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Counterparty Check
x402
Counterparty Check is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.12/call, status unknown (last checked 2026-10-11).
Validates a counterparty by checking domain age (RDAP), email deliverability (DNS), OFAC sanctions status, and LEI register existence, returning a single GO/HOLD/STOP verdict with all supporting signals.
Price / call$0.12
Success—
StatusUnknown
How this service works
One call, four public sources: how old the domain is (RDAP), whether mail to the contact will land (DNS), whether the name is on the OFAC list, and whether the company exists in the global LEI register. Returns a single GO / HOLD / STOP with every signal that produced it. Built for the moment an agent has to trust an invoice, a new vendor or a payment-detail change — the classic fraud pattern is a real-looking name on a domain registered weeks ago.
Output
Returns a single top-level verdict of GO, HOLD, or STOP along with the individual signals that produced it: domain registration age from RDAP, DNS-based email deliverability result, OFAC sanctions list match status, and LEI global company register existence check.
Example use cases
Vendor onboarding fraud screen
“We just got a new vendor application from 'Brightwave Trading Ltd' with contact email orders@brightwave-trade.com — can you do a full counterparty check on them before we add them to our system? I want to know their OFAC status, how old that domain is, and whether they show up in LEI.”
Invoice payment detail change alert
“Our finance team got a request to update bank details for 'Meridian Logistics GmbH', email ap@meridian-logi.com, domain meridian-logi.com — this is a classic fraud pattern, please run a counterparty check and tell me if we should proceed or hold.”
Pre-payment sanctions screening
“Before we wire $50k to 'Atlas Global Resources' using the contact info atlas-global-resources.com, screen them for OFAC sanctions and check if the company exists in the LEI register — give me a GO or STOP.”
Technical details
Endpoint
GEThttps://402.com.tr/api/x402/counterparty-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an agent needs to make a trust decision about a counterparty at the moment of invoice approval, vendor onboarding, or payment detail change — particularly when the classic fraud pattern (real-looking name, freshly registered domain) is a concern. It aggregates four distinct public data sources (RDAP, DNS, OFAC, LEI) into a single actionable verdict in one call, saving the need to chain multiple lookup APIs. Prefer it over individual WHOIS or OFAC checks when you need a combined risk signal rather than raw data.
Side effects
- Domain not found in RDAP — domain age signal unavailable, verdict may degrade to HOLD
- DNS lookup failure — email deliverability signal unavailable
- OFAC API unreachable — sanctions signal missing, verdict conservatively elevated
- LEI registry timeout — company existence signal unavailable
- No input parameters provided — returns 400 bad request
- Domain is very new (weeks old) — likely STOP or HOLD verdict due to fraud risk signal
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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