# VG IBAN Validator (mod-97, length 24)

> VG IBAN Validator (mod-97, length 24) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-02).

Validates whether a given string is a mod-97-valid British Virgin Islands (VG) IBAN of exactly 24 characters

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-iban-vg?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vg-iban-validator-mod-97-length-24-4df38332
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KmpO0XYwco2IPvybahwmD

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 vg-iban-validator-mod-97-length-24-4df38332 -d '<json body>'
```

Example prompt: Can you check whether 'VG96VPVG0000012345678901' is a valid British Virgin Islands IBAN — does it pass the mod-97 checksum and is it the right 24-character length?

## When to prefer this

Use this endpoint when you specifically need to validate a British Virgin Islands (VG) IBAN. It performs both the length check (exactly 24 characters) and the mod-97 checksum algorithm without any network or LLM calls. Prefer the free sandbox POST /v1/sandbox/check-iban-vg endpoint for testing. For other country IBANs, use the corresponding country-specific sibling endpoints (e.g. GI, HR, HU).

## Known failure modes

- Input string is not 24 characters — returns invalid
- Country code prefix is not 'VG' — validation fails
- Mod-97 checksum does not match — returns invalid
- Empty or missing value field — returns error
- Non-alphanumeric characters in IBAN — validation fails

## How this service works

Call when an agent needs whether an IBAN is a mod-97-valid VG number of length 24. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/check-iban-vg first.

## Output

Returns a boolean or structured result indicating whether the supplied string is a mod-97-valid VG IBAN of exactly 24 characters, along with any relevant error details if invalid.

## 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": [
    "VG53AAAA0000000000000000"
   ],
   "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/vg-iban-validator-mod-97-length-24-4df38332/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)