Dataset · x402 · early usage

IBAN validation with no network call: ISO 13616 length and structure for every country…

by api.sitecheck-api.workers.dev · discovered, not yet claimed by its owner · updated 2026-10-11

30d calls3

30d payers3

MethodGET

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

IBAN validation with no network call: ISO 13616 length and structure for every country in the SWIFT IBAN registry, the mod-97 checksum, national check digits where a public algorithm exists (FR, ES, IT, BE, NL, NO, FI, PL, PT and the Balkan countries), and the split into bank code, branch code and account. Returns the electronic and print format. Pass ibans= for up to 50 at once. No bank name or BIC lookup (no dataset is bundled).

Tags: iban · bank · payments · validation · sepa · bazaar

Call contract

Method: GET
Input: query parameters
Output: json
Last paid call: 2026-10-11

Input example from Bazaar metadata

{
  "iban": "DE89 3704 0044 0532 0130 00"
}

Output example

{
  "account": "0532013000",
  "bankCode": "37040044",
  "bankLookup": false,
  "bban": "370400440532013000",
  "branchCode": null,
  "checks": {
    "length": "ok",
    "mod97": "ok",
    "national": "not-available",
    "structure": "ok"
  },
  "country": "Germany",
  "countryCode": "DE",
  "expectedLength": 22,
  "iban": "DE89370400440532013000",
  "ibanElectronic": "DE89370400440532013000",
  "ibanPrint": "DE89 3704 0044 0532 0130 00",
  "input": "DE89 3704 0044 0532 0130 00",
  "nationalCheck": {
    "note": "no public national check-digit algorithm is applied for this country",
    "status": "not-available"
  },
  "valid": true
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/35578.json for the price and payment options.
Pay. Call GET https://api.sitecheck-api.workers.dev/api/iban. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Solana, eip155:5042, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.001 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Solana, eip155:5042
Demand: 3 calls · 3 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.001	0xb8491F953e6860D3b5840b73c60883Ff099ceAfA	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.001	J8vnmBx4pS1X7UUBTfz1yWBKiw69Dj2yRGRHDaXBRdhR	300s
exact	eip155:5042 eip155:5042	0x3600000000000000000000000000000000000000	1000	0xa4751fCAa83c9669cfe507bb6807507729839be3	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xb8491F953e6860D3b5840b73c60883Ff099ceAfA",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "amountUsd": 0.001,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "J8vnmBx4pS1X7UUBTfz1yWBKiw69Dj2yRGRHDaXBRdhR",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "1000",
    "amountUsd": 0.001,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:5042",
    "payTo": "0xa4751fCAa83c9669cfe507bb6807507729839be3",
    "asset": "0x3600000000000000000000000000000000000000",
    "amount": "1000",
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {},
  "type": "string"
}

Examples

curl

curl "https://api.sitecheck-api.workers.dev/api/iban"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.sitecheck-api.workers.dev/api/iban");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.sitecheck-api.workers.dev/api/iban")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: api.sitecheck-api.workers.dev
Endpoint: https://api.sitecheck-api.workers.dev/api/iban
Machine-readable: /resources/35578.json