# Argentine CUIT/CUIL Validator

> Argentine CUIT/CUIL Validator is a paid API for AI agents from landingen24h.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-27).

Validates and formats an Argentine tax/identity number (CUIT or CUIL) by checking prefix, checksum, and structure — entirely offline without querying AFIP/ARCA.

## Facts

- Endpoint: POST https://landingen24h.com/api/x402/ar/cuit?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/argentine-cuit-cuil-validator-fb7c3cc7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Zd_mlpBTQHvFpulLSrto5

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 argentine-cuit-cuil-validator-fb7c3cc7 -d '<json body>'
```

Example prompt: Can you check whether the Argentine CUIT 20-12345678-6 is valid and tell me what type of entity it belongs to?

## When to prefer this

Choose this endpoint when you need fast, offline structural validation of Argentine CUIT or CUIL numbers — e.g. during form submission, data cleansing, or pre-processing steps where a live AFIP registry lookup is not required or available. It is ideal for high-throughput validation at $0.01 per call without depending on Argentine government APIs.

## Known failure modes

- Invalid or malformed CUIT format returns valid: false with no further breakdown
- CUIT with wrong checksum digit returns valid: false and shows expected_check_digit
- Missing or empty cuit field may return an error or invalid response
- No live AFIP lookup — a structurally valid CUIT for a non-existent entity will still return valid: true

## How this service works

Landing page para tu negocio en 24 horas: textos, diseño para celular y botón de WhatsApp. Boceto gratis: ves la primera versión antes de pagar. USD 39 de lanzamiento.

## Output

Returns a JSON object with: whether the CUIT/CUIL is valid, the formatted version with dashes, the normalized version without dashes, the prefix (e.g. '20', '27', '30'), the entity type ('person' or 'company'), and the expected check digit. Validation is structural and offline — no AFIP/ARCA registry lookup is performed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "cuit": {
   "type": "string",
   "maxLength": 60,
   "description": "CUIT or CUIL, with or without dashes"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "Checksum and prefix validation only (offline); does not query AFIP/ARCA.",
  "input": "20-12345678-6",
  "valid": true,
  "prefix": "20",
  "formatted": "20-12345678-6",
  "normalized": "20123456786",
  "entity_type": "person",
  "expected_check_digit": 6
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/argentine-cuit-cuil-validator-fb7c3cc7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from landingen24h.com](https://www.zero.xyz/host/landingen24h.com/llms.txt)