# AgentShelf IBAN Validator (Multi-Country)

> AgentShelf IBAN Validator (Multi-Country) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-02).

Validates whether an IBAN string matches the expected country-specific length and passes the mod-97 checksum, supporting all known country formats.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-iban?utm_source=zero.xyz
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-iban-validator-multi-country-55386716
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CF0h_lD458su4LbCL7YHR

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-validator-multi-country-55386716 -d '<json body>'
```

Example prompt: Can you check if the IBAN DE89370400440532013000 is valid — does it match Germany's expected length and pass the mod-97 checksum?

## When to prefer this

Choose this endpoint when you need to validate an IBAN from any country (multi-country support), as opposed to the country-specific sibling endpoints (e.g., dedicated CH, AT, AZ validators). Use the free sandbox POST /v1/sandbox/check-iban first for testing; use this paid endpoint in production workflows where you need authoritative validation across the full IBAN country registry.

## Known failure modes

- Invalid or missing IBAN string returns validation failure
- Unrecognized country code prefix may return unsupported or invalid
- IBAN string exceeding maxLength 20000 may be rejected
- Payment failure (HTTP 402) if USDC balance is insufficient
- Malformed input schema returns error before validation occurs

## How this service works

Call when an agent needs whether an IBAN matches a known country length and mod-97. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/check-iban first.

## Output

Returns a boolean or structured result indicating whether the submitted IBAN satisfies the country-specific expected length and passes the mod-97 checksum algorithm. May include details on which check failed (length vs checksum) 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": [
    "DE33AAAA00000000000000"
   ],
   "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-validator-multi-country-55386716/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)