• VALID
  • INVALID
  • MANUAL
  • CLEAN

How to validate batch tax IDs with your AI

Connect isvat to your AI client to scrub messy contact lists. Once connected, you can process entire spreadsheets of tax identifiers without manual lookups.

Ask AI about this page

Short answer

How can I validate a large list of tax IDs at once?

Your AI uses the isvat connector to run multiple identifiers through a validation check simultaneously. This identifies valid, invalid, or malformed tax IDs so you can fix your vendor data. You'll get a clear breakdown of which IDs passed and which failed.

Data outcomes

Where your data lands.

The AI sorts every identifier based on the validation results.

VALID

Confirmed identifiers

The AI flags IDs that passed all checks. You can safely move these into your active vendor database.

INVALID

Failed identifiers

These are IDs that the system rejected. You'll see exactly why they failed so you can request new info.

MANUAL

Human review needed

Some IDs might be ambiguous or partially correct. The AI flags these for you to check manually before committing them.

CLEAN

Ready for export

The AI compiles the verified list. You can then pull this clean data back into your CRM or ERP.

The workflow

What your AI does when the list arrives.

The AI handles the heavy lifting of checking each entry against official records.

  1. Ingest identifiers

    Your AI reads the raw list of tax IDs from your provided source, like a CSV or a spreadsheet.

    validate_multiple_vat

  2. Run batch checks

    The AI sends the identifiers to the validation service to check their legitimacy.

    validate_multiple_vat

  3. Analyze results

    The AI compares the response from the service against your original list to find discrepancies.

    validate_multiple_vat

  4. Categorize errors

    The AI groups the results into valid, invalid, or suspicious categories for your review.

    validate_multiple_vat

Try it

Copy these to start.

Use these prompts to kick off the validation process.

Starting points

Swap the bracketed text for your actual file names or sheet names.

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

  • Validate the tax IDs in [filename.csv] and tell me which ones are invalid.

  • Check the VAT numbers in my [Vendor List] sheet and flag any that need human review.

  • Run a batch validation on these tax identifiers: [list of IDs].

  • Look at the contact list in [spreadsheet] and extract only the valid tax IDs.

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

Start here

Connect isvat once, then ask.

Just link the isvat MCP to your preferred AI client. Your credentials stay encrypted, and you can start running batch checks immediately.

Connect isvat to your AI

FAQ

How this task behaves.

  • 01

    Can the AI automatically update my CRM with the new IDs?

    No. The AI identifies and validates the data, but you must perform the actual update in your CRM yourself.

  • 02

    Does the AI delete any of my original contact data?

    No. The AI only reads the data you provide to perform the validation. It cannot delete or modify your source files.

  • 03

    What happens if a tax ID is formatted incorrectly?

    The AI will flag it as invalid or malformed based on the validation results.

  • 04

    Can I validate IDs from different countries at the same time?

    Yes, as long as the identifiers are included in the batch you provide to the AI.

  • 05

    Will the AI tell me why a specific ID failed?

    Yes, the AI provides the reason for the failure, such as an invalid format or a non-existent identifier.

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

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