# Faroe Islands IBAN Validator (FO, length 18)

> Faroe Islands IBAN Validator (FO, length 18) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).

Validates whether a given string is a mod-97-compliant Faroese IBAN of exactly 18 characters.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-iban-fo?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/faroe-islands-iban-validator-fo-length-18-3b5c2629
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RxMJ6zKHTCtyxpLwoxpor

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 faroe-islands-iban-validator-fo-length-18-3b5c2629 -d '<json body>'
```

Example prompt: Can you check whether this IBAN is a valid Faroe Islands account number: FO9264600123456789?

## When to prefer this

Use this endpoint when you specifically need to validate a Faroe Islands (FO) IBAN of exactly 18 characters and want mod-97 checksum verification. It is a focused, cheap ($0.003 USDC) single-country validator. Prefer the free sandbox endpoint /v1/sandbox/check-iban-fo for testing. Use sibling endpoints for other country IBANs (LT, LU, LV, MK, MR, PK, PS, etc.).

## Known failure modes

- Input string is not 18 characters — validation returns invalid
- IBAN does not start with 'FO' country code — fails format check
- Mod-97 checksum fails — IBAN structurally plausible but mathematically invalid
- Empty or null value submitted — request rejected
- Non-string or oversized input exceeding schema limits — rejected

## How this service works

Call when an agent needs whether an IBAN is a mod-97-valid FO number of length 18. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/check-iban-fo first.

## Output

A boolean or structured response indicating whether the provided string is a valid Faroese (FO) IBAN: correctly formatted to 18 characters and passing the mod-97 checksum algorithm.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "description": "JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN."
  },
  "value": {
   "type": "string",
   "examples": [
    "FO20AAAA0000000000"
   ],
   "maxLength": 20000,
   "minLength": 1,
   "description": "Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar."
  },
  "schema": {
   "description": "JSON Schema document for schema-check SKUs. Omit it on string checks."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/faroe-islands-iban-validator-fo-length-18-3b5c2629/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)