# IBAN Validator

> IBAN Validator is a paid API for AI agents from gateway.apiosk.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Validates an IBAN string, checking its format, checksum, and returning the associated country and bank name

## Facts

- Endpoint: POST https://gateway.apiosk.com/financial-identifiers/validate/iban
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/iban-validator-62fb3e4f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ni4AKSF6M15tLOtjHjaTR

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 iban-validator-62fb3e4f -d '<json body>'
```

Example prompt: Can you check whether this IBAN is valid and tell me what bank and country it belongs to: NL91ABNA0417164300?

## When to prefer this

Use this endpoint when you need to verify an IBAN before initiating a financial transaction, onboarding a user, or storing bank details — especially when you need both format/checksum validation AND enrichment (country and bank name) in a single call. Prefer this over manual regex checks when you need authoritative bank name resolution across multiple countries.

## Known failure modes

- Invalid IBAN format returns valid=false with checksum_valid=false
- Unsupported country prefix may return valid=false or unknown bank_name
- Empty or missing iban field returns a 400 or error response
- Non-string input or malformed JSON body returns a parsing error
- Network timeout or upstream service unavailability returns a 5xx error

## How this service works

Validate IBAN country format, length, mod-97 checksum and return a bundled static bank-code lookup when known.

## Output

Returns a JSON object indicating whether the IBAN is valid (true/false), whether the checksum passed, the two-letter country code (e.g. 'NL'), and the resolved bank name (e.g. 'ABN AMRO').

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/iban-validator-62fb3e4f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gateway.apiosk.com](https://www.zero.xyz/host/gateway.apiosk.com/llms.txt)