# IBAN GT (Guatemala) Mod-97 Validator

> IBAN GT (Guatemala) Mod-97 Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-09-29).

Validates whether a given string is a mod-97-compliant Guatemalan (GT) IBAN of exactly 28 characters

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-iban-gt?utm_source=zero.xyz
- Price: $0.007/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/iban-gt-guatemala-mod-97-validator-b6e59849
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JWZkgTeA9A2OjE_mOsVHh

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-gt-guatemala-mod-97-validator-b6e59849 -d '<json body>'
```

Example prompt: Can you check whether GT46BAEN0000000001234567890 is a valid Guatemalan IBAN — specifically that it passes the mod-97 checksum and is exactly 28 characters long?

## When to prefer this

Use this endpoint specifically when you need to validate a Guatemalan (GT) IBAN with strict mod-97 and length-28 conformance. Prefer the free sandbox endpoint POST /v1/sandbox/check-iban-gt for testing before paying $0.007 USDC per call. For other country IBANs (LT, LU, LV, MK, MR, PK, etc.), use the corresponding country-specific sibling endpoint on the same host.

## Known failure modes

- Input string is empty or missing — returns validation error
- IBAN is correct country code but wrong length (not 28 chars) — returns invalid
- Mod-97 remainder is not 1 — returns invalid checksum
- Non-GT country code submitted — returns invalid or mismatched country
- Malformed JSON input — returns 400-level error
- Payment not attached or insufficient — returns 402 Payment Required

## How this service works

Call when an agent needs whether an IBAN is a mod-97-valid GT number of length 28. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/check-iban-gt first.

## Output

Returns a boolean or structured response indicating whether the submitted string is a valid GT (Guatemala) IBAN: exactly 28 characters long and passing the ISO 7064 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": [
    "GT77AAAA00000000000000000000"
   ],
   "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-gt-guatemala-mod-97-validator-b6e59849/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)