nric_fin_validate $0.001 per call

Offline validator for a Singapore NRIC/FIN (National Registration Identity Card / Foreign Identification Number). Checks the 9-character format (prefix S/T/F/G/M, 7 digits, check letter) and recomputes the check letter using the publicly documented weighted modulo-11 algorithm (weights 2,7,6,5,4,3,2; offsets and prefix-keyed letter tables for S/T, F/G and M). This checksum is community-derived/unofficial (never published by the Singapore government) and is provided for format sanity-checking only, not identity verification.

For AI agents: call nric_fin_validate
POST https://toll402.dev/v1/t/nric_fin_validate
{
 "id": "S1234567D"
}
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": {
  "id": {
   "type": "string",
   "description": "NRIC/FIN string, e.g. S1234567D"
  }
 },
 "required": [
  "id"
 ]
}

MCP

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

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