vat_no_validate $0.001 per call

Offline validator for a Norwegian VAT (MVA) number: strips an optional 'NO' prefix and the required 'MVA' suffix, then validates the remaining 9-digit Organisasjonsnummer using the mod-11 check-digit algorithm (weights 3,2,7,6,5,4,3,2 applied to the first 8 digits). No network access required.

For AI agents: call vat_no_validate
POST https://toll402.dev/v1/t/vat_no_validate
{
 "vatNumber": "NO923609016MVA"
}
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": {
  "vatNumber": {
   "type": "string",
   "description": "Norwegian VAT number, e.g. NO923609016MVA or 923609016MVA"
  }
 },
 "required": [
  "vatNumber"
 ],
 "additionalProperties": false
}

MCP

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

All tools · OpenAPI