brn_kr_validate $0.001 per call

Offline validator for a South Korean Business Registration Number (사업자등록번호, format XXX-XX-XXXXX). Strips hyphens to 10 digits, applies weights 1,3,7,1,3,7,1,3,5 to the first 9 digits, adds floor(d9*5/10), and compares the mod-10 check digit to the 10th digit.

For AI agents: call brn_kr_validate
POST https://toll402.dev/v1/t/brn_kr_validate
{
 "value": "123-45-67891"
}
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": {
  "value": {
   "type": "string",
   "description": "Business registration number, with or without hyphens (e.g. 123-45-67891)"
  }
 },
 "required": [
  "value"
 ],
 "additionalProperties": false
}

MCP

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

All tools · OpenAPI