# Open Data Proxy — IBAN Validation API

> Open Data Proxy — IBAN Validation API is a paid API for AI agents from cbs.thesoulnetwork.eu, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Validates an IBAN number and returns bank name, BIC, country, and checksum status for $0.01 USDC per call

## Facts

- Endpoint: GET https://cbs.thesoulnetwork.eu/iban?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/open-data-proxy-iban-validation-api-31711b4a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xzBZ4BIqq1PDviHHGCh0Q

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability open-data-proxy-iban-validation-api-31711b4a
```

Example prompt: Can you validate the IBAN NL91ABNA0417164300 and tell me which bank it belongs to and whether the checksum is correct?

## When to prefer this

Choose this endpoint when you need lightweight, pay-per-call IBAN validation without a subscription — ideal for low-volume or on-demand checks where you want to confirm a bank account number's structure, BIC, and issuing bank for EU/Dutch accounts. Prefer it over subscription-based IBAN validators when cost predictability at $0.01/call matters and you are already integrated with Base Mainnet x402 micropayments.

## Known failure modes

- Invalid or malformed IBAN format returns valid:false with checksum error
- Missing 'value' query parameter results in 400 bad request
- Payment failure on Base Mainnet causes 402 Payment Required before any data is returned
- Non-existent or unknown IBAN country prefix may return partial data or unknown bank

## How this service works

Pay $0.01 USDC per call to validate IBANs, EU VAT numbers and Dutch postcodes, and to query CBS housing, company, domain and EU sanctions data on Base Mainnet.

## Output

Returns a JSON object with the validated IBAN string, whether it is valid (boolean), the BIC code, the bank name, the country of the account, and a checksum validity indicator (e.g. 'valid' or 'invalid').

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "value"
     ],
     "properties": {
      "value": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "bic": "ABNANL2A",
  "bank": "ABN AMRO",
  "iban": "NL91ABNA0417164300",
  "valid": true,
  "country": "Netherlands",
  "checksum": "valid"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/open-data-proxy-iban-validation-api-31711b4a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cbs.thesoulnetwork.eu](https://www.zero.xyz/host/cbs.thesoulnetwork.eu/llms.txt)