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402Sentinel x402 Counterparty Risk Gate
x402
402Sentinel x402 Counterparty Risk Gate is a paid API for AI agents from 402sentinel.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Assesses an x402 payment counterparty's on-chain risk before payment, returning a 0-100 risk score and an allow/review/block decision based on settlement behavior.
Price / call$0.02
Success—
StatusUnknown
How this service works
Pre-pay COMPLIANCE screen for regulated onchain flows. POST {target:{payto_address, agent_id?}, payment_context?:{amount,asset}} returns compliance_decision pass/flag/block, diligence_tier, obligations and checks: OFAC sanctions (hard block), counterparty due-diligence tier, structuring detection (sub-threshold payments aggregating within 24h, needs agent_id), FATF Travel-Rule threshold as informational. Screening support, not legal advice.
Output
Returns a 0-100 risk score, an allow/review/block decision, and supporting signals derived from on-chain settlement behavior including address age, payer diversity, and settlement maturity. Enables the calling agent to gate or proceed with an x402 payment automatically.
Example use cases
Example prompt
“Before I pay this x402 API, run a risk check on the counterparty address 0x6a5e7d954f49712abf3f873f037ec845b7b8c666 on Base — I want at least 0.5 confidence and I'm planning to pay up to $10 USDC, so flag anything over $5 for review.”
Technical details
Endpoint
POSThttps://402sentinel.com/api/complianceWhen to prefer
Use this endpoint when your AI agent is about to make an x402 pay-per-call payment and needs to assess counterparty risk before committing funds. It is specifically designed for the x402 protocol and on-chain settlement behavior on Base, making it superior to generic blockchain analytics tools that lack x402-specific signals like facilitator-aware payer diversity and settlement maturity.
Side effects
- Unknown or brand-new address with no on-chain history returns low confidence score and likely a review/block decision
- Invalid or malformed payto_address causes a validation error
- Network not supported returns an error or empty result
- Payment for the compliance check itself fails (x402 payment required, $0.02 USDC on Base)
- Timeout if on-chain data indexing is delayed
Input
{
"policy": {
"min_confidence": 0.5,
"max_payment_usdc": 50,
"review_ceiling_usdc": 5
},
"target": {
"payto_address": "0x6a5e7d954f49712abf3f873f037ec845b7b8c666"
},
"payment_context": {
"asset": "USDC",
"amount": 10
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| target | object | The payee to screen (+ optional payer agent_id for structuring detection). |
| payment_context | object | Payment amount drives the Travel-Rule threshold check. |
Output
{
"as_of": "2026-06-12T05:13:10+00:00",
"checks": {
"sanctions": {
"hit": false,
"source": null,
"list_size": 97
},
"structuring": {
"note": "no agent_id provided — structuring analysis needs the payer's id",
"available": false,
"screening_skipped": true
},
"travel_rule": {
"note": "INFORMATIONAL — Travel-Rule reporting thresholds VARY BY JURISDICTION (EU/MiCA: ALL crypto transfers, no de-minimis; US/FinCEN: ~$3,000; FATF reference: ~$1,000) and the obligation falls on VASPs, not the paying agent. Does not change the pay decision.",
"amount": 10,
"fatf_reference_usd": 1000,
"at_or_above_fatf_reference": false
},
"counterparty_risk": {
"decision": "allow",
"confidence": 0.85,
"risk_score": 18
}
},
"disclaimer": "Automated screening to support compliance workflows — not legal advice and not a substitute for your own AML/KYC program.",
"obligations": [
"provide_agent_id_for_structuring_screening"
],
"diligence_tier": "standard_due_diligence",
"recommendation": "Compliant for this amount under standard due diligence.",
"compliance_decision": "pass",
"counterparty_assessment_id": "ca_6697c90897cce19360"
}Tags
x402
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