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mcp/harbor
Grok

UK Data: VAT number checks for Grok

uk.co.reliness/validation

Check a UK or EU VAT number against official sources and get the registered name and address

client:Grok transport:streamable-http

Install UK Data: VAT number checks in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "validation": {
      "type": "http",
      "url": "https://ukdata.reliness.co.uk/mcp/validation"
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

UK Data: VAT number checks in other clients

UK Data: VAT number checks MCP server