# IBAN Monaco (MC) Validator

> IBAN Monaco (MC) Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).

Validates whether a given IBAN string is a mod-97-valid Monaco (MC) IBAN with the correct length of 27 characters

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-iban-mc?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/iban-monaco-mc-validator-27b7aef8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mQGkFBsSlO4azzVqD9yzc

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-monaco-mc-validator-27b7aef8 -d '<json body>'
```

Example prompt: Can you check whether MC5811222000010123456789030 is a valid Monaco IBAN — does it pass the mod-97 checksum and have the right length?

## When to prefer this

Use this endpoint when you need to specifically validate a Monaco (MC) country IBAN for correctness before storing, processing, or routing a payment. Prefer the free sandbox endpoint POST /v1/sandbox/check-iban-mc when available to avoid the $0.005 USDC cost. Choose this over a generic IBAN validator when you need confirmed MC-specific length (27) and mod-97 logic without relying on a full library dependency.

## Known failure modes

- Input string is not 27 characters — fails length check even if checksum might pass
- Country code prefix is not MC — wrong IBAN country
- Mod-97 remainder is not 1 — checksum failure
- Empty or null input value
- Input contains spaces or non-alphanumeric characters that may cause parse error

## How this service works

Call when an agent needs whether an IBAN is a mod-97-valid MC number of length 27. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/check-iban-mc first.

## Output

Returns whether the provided string is a valid Monaco (MC) IBAN — confirming it is exactly 27 characters long and passes the ISO 13616 mod-97 checksum calculation. Likely returns a boolean validity flag and possibly a reason or error detail on failure.

## 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": [
    "MC79AAAA0000000000000000000"
   ],
   "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-monaco-mc-validator-27b7aef8/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)