JS VAT Connector for AI agents.

1 live capability

Validate European VAT numbers and global Tax IDs for B2B billing compliance.

Live agent request JS VAT / Connector

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AI Agent

Why people use JS VAT

VAT Tax Validator for B2B Tax Compliance

This Connector changes that. Your agent can now run the math for you instantly. It checks the checksums and country-specific rules in the background, so you only have to deal with the ones that actually need your attention.

What Vinkius changes

That your agent stops guessing and starts using real math to keep your tax data clean.

Use it from Claude, ChatGPT, Cursor or another AI client you already have.

One account · 5,900+ Connectors

Real-world use case 01

Onboarding new suppliers

An agent checks a list of European VAT numbers from a new distributor to ensure they are all valid before adding them to the database.
Real-world use case 02

Creating B2B invoices

A user asks the agent to draft an invoice for a German client, and the agent checks the DE tax ID before generating the document.
Real-world use case 03

Bulk data cleaning

A manager asks the agent to scan an old spreadsheet of customer tax IDs and flag the ones that don't pass the validate_vat check.

Complete set · 1capability

The complete JS VAT capability set.

These are the exact actions your AI can choose when you ask it to work with JS VAT.

Capability set01 / 01

01

1 capability in this set.

Part of 1 available through JS VAT.

01 Capability
Validate vat
Checks a tax number against the specific mathematical rules for its country. This ensures the ID is structurally correct before you use it in your billing system.

Set up in minutes

One URL. Then ask JS VAT to work.

Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use JS VAT from the conversation.

Choose your client

Live preview

Advanced clients IDE · CLI

Claude · Web + desktop

Official guide ↗

Connector URL · ready to paste

Streamable HTTP

https://edge.vinkius.com/vk_preview_R2GmhYreLXbhdtOTpoumP5qeOFc4ejlazomdV4PZ/mcp

Step 01

Open Connectors

In Claude Web or Claude Desktop, open Settings and choose Connectors.
Step 02

Add the URL

Choose Add custom connector, name it JS VAT, and paste the URL above.
Step 03

Turn it on in chat

Select +, open Connectors, and enable JS VAT for the conversation.

ChatGPT · Web + desktop

Official guide ↗

Connector URL · ready to paste

Streamable HTTP

https://edge.vinkius.com/vk_preview_R2GmhYreLXbhdtOTpoumP5qeOFc4ejlazomdV4PZ/mcp

Step 01

Open MCP settings

On desktop, open Settings and MCP servers. On web, open your workspace app or connector settings.
Step 02

Add the URL

Choose Add server with Streamable HTTP, or create a custom MCP app, then paste the JS VAT URL.
Step 03

Save and start

Save the connection and enable JS VAT in your conversation. Desktop may ask you to restart once.

Cursor · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "vat-tax-validator": {
      "url": "https://edge.vinkius.com/vk_preview_R2GmhYreLXbhdtOTpoumP5qeOFc4ejlazomdV4PZ/mcp"
    }
  }
}

Step 01

Open MCP Settings

Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"
Step 02

Add the server config

Paste the JSON configuration above into the mcp.json file that opens
Step 03

Save the file

Cursor will automatically detect the new Connector
Step 04

Start using JS VAT

Open Agent mode in chat and ask: "Using JS VAT, help me...". 1 tools available

VS Code Copilot · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "vat-tax-validator": {
      "url": "https://edge.vinkius.com/vk_preview_R2GmhYreLXbhdtOTpoumP5qeOFc4ejlazomdV4PZ/mcp"
    }
  }
}

Step 01

Create MCP config

Create a .vscode/mcp.json file in your project root
Step 02

Add the server config

Paste the JSON configuration above
Step 03

Enable Agent mode

Open GitHub Copilot Chat and switch to Agent mode using the dropdown
Step 04

Start using JS VAT

Ask Copilot: "Using JS VAT, help me...". 1 tools available

Windsurf · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "vat-tax-validator": {
      "url": "https://edge.vinkius.com/vk_preview_R2GmhYreLXbhdtOTpoumP5qeOFc4ejlazomdV4PZ/mcp"
    }
  }
}

Step 01

Open MCP Settings

Go to Settings → MCP Configuration or press Cmd+Shift+P and search "MCP"
Step 02

Add the server

Paste the JSON configuration above into mcp_config.json
Step 03

Save and reload

Windsurf will detect the new server automatically
Step 04

Start using JS VAT

Open Cascade and ask: "Using JS VAT, help me...". 1 tools available

Cline · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "vat-tax-validator": {
      "url": "https://edge.vinkius.com/vk_preview_R2GmhYreLXbhdtOTpoumP5qeOFc4ejlazomdV4PZ/mcp"
    }
  }
}

Step 01

Open Cline MCP Settings

Click the Connectors icon in the Cline sidebar panel
Step 02

Add remote server

Click "Add Connector" and paste the configuration above
Step 03

Enable the server

Toggle the server switch to ON
Step 04

Start using JS VAT

Ask Cline: "Using JS VAT, help me...". 1 tools available

Claude Code · Terminal command

Official guide ↗

Advanced setup

claude mcp add vat-tax-validator --transport http "https://edge.vinkius.com/vk_preview_R2GmhYreLXbhdtOTpoumP5qeOFc4ejlazomdV4PZ/mcp"

Step 01

Install Claude Code

Run npm install -g @anthropic-ai/claude-code if not already installed
Step 02

Add the Connector

Run the command above in your terminal
Step 03

Verify the connection

Run claude mcp to list connected servers, or type /mcp inside a session
Step 04

Start using JS VAT

Ask Claude: "Using JS VAT, show me...". 1 tools are ready

Where the request belongs

Work JS VAT can move forward.

Built around the request

This is for the finance ops lead who can't afford a compliance audit or the e-commerce owner dealing with cross-border B2B sales. It's for anyone tired of manually double-checking every tax ID in a spreadsheet.

Finance Operations Manager

Checks supplier tax IDs during onboarding to ensure every invoice is compliant.

B2B Sales Representative

Validates customer tax info in real-time before finalizing a contract.

E-commerce Developer

Builds automated billing flows that catch invalid tax IDs before they hit the payment gateway.

Build the capability set

Each Connector adds new actions and data without changing how you work.

Browse Connectors

01 3 capabilities

isvat

Validate European VAT numbers. audit tax IDs via AI.

View Connector

02 6 capabilities

VATNode

Validate and audit VAT numbers. identify tax rates and companies via AI.

View Connector

03 4 capabilities

Vatlayer

Validate EU VAT numbers and retrieve real-time VAT rates for EU member states to ensure global tax compliance.

View Connector

04 4 capabilities

Avalara AvaTax

Manage sales tax. audit transactions, addresses, and codes via AI.

View Connector

05 3 capabilities

EU VAT Calculator

Calculate EU VAT rates, transaction taxes, and compliance rules for 27 member states.

View Connector

06 10 capabilities

Avalara (AvaTax)

Automate tax calculation and compliance with Avalara AvaTax. calculate rates and resolve addresses via AI.

View Connector

Bring your own AI

Change the model, client or framework. Keep JS VAT connected.

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Before you connect

Questions about JS VAT.

The practical details behind the request, access and result.

Does the VAT Tax Validator check if a VAT number is active?

No, it checks the mathematical structure and format of the ID. It doesn't contact government databases to see if the ID is currently registered or active.

Can I use the VAT Tax Validator for non-European tax IDs?

Yes, it supports various international Tax IDs and global formats, not just European VAT numbers.

How does the VAT Tax Validator stop my AI from making mistakes?

LLMs often hallucinate numbers that look correct but fail math checks. This Connector uses real algorithms to verify the data before your agent uses it.

Does the VAT Tax Validator work with my accounting software?

While it doesn't connect directly to your software, it ensures that the data your agent sends to capabilities like Stripe or Xero is structurally valid.

Is the VAT Tax Validator good for B2B companies?

It's a perfect fit for B2B companies that need to verify supplier and customer tax IDs to stay compliant with international tax laws.

How fast does the VAT Tax Validator perform checks?

The checks happen almost instantly because the mathematical validation is performed locally by the Connector.

Does it connect to VIES API?

No, it checks the mathematical format (checksum) local. This guarantees sub-millisecond validation without network dependency.

Which countries are supported?

All European Union member states (GB, DE, FR, IT, ES, etc).

Does it validate corporate names?

No, it purely validates the mathematical format of the VAT number itself.

One connection away

Give your agent a direct line to JS VAT.

Connect JS VAT once. Keep it beside 5,900+ managed Connectors when the next task needs more.

Explore every Connector No credit card required · Free tier available

VAT Tax Validator for B2B Tax Compliance

That your agent stops guessing and starts using real math to keep your tax data clean.

Onboarding new suppliers

Creating B2B invoices

Bulk data cleaning

Validate vat

Open Connectors

Add the URL

Turn it on in chat

Open MCP settings

Add the URL

Save and start

Open MCP Settings

Add the server config

Save the file

Start using JS VAT

Create MCP config

Add the server config

Enable Agent mode

Start using JS VAT

Open MCP Settings

Add the server

Save and reload

Start using JS VAT

Open Cline MCP Settings

Add remote server

Enable the server

Start using JS VAT

Install Claude Code

Add the Connector

Verify the connection

Start using JS VAT

Finance Operations Manager

B2B Sales Representative

E-commerce Developer

isvat

VATNode

Vatlayer

Avalara AvaTax

EU VAT Calculator

Avalara (AvaTax)

Give your agent a direct line to JS VAT.