vat_th_validate $0.001 per call

Offline validator for a Thai VAT registration number: verifies the 13-digit Tax ID via the mod-11 check digit algorithm and validates the accompanying 5-digit branch code format (00000 = head office, otherwise a branch number). No network access used.

For AI agents: call vat_th_validate
POST https://toll402.dev/v1/t/vat_th_validate
{
 "taxId": "1234567890121",
 "branchCode": "00000"
}
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": {
  "taxId": {
   "type": "string",
   "description": "13-digit Thai Tax ID, digits only or with dashes/spaces"
  },
  "branchCode": {
   "type": "string",
   "description": "5-digit branch code, defaults to 00000 (head office) if omitted"
  }
 },
 "required": [
  "taxId"
 ]
}

MCP

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

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