finance by fourzerotwo

Validate a VAT number format

Country format and check digit for UK (GB/XI) and EU VAT numbers. Does not confirm registration.

Validate a VAT number format Free

Country format and check digit for UK (GB/XI) and EU VAT numbers. Does not confirm registration.

cost: Free then $0.001 / call
MCP tool: vat__validate-format
method: GET

Free up to 50 calls a day over MCP (500 with a free key), then $0.001 per call by card credit or USDC. Free key · Pay by card

GET https://fourzerotwo.si/v1/vat/validate-format

Param	Type	Description
vat_number	string	VAT number with country prefix

# free: send a free key from https://fourzerotwo.si/free
curl -H "X-API-Key: fzt_…" "https://fourzerotwo.si/v1/vat/validate-format?vat_number=GB980780684"

# no key: returns 402 with the price, for x402 agents
curl -i "https://fourzerotwo.si/v1/vat/validate-format?vat_number=GB980780684"

by fourzerotwo

Report this endpoint

Use it from an AI agent (MCP)

Add the server once, then ask for this data in plain English. The agent finds the endpoint with search_apis and runs it with call_api.

{
  "mcpServers": {
    "fourzerotwo": { "type": "http", "url": "https://fourzerotwo.si/mcp" }
  }
}

# the call the agent makes
call_api {"tool": "vat__validate-format", "arguments": {"vat_number":"GB980780684"}}

Validate a VAT number format

Validate a VAT number format Free

Use it from an AI agent (MCP)

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