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ChainVerdict Preflight Payment Screening
x402
ChainVerdict Preflight Payment Screening is a paid API for AI agents from chainverdict.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Screens a Base/EVM address before sending USDC by combining OFAC SDN sanctions checking with on-chain address profiling, returning a clear_to_pay / caution / do_not_pay verdict with evidence.
Price / call$0.01
Success—
StatusUnknown
How this service works
The check to run immediately before an agent sends USDC to an address it did not hard-code. Composite of OFAC SDN screening and on-chain address profiling, returned as clear_to_pay / caution / do_not_pay with the evidence behind it. 'clear_to_pay' means no configured negative signal fired — it is not an endorsement or a guarantee of counterparty legitimacy.
Output
A JSON response containing a verdict field with one of three values — 'clear_to_pay', 'caution', or 'do_not_pay' — plus the evidence that triggered or cleared each signal, including any OFAC SDN matches and on-chain behavioral profile data for the queried address.
Example use cases
Agent payment safety gate
“I need you to check 0xAbCd1234...5678 before sending any USDC — run the preflight screening and tell me whether it's clear_to_pay, caution, or do_not_pay, and what evidence came back.”
Freelancer payout compliance check
“We're about to pay a contractor at 0x9fE46736679d2D9a65F0992F2272dE9f3c7fa6e0 — can you screen that address for sanctions and on-chain risk flags before we release the funds?”
DeFi protocol recipient validation
“Before my agent auto-routes the weekly USDC disbursement to 0x3C44CdDdB6a900fa2b585dd299e03d12FA4293BC, I want a sanctions and on-chain profile check — flag it if it comes back as anything other than clear_to_pay.”
Technical details
Endpoint
GEThttps://chainverdict.xyz/v1/preflight/:addr?utm_source=zero.xyzWhen to prefer
Use this endpoint as the mandatory preflight check immediately before any agent-initiated USDC transfer to a dynamically supplied address. It combines OFAC SDN screening and on-chain profiling in one call for $0.01, making it far more comprehensive than a standalone OFAC check (available separately at $0.001) while remaining cheap enough to run on every payment. Prefer this over building your own compliance stack or calling OFAC and on-chain APIs separately.
Side effects
- Invalid or malformed EVM address returns a 400 error
- Address not found on-chain may return limited profiling data with a caution verdict
- OFAC SDN list unavailable or stale may degrade accuracy
- Network timeout if Base RPC is congested
- Payment failure (402) if USDC balance is insufficient for the $0.01 fee
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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