`check_vat`

Pack: vies-eu · Connect: https://pipeworx.io/mcp (see Connect below for a single-pack URL)

No MCP client? Call it directly: GET https://gateway.pipeworx.io/v1/tools/check_vat for the schema, then POST the same URL with its arguments for the data.

Validate an EU VAT number against VIES. Returns whether the number is a valid/registered EU VAT registration, plus the registered name and address when the member state publishes them (many states return ”---” or empty even for valid numbers). A false result means not registered/invalid. If the national service is temporarily down, userError is MS_UNAVAILABLE/MS_MAX_CONCURRENT_REQ etc. — treat that as “could not check”, not “invalid”.

Parameters

Name	Type	Required	Description
`countryCode`	string	yes	2-letter EU member-state code = the VAT prefix, e.g. “DE”, “FR”, “IT”. Greece is “EL” (not “GR”).
`vatNumber`	string	yes	The VAT number WITHOUT the country prefix, e.g. “811569869”. If you include the prefix (e.g. “DE811569869”) it is stripped automatically.

Example call

Arguments

{
  "countryCode": "DE",
  "vatNumber": "811569869"
}

curl

curl -X POST https://gateway.pipeworx.io/vies-eu/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"check_vat","arguments":{"countryCode":"DE","vatNumber":"811569869"}}}'

TypeScript (@pipeworx/sdk)

import { Pipeworx } from '@pipeworx/sdk';
const pipeworx = new Pipeworx();

const result = await pipeworx.call('check_vat', {
  "countryCode": "DE",
  "vatNumber": "811569869"
});

More examples

{
  "countryCode": "FR",
  "vatNumber": "75123456789"
}

Connect

Add this to your MCP client config — every tool in the catalog, including this one — or use one-click install buttons:

{
  "mcpServers": {
    "pipeworx": {
      "url": "https://pipeworx.io/mcp"
    }
  }
}

Connect to just the vies-eu pack

{
  "mcpServers": {
    "vies-eu": {
      "url": "https://gateway.pipeworx.io/vies-eu/mcp"
    }
  }
}

See Getting Started for client-specific install steps.

check_vat