vkn_validate $0.001 per call

Offline structural validator for a Turkish VKN (Vergi Kimlik Numarası, 10-digit tax identification number). Normalizes input by stripping spaces/dashes, then checks that it is exactly 10 digits, all numeric, and does not start with 0. Full checksum algorithm is not applied (best-effort structural check only).

For AI agents: call vkn_validate
POST https://toll402.dev/v1/t/vkn_validate
{
 "vkn": "1234567890"
}
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": {
  "vkn": {
   "type": "string",
   "description": "VKN string, optionally with spaces or dashes"
  }
 },
 "required": [
  "vkn"
 ],
 "additionalProperties": false
}

MCP

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

All tools · OpenAPI