# IBAN Validator

> IBAN Validator is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0005/call, status down (last checked 2026-09-15).

Validates an IBAN (International Bank Account Number) string for correctness and format compliance

## Facts

- Endpoint: POST https://api.fastapi.online/iban-validate
- Price: $0.0005/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/iban-validator-d26f74a3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uR16DEDTwNEWTlznh-uPf

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-d26f74a3 -d '<json body>'
```

Example prompt: Can you check if this IBAN is valid: GB29NWBK60161331926819?

## When to prefer this

Choose this endpoint when you need a fast, cheap ($0.0005 per call), no-signup IBAN validation that can be called programmatically with crypto payment (x402). Prefer it for lightweight validation in payment workflows, form validation, or agent-driven finance automation where you want a dedicated IBAN check without integrating a full banking SDK.

## Known failure modes

- IBAN string too short (below 4 characters) or too long (above 40 characters) returns a validation error
- Malformed IBAN with invalid checksum returns invalid status
- Unsupported or unrecognized country code prefix may return invalid
- Network timeout or service unavailability returns HTTP 5xx
- Missing or empty IBAN field returns a 422 unprocessable entity error

## How this service works

Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&amp;A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding &amp; crypto utilities, date/time calculators, geo/coordinate math, math &amp; finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.

## Output

Returns a validation result indicating whether the supplied IBAN string is valid, including likely details such as country code, check digits status, bank code, and account number components extracted from the IBAN.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "iban": {
   "type": "string",
   "maxLength": 40,
   "minLength": 4
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/iban-validator-d26f74a3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fastapi.online](https://www.zero.xyz/host/api.fastapi.online/llms.txt)