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W System KYB Check – EU VAT, EORI & Company Validation
x402
W System KYB Check – EU VAT, EORI & Company Validation is a paid API for AI agents from api.wsystem.dev, paid per call via x402, $0.045/call, status unknown (last checked 2026-10-27).
Runs a comprehensive Know Your Business (KYB) check on a company by validating its EU VAT number (via VIES), EORI number, company registry details, and sanctions exposure, returning a pass/fail verdict with reasons.
Price / call$0.045
Success—
StatusUnknown
How this service works
One-call KYB check of an EU company: VIES VAT validation + official business register + EU/UN/OFAC/UK sanctions screening -> pass/review/fail verdict ($0.045 per company)
Output
Returns a JSON object with a 'verdict' field ('pass' or 'fail') and a 'reasons' array listing any issues found, such as invalid VAT registration, EORI mismatch, or sanctions hits. An empty reasons array with verdict 'pass' indicates the company cleared all checks.
Example use cases
Vendor onboarding VAT verification
“Before we pay this new German supplier, can you verify their VAT number DE298546298 is valid and that they pass our KYB check?”
E-commerce EU tax compliance check
“We have a new B2B customer claiming VAT ID FR12345678901 — can you check if it's legitimate and give me a pass or fail verdict before I apply the VAT exemption on their order?”
Sanctions and VAT screening for procurement
“I need to do due diligence on a Polish company with VAT ID PL1234567890 before we sign a contract — can you check if they're valid, registered, and not on any sanctions lists?”
Technical details
Endpoint
POSThttps://api.wsystem.dev/kyb/check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a combined, single-call KYB verdict that checks EU VAT validity (VIES), EORI status, company registry presence, and sanctions exposure together. It is ideal for automated vendor onboarding, B2B invoice validation, or compliance workflows where you need a structured pass/fail verdict rather than raw registry data. Prefer it over individual VAT or EORI endpoints when you want a holistic risk assessment in one call.
Side effects
- Invalid or malformed VAT number format returns a fail verdict with a formatting reason
- VIES service temporarily unavailable causes a service error
- Unknown country code in company object results in validation error
- Company not found in EU registry returns fail verdict
- Threshold parameter out of range may cause unexpected scoring behavior
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| company | — | VAT ID, 'CC:name', or {name, vatNumber, country, registryId} |
| threshold | number |
Output
Schema · Response
{
"type": "json",
"example": {
"reasons": [],
"verdict": "pass"
}
}Tags
x402
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