# Belgian IBAN Validator (mod-97, BE, length 16)

> Belgian IBAN Validator (mod-97, BE, length 16) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-02).

Validates whether a given string is a mod-97-valid Belgian IBAN (BE) of exactly 16 characters.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-iban-be?utm_source=zero.xyz
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/belgian-iban-validator-mod-97-be-length-16-dc3a5897
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZCGrZAPE7nIJs0Nm0sD6a

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 belgian-iban-validator-mod-97-be-length-16-dc3a5897 -d '<json body>'
```

Example prompt: Can you check whether BE68539007547034 is a valid Belgian IBAN — specifically that it passes the mod-97 checksum and is exactly 16 characters long?

## When to prefer this

Choose this endpoint when you specifically need to validate a Belgian (BE) IBAN. It is purpose-built for the BE country code and 16-character length constraint with mod-97 verification, rather than a generic multi-country IBAN validator. Prefer the unpaid sandbox endpoint POST /v1/sandbox/check-iban-be first for testing; use this paid endpoint ($0.006 USDC) in production flows where a definitive validation is required.

## Known failure modes

- Input string is empty or missing — validation fails or returns error
- IBAN does not start with 'BE' country code — invalid result
- IBAN is not exactly 16 characters — invalid result
- mod-97 checksum fails — invalid result
- Malformed JSON body — server returns 400 or similar
- Payment not included or insufficient — 402 Payment Required response

## How this service works

Call when an agent needs whether an IBAN is a mod-97-valid BE number of length 16. Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/check-iban-be first.

## Output

A boolean or structured response indicating whether the submitted string is a valid Belgian IBAN: passes the mod-97 checksum algorithm, starts with 'BE', and is exactly 16 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": [
    "BE97AAAA00000000"
   ],
   "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/belgian-iban-validator-mod-97-be-length-16-dc3a5897/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)