# IBAN GI (Gibraltar) Validator

> IBAN GI (Gibraltar) Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-29).

Validates whether a given string is a mod-97-compliant Gibraltar (GI) IBAN of exactly 23 characters

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-iban-gi?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/iban-gi-gibraltar-validator-89e8b518
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_B0ja9LSjsDb1_fUHC-Gdz

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-gi-gibraltar-validator-89e8b518 -d '<json body>'
```

Example prompt: Can you check whether GI75NWBK000000007099453 is a valid Gibraltar IBAN — specifically confirm it passes the mod-97 check and is the right length?

## When to prefer this

Use this endpoint when you specifically need to validate a Gibraltar (GI) IBAN against the mod-97 algorithm and the exact 23-character GI format. Prefer the free sandbox endpoint (POST /v1/sandbox/check-iban-gi) for testing. Use this paid endpoint in production workflows where confirmed validation is required. For other IBAN country codes (LT, LU, LV, MK, MR, PK, etc.), use the corresponding country-specific sibling endpoints.

## Known failure modes

- IBAN fails mod-97 checksum — returns invalid
- IBAN is not exactly 23 characters — returns invalid or format error
- String does not start with 'GI' country code — returns invalid
- Empty or null input — returns error or invalid
- Network or upstream service error — HTTP 5xx
- Payment not included or insufficient — HTTP 402

## How this service works

Call when an agent needs whether an IBAN is a mod-97-valid GI number of length 23. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/check-iban-gi first.

## Output

Returns a boolean or structured result indicating whether the provided string is a valid Gibraltar IBAN: passes mod-97 checksum, starts with the 'GI' country code, and is exactly 23 characters in length.

## 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": [
    "GI64AAAA000000000000000"
   ],
   "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/iban-gi-gibraltar-validator-89e8b518/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)