# EU VAT Number Validator (VIES)

> EU VAT Number Validator (VIES) is a paid API for AI agents from api.sirenic.eu, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-16).

Validates any EU intra-community VAT number against the official VIES service, returning valid/invalid/unavailable status with a VIES consultation identifier.

## Facts

- Endpoint: GET https://api.sirenic.eu/v1/tva/verifier/:numero
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/eu-vat-number-validator-vies-1e564027
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_O5pMDv4FyOEJaPyQkAttu

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-validator-vies-1e564027
```

Example prompt: Can you check if the VAT number FR27552032534 is valid and registered in the EU VIES system?

## When to prefer this

Use this endpoint when you need to validate any EU member state VAT number against the authoritative VIES system and require a consultation ID as verifiable proof — ideal for B2B invoicing compliance, onboarding new European suppliers or customers, or audit trail requirements. Prefer this over manual lookups or country-specific APIs when you need a unified endpoint covering all EU member states.

## Known failure modes

- VAT number format invalid — missing or incorrect country prefix
- VIES service temporarily unavailable — status returned as 'unavailable' rather than an error
- Member state registry offline — returns unavailable status for that specific country
- Malformed VAT number string — missing digits or invalid characters
- Payment not included — HTTP 402 returned requiring x402 micropayment of $0.003 USDC

## How this service works

EU VAT validation against the official VIES service: validate any intra-community VAT number (all member states) for compliance and due diligence. This tax id check is the tax half of verify supplier before payment, and a required check under the e-invoicing mandate France September 2026. Returns valid/invalid/unavailable status with the VIES consultation identifier as proof — VAT number validation usable across Europe for KYB and supplier onboarding.

## Output

A JSON response indicating whether the EU VAT number is valid, invalid, or temporarily unavailable, along with a VIES consultation identifier that serves as official proof of the verification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "numero"
     ],
     "properties": {
      "numero": {
       "type": "string",
       "description": "Full EU VAT number with its country prefix, e.g. FR27552032534 or DE811569869"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/eu-vat-number-validator-vies-1e564027/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sirenic.eu](https://www.zero.xyz/host/api.sirenic.eu/llms.txt)