• VALID
  • INVALID
  • REVIEW
  • REPORT

How to verify European VAT numbers with your AI

Connect isvat to your AI client once. From there, you can check tax IDs instantly through a simple chat interface.

Ask AI about this page

Short answer

How can I check EU VAT numbers using AI?

Your AI uses the isvat MCP to query official databases for single or bulk VAT validation. You'll get immediate confirmation of whether a tax ID is active and valid. This ensures your compliance data stays accurate without manual lookups.

Where every issue lands.

The outcomes of your checks

The AI sorts your VAT data into these categories based on the validation results.

VALID

Confirmed tax IDs

The AI identifies active numbers that pass all checks. You can then proceed with invoicing or shipping.

INVALID

Failed tax IDs

The AI flags numbers that are malformed or non-existent. You'll know exactly which IDs to reject.

REVIEW

Human intervention needed

If a number is suspicious or returns ambiguous data, the AI flags it for you to check manually.

REPORT

Compliance logs

The AI organizes the results into a clean summary. You can use this to audit your recent transactions.

The workflow

What your AI does when the request arrives.

The AI handles the heavy lifting of querying official EU databases.

  1. Receive input

    Your AI reads the tax IDs you provide in your chat, whether it's one number or a long list from a spreadsheet.

    validate_multiple_vat

  2. Run validation

    The AI sends the IDs to the official registry to check their current status.

    validate_eu_vatvalidate_multiple_vat

  3. Analyze results

    The AI compares the returned data against your requirements to see if the IDs are active.

    validate_eu_vat

  4. Report findings

    The AI presents a clear list of which numbers passed and which failed.

    validate_multiple_vat

Try it

Copy these to start.

Use these prompts to trigger the validation tools.

Starting points

These are basic ways to start. Swap out the bracketed text with your actual data.

isvat Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_W2NhBrGAIxd5ffyKLEpY2J1ENAhlAkdwD4MLqDAR/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 — isvat capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "isvat-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_W2NhBrGAIxd5ffyKLEpY2J1ENAhlAkdwD4MLqDAR/mcp"
    }
  }
}
Copy into chat04

  • Check if this VAT number is valid: [insert number]

  • Validate this list of EU VAT numbers from my spreadsheet: [paste list]

  • Verify the VAT ID for this client: [insert number]

  • Run a bulk check on these tax IDs: [paste list]

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

Start here

Connect isvat once, then ask.

Just click to connect. Your credentials stay encrypted and secure. Once connected, your AI can use the tools immediately.

Connect isvat to your AI

FAQ

How the task behaves

  • 01

    Can the AI fix an invalid VAT number?

    No. The AI can only check if a number is valid. It cannot change or correct tax IDs.

  • 02

    Can I check multiple numbers at once?

    Yes. You can provide a list of IDs and the AI will process them all.

  • 03

    Does the AI store my client's tax data?

    No. The AI uses the data to perform the check and then passes the result to you.

  • 04

    Can the AI automatically update my accounting software?

    No. The AI only performs the validation. You must manually update your own software with the results.

  • 05

    What happens if a VAT number is partially correct?

    The AI will report it as invalid if it doesn't match the official registry exactly.

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

Connect isvat to Claude, Cursor, ChatGPT & more