• VALID
  • INVALID
  • AUDIT
  • HUMAN

How to verify vendor VAT numbers with your AI

Connect Vatlayer to your AI client once. From there, you can run tax validations and pull company details through simple chat commands.

Ask AI about this page

Short answer

How do I verify vendor VAT numbers with my AI?

Your AI uses the Vatlayer connector to check EU VAT IDs against official registries. It confirms if the ID is active and pulls the registered company name and address. You'll get a clear breakdown of the registration status.

The results.

Where your data lands.

The AI handles the lookup and organizes the findings into these categories.

VALID

Confirmed tax IDs

The AI identifies active VAT numbers and pulls the official company registration details. You get a clean record of legitimate vendors.

INVALID

Flagged mismatches

If a number is fake or expired, the AI flags it immediately. This prevents you from processing invoices from unverified sources.

AUDIT

Ready for review

The AI compiles the company name, address, and tax status. You can move these details directly into your audit logs or spreadsheets.

HUMAN

Manual investigation

If the database returns a partial match or a conflict, the AI alerts you. You decide if the vendor needs further documentation.

The workflow

What your AI does when a VAT ID is provided.

The AI acts as a bridge between your chat and the official tax databases.

  1. Check ID status

    The AI sends the provided VAT number to the service to see if it exists in the EU registry.

    validate_vat

  2. Pull company info

    Once the ID is confirmed, the AI retrieves the legal name and registered address.

    validate_vat

  3. Verify registration

    The AI cross-references the tax status to ensure the company is currently active for VAT purposes.

    validate_vat

  4. Format for audit

    The AI organizes the name, address, and tax status into a structured format you can use.

    validate_vat

Try it

Copy these to start.

Use these prompts to trigger the validation process.

Starting points

Replace the bracketed text with your actual vendor details.

Vatlayer Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_Bh9Zu0CKb519DY7lPdPRc3XhRAMt15hs4jKhndjf/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Vatlayer capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "vatlayer-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_Bh9Zu0CKb519DY7lPdPRc3XhRAMt15hs4jKhndjf/mcp"
    }
  }
}
Copy into chat04

  • Validate this EU VAT number: [Insert ID here]

  • Check if the vendor with VAT [Insert ID here] is currently active.

  • Get the official company registration details for VAT [Insert ID here].

  • Verify this list of VAT numbers from my spreadsheet: [Paste list]

  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Start here

Connect Vatlayer once, then ask.

Just click the link to connect the MCP to your client. Your credentials stay encrypted, and you can start asking questions immediately.

Connect Vatlayer to your AI

FAQ

How this task behaves.

  • 01

    Can the AI fix an invalid VAT number?

    No. The AI can only report if a number is valid or invalid based on official records.

  • 02

    Does the AI store my vendor list?

    No. The AI only processes the specific IDs you provide in your chat sessions.

  • 03

    Can I verify non-EU VAT numbers?

    No. This specific tool is designed for EU VAT validation.

  • 04

    Will the AI automatically update my accounting software?

    No. The AI provides the data, but you must move that data into your software yourself.

  • 05

    What happens if a company name doesn't match the VAT ID?

    The AI will report the data exactly as the official registry provides it, allowing you to spot the discrepancy.

  • More questions about Vatlayer? The Connector page answers them. See everything the Vatlayer Connector can do

Connect Vatlayer to Claude, Cursor, ChatGPT & more