Guides · API

EU VAT number check API (VIES)

EU VAT number validation for all 27 member states plus Northern Ireland, via the European Commission's official VIES service: valid or invalid, and the registered company name and address where the country shares them. Format pre-check, results cached for a day. For invoicing, accounting, B2B onboarding, KYB and e-commerce agents. Input: VAT number with country prefix, e.g. IE6388047V.

0.003 USDC per call · GET /v1/eu/vat · free preview at /v1/eu/vat/preview

Parameters

Name	Required	Description
`vat`	yes	EU VAT number with its 2-letter country prefix, e.g. IE6388047V, NL859048800B01, DE811569869

Example request

curl "https://factline.dev/v1/eu/vat?vat=IE6388047V"
# 402 Payment Required: pay with an x402 client (USDC on Base), or send
# Authorization: Bearer <your Factline API key>

Example response

{
  "vat_number": "IE6388047V",
  "country_code": "IE",
  "valid": true,
  "name": "GOOGLE IRELAND LIMITED",
  "address": "3RD FLOOR, GORDON HOUSE, BARROW STREET, DUBLIN 4",
  "checked_at": "2026-10-07T17:03:24.664Z",
  "source": "European Commission VIES (VAT Information Exchange System)"
}

Use it from an AI agent

Agents with an x402 wallet call the URL directly and pay per request. Assistants that speak MCP connect to https://factline.dev/mcp. Full reference: docs, OpenAPI, llms.txt. Businesses: API keys with a free trial.

Questions

How much does the EU VAT number check API (VIES) cost?

0.003 USDC per call, paid per request with x402 (no account), or included in a Factline API key plan with a free trial. Calls that fail are not charged.

Can I try it for free?

Yes: GET /v1/eu/vat/preview with the same parameters validates your input and shows what the paid answer contains, at no cost.

Where does the data come from?

Official public registers and open data, named with their licence in every response (source field) and at /.well-known/x402-license-provenance.