# EU VAT Number Check

> EU VAT Number Check is a paid API for AI agents from api.facts402.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).

Validates an EU VAT number via offline format/check-digit test and a live VIES lookup, returning registration status, company name, and address.

## Facts

- Endpoint: POST https://api.facts402.com/vat?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/eu-vat-number-check-2ad0e9ec
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pbxn4-UUhE45jdKdEIi3N

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability eu-vat-number-check-2ad0e9ec -d '<json body>'
```

Example prompt: Can you check whether VAT number IE6388047V is valid and registered, and tell me the company name and address on file?

## When to prefer this

Use this endpoint when you need to verify the legitimacy of an EU VAT number for B2B invoicing, KYB, or onboarding workflows. It combines both an instant offline format and check-digit check with a live VIES lookup in a single call. Prefer it over manual VIES web lookups when automating compliance checks at scale. At $0.01 per call with no charge on unavailable member states, it is cost-effective for high-volume onboarding pipelines.

## Known failure modes

- 503 returned when EU member state VIES service is temporarily unavailable or offline (not charged)
- Invalid format returns a validation error if VAT number doesn't match the country-prefix pattern
- Unknown or unregistered VAT number returns inactive/not-found status
- Network timeouts to VIES during peak hours
- Some member states may not expose company name/address even for valid numbers

## How this service works

Use when an agent needs EU VAT number validation for B2B invoicing, KYB or onboarding: offline format and check-digit test plus a live European Commission VIES lookup returning registration status, company name and address. Busy or offline member states return 503 and are not charged. $0.01 USDC on Base; charged only on 2xx, never for invalid input.

## Output

Returns whether the VAT number passes offline format and check-digit validation, its live VIES registration status (active/inactive), the registered company name, and the registered company address. If the member state's VIES service is busy or offline, returns a 503 and the call is not charged.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "vat_number": {
   "type": "string",
   "title": "Vat Number",
   "pattern": "^[A-Za-z]{2}[A-Za-z0-9 .\\-]{2,20}$",
   "description": "EU VAT number with country prefix, e.g. IE6388047V"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/eu-vat-number-check-2ad0e9ec/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.facts402.com](https://www.zero.xyz/host/api.facts402.com/llms.txt)