Endpoint · computeGETapi.duoleads.com /v1/id/national ?country=NL&kind=bsn&value=111222333
Validate a national identity, tax or company registration number against its country's official checksum rule.
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Validate 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 itself is never stored (logs keep only its length and character types).Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.05 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://api.duoleads.com/v1/id/national?country=NL&kind=bsn&value=111222333
MCP server on this host: com.duoleads.api/data-utilities
Seen
first 5 days ago · last 17 hr ago
9 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC
Listed on?
Base
Handshakescomputed 1 hr ago
0.591 from 9 free handshakes over 30 days · UNRATED ?
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 1.00 | 0.318 | 0.191 | 0 | −0.409 | |
| latency p95 it answered as fast as its class |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.591 | gap to 1.000 = 0.409 · 0.000 short · 0.409 uncertain | 0.591 | −0.000 | −0.409 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
BURN_INFREE_TIER_ONLY
Verify it yourself
npx teppi-check https://api.duoleads.com/v1/id/national?country=NL&kind=bsn&value=111222333curl -s https://api.teppi.xyz/v1/trust/cap_01M3NV250Y0EXC88FEZ80CFV5Q