# Saylor Innovations EU VAT Number Validator (VIES)

> Saylor Innovations EU VAT Number Validator (VIES) is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Validates a European VAT number against the EU VIES system and returns the validity status along with the registered business name and address.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/util/vat?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-eu-vat-number-validator-vies-4f53c943
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TlkHYTUsDlna2RxQEaZ-_

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 saylor-innovations-eu-vat-number-validator-vies-4f53c943
```

Example prompt: Can you check whether the VAT number IE6388047V is valid and tell me what company name and address are registered to it?

## When to prefer this

Choose this endpoint when you need a lightweight, per-call VAT validation with no subscription required — especially suited for AI agents or automation workflows that need occasional EU VAT checks at low cost ($0.002/call via x402). Prefer this over building a direct VIES SOAP integration when you want a simple REST/JSON interface. It is ideal for invoice validation, supplier onboarding, and B2B compliance checks across EU member states.

## Known failure modes

- Invalid or malformed VAT number format returns valid: false with null name and address
- Country prefix not recognized or unsupported may return an error or invalid result
- VIES system temporarily unavailable (EU VIES has known downtime) may result in an error response
- Missing 'number' query parameter causes a bad request error
- Rate limiting or payment failure (x402) prevents the call from completing

## How this service works

EU VAT number validation (VIES) — Real-world Data

## Output

A JSON object containing the submitted VAT number, a boolean 'valid' field indicating whether the number is active in VIES, and nullable fields for the registered business name and address (which may be null if VIES does not return them even for valid numbers).

## 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",
      "POST",
      "PUT",
      "PATCH",
      "DELETE",
      "HEAD"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "number": {
       "type": "string",
       "description": "VAT number with country prefix, e.g. IE6388047V (query)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "vat_number",
      "valid"
     ],
     "properties": {
      "name": {
       "type": [
        "string",
        "null"
       ]
      },
      "valid": {
       "type": "boolean"
      },
      "address": {
       "type": [
        "string",
        "null"
       ]
      },
      "vat_number": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-eu-vat-number-validator-vies-4f53c943/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)