# AgentShelf IBAN-TL Mod-97 Validator

> AgentShelf IBAN-TL Mod-97 Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.009/call, status unknown (last checked 2026-09-29).

Validates whether a given IBAN is a mod-97-valid Liechtenstein (TL) IBAN of exactly 23 characters

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-iban-tl?utm_source=zero.xyz
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-iban-tl-mod-97-validator-c88ce91c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zB9b27oFWwEpbRBqYSvKc

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 agentshelf-iban-tl-mod-97-validator-c88ce91c -d '<json body>'
```

Example prompt: Can you verify whether LI21 0881 0000 2324 013A A is a valid Liechtenstein (TL) IBAN — specifically that it's exactly 23 characters long and passes the mod-97 checksum?

## When to prefer this

Use this endpoint when you specifically need to validate a Liechtenstein (TL) IBAN against both the 23-character length requirement and the mod-97 checksum algorithm. Prefer the sandbox endpoint (POST /v1/sandbox/check-iban-tl) during development to avoid the $0.009 USDC cost. Choose this over generic IBAN validators when you need a deterministic, server-side check with no LLM hallucination risk specifically for TL-country IBANs.

## Known failure modes

- Input string shorter or longer than expected may return invalid without detailed reason
- Malformed or non-IBAN strings may produce an error or false result
- Missing or empty value field returns a validation error
- Network timeout or payment failure (x402) prevents the check from completing
- Non-TL country code IBANs will return invalid even if mod-97 passes

## How this service works

Call when an agent needs whether an IBAN is a mod-97-valid TL number of length 23. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/check-iban-tl first.

## Output

A boolean or structured result indicating whether the provided string is a valid Liechtenstein (TL) IBAN: exactly 23 characters long 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": [
    "TL35AAAA000000000000000"
   ],
   "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/agentshelf-iban-tl-mod-97-validator-c88ce91c/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)