Do I need an API key or registration to use this MCP?

No. VIES is a free public service of the European Commission — every tool in this MCP works without any authentication. The batch tool is limited to 5 numbers per call out of respect for fair use.

Why do some valid VAT numbers return no company name or address?

Member states decide how much data they share through VIES. Belgium, Greece and others return validity only (match score 3 = 'no data returned'). The number is still legally valid — only the trader data is withheld. Use the matchScore legend in validate_vat_details to interpret results correctly.

EU VAT Validator (VIES) MCP Connector for Claude

A+

Official EU VIES VAT validation for all 27 member states: instant validity checks, registered company name and address, trader-match scoring, batch checks and service-status monitoring — zero auth.

8 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

The official EU VIES (VAT Information Exchange System) as a single MCP server — the European Commission's own system for validating VAT identification numbers, made agent-ready.

What you can do

Validate any EU VAT number against the live Commission registry: valid/invalid, registered trading name and full address
Trader-match scoring — approximate-match breakdown (name, street, postal code, city) with 1/2/3 scores for KYC and intra-EU B2B invoicing
Prefixed convenience checks — paste "PT501964843" or "IE6388047V" exactly as written; country auto-detected (GR→EL, UK→XI)
Small batches — validate up to 5 counterparties in one call, mixed member states
Normalize messy input — offline cleanup of CRM/invoice strings with official per-country format patterns
Service monitoring — live availability of each member state's VAT system (some go offline for maintenance)
VAT rates reference — standard and reduced rates for all member states for pricing and market-entry decisions

Why VIES and not a scraper

VIES is operated by the European Commission and is the only legally recognized source for intra-EU VAT verification. An agent that can check a counterparty's VAT number in real time can support cross-border invoicing, onboarding and compliance workflows with authoritative data — no API key, no registration.

Typical workflows

Verify a client's VAT before issuing a zero-rated intra-EU invoice
KYC: confirm the company name on file matches the VAT registration
Batch-check a CRM import of EU customers
Compare VAT rates when pricing a product launch across EU markets

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8 tools expose this connector's capabilities to your AI agent.

validate_vat_batch

Pass a JSON array of VAT numbers, each WITH its country prefix, e.g. '["PT501964843","IE6388047V","DE123456789"]'. Each entry is checked individually against VIES and returned with its own validity, name and address. For single lookups prefer validate_vat. Validate up to 5 EU VAT numbers in one call — mixed member states allowed

validate_vat_details

Use for KYC/counterparty verification when you need to confirm the customer details actually match the VAT registration — e.g. before zero-rating an intra-EU B2B supply. Note: several member states (BE, EL and others) do not return trader data; score 3 means "no data available", not a mismatch. Full VIES validation with trader-match breakdown: company name, street, postal code, city and approximate-match scores

validate_vat_prefixed

Spaces, dashes and dots are ignored. GR is mapped to EL (Greece) and UK to XI (Northern Ireland). Use when the input comes from free text, invoices or CRM records where the prefix is embedded. Validate a VAT number written WITH its country prefix (e.g. "PT501964843", "DE123456789") — country auto-detected

normalize_vat

Returns the normalized number ready for validate_vat / validate_vat_prefixed. This does NOT confirm the number is registered — always follow with a VIES check. Clean and structurally validate a raw VAT string: strips spaces/punctuation, fixes prefixes and checks the member-state format — no API call

check_vies_service_status

IMPORTANT: when a country shows Unavailable (e.g. BE or EL are periodically offline for maintenance), VIES cannot confirm numbers from that state and validation must be retried later — invoicing decisions should not rely on an unverifiable check. Also shows whether the VIES on the Web (VoW) service itself is up. Live availability of the VIES validation service for every EU member state

list_member_states

g. PT = 9 digits, NL = 9 digits + B + 2, IE = 7 digits + 1-2 chars) and a real example. Use it to pre-format numbers or to explain a validation failure caused by wrong format. Greece is "EL" (not GR) and Northern Ireland is "XI" (post-Brexit protocol). Reference table of EU member states for VIES: country codes, official VAT format patterns and examples

get_vat_rates

Use when pricing products for an EU market launch or comparing tax burden across member states. Rates are indicative and change occasionally — for legal decisions always confirm with the national tax authority (and note that VIES validates NUMBERS, not rates). Reference: current standard and reduced VAT rates for all EU member states (for pricing and market-entry decisions)

validate_vat

Required: country_code (2-letter member state: AT BE BG CY CZ DE DK EE EL ES FI FR HR HU IE IT LT LU LV MT NL PL PT RO SE SI SK XI — Greece is EL, Northern Ireland is XI) and vat_number (digits/characters WITHOUT the country prefix). A valid result includes the registered trading name and address — use it to verify a counterparty before invoicing cross-border. For the full company-match breakdown use validate_vat_details. Validate an EU VAT number against the official VIES system of any member state — returns validity, registered company name and address