x402 census · api.duoleads.com · dea06776f5fb · JSON
GET /v1/id/national
unprobed
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, no personal data stor…
Verdict: not verified by an unpaid GET. not probed yet. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://api.duoleads.com/v1/id/national |
| Method | GET |
| Price | $0.05 USDC = 50000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39 |
| Seller | api.duoleads.com |
| Catalogs | cdp (row updated 2026-09-28), payai (row updated 2026-09-29) |
| Listed since (lower bound) | 2026-09-28 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-29 |
| CDP quality counters | 1 calls and 1 unique payers in 30 days, last call 2026-09-28 (catalog-reported, not verified on chain) |
| Category (keyword rule) | dev-tools/utilities |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | Duo Data Utilities · deterministic, no-api-key, id, identifiers, validation |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 1 |
| Payments | 50 |
| USDC volume | $2.50 |
| Median payment | n/a |
| First / last payment | 2026-09-29 / 2026-09-29 |
| Sampler-shaped share of payments | n/a |
| Payers that are not samplers | n/a |
| Source | blockscout-sample — newest page of inbound ERC-20 transfers only (<=50); counts are a floor, not a total |
| Address | 0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39 |
Declared input and output (extensions.bazaar)
{
"input": {
"method": "GET",
"queryParams": {
"country": "NL",
"kind": "bsn",
"value": "111222333"
},
"type": "http"
},
"output": {
"type": "json",
"example_truncated": true,
"chars": 696
}
}
Try it (unpaid: shows the 402)
curl -si -X GET 'https://api.duoleads.com/v1/id/national' -H 'accept: application/json'
The catalog declares GET. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.
Paid checks (x402, USDC on Base)
GET https://bazaar.agentexchange.work/r/dea06776f5fb/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"dea06776f5fb"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.
Catalog references: PayAI listing status · agentic.market (CDP Bazaar front end) · this record as JSON · all resources on api.duoleads.com.