vat_fi_validate $0.001 per call

Offline validator for a Finnish VAT number (ALV-tunnus, format FIxxxxxxxx). Strips the 'FI' prefix, treats the remaining 8 digits as a Y-tunnus (business ID) with a hyphen re-inserted before the last digit, and verifies the check digit using the Finnish Y-tunnus mod-11 algorithm (weights 7,9,10,5,8,4,2).

For AI agents: call vat_fi_validate
POST https://toll402.dev/v1/t/vat_fi_validate
{
 "vat": "FI24644919"
}
Answers 402 with x402 payment requirements; pay with any x402 client (@x402/fetch, x402 for Python, toll402-client, toll402-mcp) or send a prepaid-credits key as x-toll402-key (https://toll402.dev/credits). Paid per call via x402 (USDC on Base) or with a prepaid-credits key (x-toll402-key, card at /credits); charged only on success. Start at /llms.txt or connect the MCP server: npx -y toll402-mcp · remote https://toll402.dev/mcp.

Input schema

{
 "type": "object",
 "properties": {
  "vat": {
   "type": "string",
   "description": "Finnish VAT number, e.g. FI24644919"
  }
 },
 "required": [
  "vat"
 ]
}

MCP

{"mcpServers":{"toll402":{"command":"npx","args":["-y","toll402-mcp"],"env":{"TOLL402_WALLET_KEY":"0x..."}}}}

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