402 endpoint or merchant wallet before you pay: scam, fake-volume wash-trader or sybil cluster? Agent counterparty risk, seller reputation and trust score for x402 / agentic payments.
Output
Returns a structured JSON with: trust_score (0-100), verdict (TRUSTED/UNTRUSTED), confidence (0-1), wallet_age_days, settlement_count, received_volume_usdc, unique_counterparties, top_counterparty_share, amount_uniformity, one_shot_payer_ratio, an array of reason codes with labels and weights, OFAC screening status, data freshness metadata, and a signed ed25519 receipt with verifiable claims about the verdict.
Example use cases
Example prompt
“Before my agent pays this x402 seller, run a shallow trust check on wallet 0x1D1B81247C407521E2A01F3E21514870dcf1620f and tell me the trust score, verdict, and how many unique counterparties have paid them on Base.”
Technical details
Endpoint
GEThttps://x402-endpoints.onrender.com/x402/seller-trust?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent is about to pay an x402 API and needs machine-readable pre-payment clearance on the seller's wallet. It is specifically designed for the x402 micropayment ecosystem where no API key exists and payment is authentication — making trust verification critical before spending funds. Prefer this over generic blockchain explorers when you need a structured verdict, OFAC screening, and a cryptographically signed receipt in a single call.
Side effects
- Invalid wallet address format (not 0x + 40 hex) — returns 400 validation error
- Unknown or zero-activity wallet — returns low trust score or UNTRUSTED verdict with sparse metrics
- OFAC list unavailable — ofac_list_loaded: false, verdict may be degraded
- Chain data temporarily unavailable — cached: false with stale or missing metrics
- Payment not received (x402 protocol failure) — 402 Payment Required before data is returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"error": null,
"query": {
"depth": "shallow",
"seller_wallet": "0x1D1B81247C407521E2A01F3E21514870dcf1620f"
},
"cached": false,
"metrics": {
"wallet_age_days": 168,
"first_settlement": "2026-01-12T09:00:00Z",
"settlement_count": 213,
"amount_uniformity": 0.18,
"one_shot_payer_ratio": 0.62,
"received_volume_usdc": 19.4,
"unique_counterparties": 47,
"top_counterparty_share": 0.11,
"counterparty_diversity_ratio": 0.221
},
"reasons": [
{
"code": "UNIQUE_COUNTERPARTIES",
"label": "47 distinct paying counterparties",
"weight": -0.5
},
{
"code": "COMPOSITE_SCORE",
"label": "Composite trust score 88/100",
"weight": -0.1
}
],
"verdict": "TRUSTED",
"timestamp": "2026-06-29T12:00:00Z",
"confidence": 0.82,
"disclaimer": "Trust derived from incoming USDC transfers on Base as a settlement proxy; not all incoming USDC is an x402 settlement. Not advice.",
"trust_score": 88,
"data_freshness": {
"as_of": "2026-01-12T09:00:00Z",
"chain": "base",
"sources": [
"Base Blockscout USDC transfers (settlement proxy)",
"OFAC SDN crypto addresses"
],
"age_seconds": 14515200,
"retrieved_at": "2026-06-29T12:00:00Z",
"deterministic": true,
"ofac_list_loaded": true
},
"signed_receipt": {
"claims": {
"kind": "x402_seller_trust",
"issuer": "x402-endpoints.onrender.com",
"verdict": "TRUSTED",
"issued_at": "2026-06-29T12:00:00Z",
"trust_score": 88,
"seller_wallet": "0x1D1B...620f",
"settlement_count": 213,
"unique_counterparties": 47
},
"algorithm": "ed25519",
"available": true,
"signature": "<hex>",
"public_key": "5b77f2e95c3eee40403453e942834b703383e15fca50d11fdd28633ca5dd9f9d"
}
}
}Tags
x402
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