Marketplace · API · x402

api.duoleads.com/v1/id/national

VAT, tax ID and national ID validator: check a national identity, tax or company registration number against its country's official checksum rule. Covers 23 countries including NL BSN, ES NIF/NIE/CIF, IT codice fiscale, FR SIREN/SIRET, DE Steuer-ID, BE/PL/CZ national numbers, SE/NO/DK/FI personal numbers, BR CPF/CNPJ, AU ABN/TFN, UK NINo, IE PPS, US NPI/EIN. Structure and check digit only, no registry lookup; the number is never stored (logs keep only its length and character types).

Endpointhttps://api.duoleads.com/v1/id/national
Trust✓ Verified callable · 100% uptime over 1 checks · ~283 ms
PricingPay per call with x402, no account. Call it to get an exact quote before paying.
networkeip155:8453
schemeexact
pay to0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39
methodGET
last updated2026-10-18T05:11:35.191Z

Use it

Call it (an x402 client pays automatically)

curl -i https://api.duoleads.com/v1/id/national
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-1b9d63da7a121a98

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}