Id National

Last 30 days

Uptime

100%

Response time

142 ms typical, 690 ms slowest 5%

Last check

1 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://api.duoleads.com/v1/id/national?country=NL&kind=bsn&value=111222333"

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.duoleads.com%2Fv1%2Fid%2Fnational
const res = await pay("https://api.duoleads.com/v1/id/national?country=NL&kind=bsn&value=111222333");
console.log(await res.json());

Example input

{
  "country": "NL",
  "kind": "bsn",
  "value": "111222333"
}

Example output

{
  "data": {
    "algorithm": "elfproef-11",
    "country": "NL",
    "derived": {},
    "formatted": "111.222.333",
    "kind": "bsn",
    "normalised": "111222333",
    "reason": null,
    "valid": true
  },
  "meta": {
    "computed_at": "2026-09-28T12:00:00.000Z",
    "deterministic": true,
    "disclaimer": "Factual output of a deterministic computation over public data. Provided as is, with no warranty of accuracy, completeness or availability. Not investment, financial, legal, tax, medical or any other professional advice, and not a recommendation. Verify before relying on it. Terms: https://api.duoleads.com/terms",
    "price_usd": "0.05",
    "request_id": "01K6B7Q4ZC8H3F2M9WXR5TYN0D"
  },
  "ok": true,
  "route": "/v1/id/national",
  "version": "1.0.0"
}

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