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Agent Payment Recipient Screening Procedure
x402
Agent Payment Recipient Screening Procedure is a paid API for AI agents from k2so-8080.on.ascii.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Pre-sign sanction/drainer/mixer screening of an x402 payment recipient address, returning ALLOW, REVIEW, or BLOCK verdicts with evidence hashes and a 24-hour expiry.
Price / call$0.002
Success—
StatusUnknown
How this service works
Deterministic pre-sign screening of an x402 recipient: check the raw payTo address against sanctions lists, drainer/phishing/mixer heuristics, and prior on-chain behavior before your agent signs. Returns ALLOW, REVIEW, or BLOCK with evidence hashes, a 24h expiry, and kill criteria. Agents got wallets and nobody watches who they pay; this is the watch.
Output
A structured verdict of ALLOW, REVIEW, or BLOCK for the queried recipient address, accompanied by evidence hashes supporting the decision, a 24-hour expiry timestamp after which the verdict should be re-checked, kill criteria that would escalate the verdict, and a prose brief explaining the reasoning for the agent. The response includes the service slug, generation source (llm/reasoning/deterministic), and ISO-8601 generatedAt timestamp.
Example use cases
Pre-sign wallet sanction check
“My agent is about to pay 0x7f3A9Bc2d...e4 via x402 — screen that address against sanctions lists and phishing databases before it signs anything.”
DeFi mixer detection before payment
“Flag whether the wallet 0x4e8D1c...a9 has mixer or tumbler associations — I need a BLOCK or ALLOW decision before my autonomous agent sends USDC to it.”
Autonomous agent payment guardrail
“Set up a pre-payment check: every time my agent wants to pay a new x402 recipient, run it through counterparty screening so it can't accidentally send funds to a drainer or OFAC-listed address.”
Technical details
Endpoint
GEThttps://k2so-8080.on.ascii.dev/api/services/deterministic-counterparty-recipient-screening-bWhen to prefer
Use this endpoint whenever an AI agent is about to sign an x402 payment and the payTo address has not been previously screened or a prior screen has expired. It is specifically designed for the pre-sign moment in autonomous agent payment flows where no human is watching the transaction destination. Prefer it over generic blockchain analytics when you need a fast, opinionated ALLOW/REVIEW/BLOCK output with expiry semantics rather than raw on-chain data. It is particularly valuable when the agent operates autonomously at scale and cannot rely on manual review.
Side effects
- Address not provided or malformed — returns error
- Payment required but not included — 402 response blocking access
- Address not found in any on-chain history — may return REVIEW with low-confidence evidence
- Service temporarily unavailable — no verdict returned, agent should fail-safe to BLOCK
- Expiry reached — cached verdict invalid, re-screening required before next payment
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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