# Toll402 LATAM Tax ID Validator (CUIT/CUIL, RUT, NIT)

> Toll402 LATAM Tax ID Validator (CUIT/CUIL, RUT, NIT) is a paid API for AI agents from toll402.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Offline validation of South American tax IDs — Argentine CUIT/CUIL, Chilean RUT, and Colombian NIT — checking check-digit correctness and returning a normalized formatted value.

## Facts

- Endpoint: POST https://toll402.dev/v1/t/latam_tax_id_validate
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/toll402-latam-tax-id-validator-cuit-cuil-rut-nit-6e62e1b9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KVYDXQ0r39DW3cU9wC-qJ

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 toll402-latam-tax-id-validator-cuit-cuil-rut-nit-6e62e1b9 -d '<json body>'
```

Example prompt: Can you check whether the Argentine CUIT 20-12345678-3 is valid — verify the check digit and give me the normalized format?

## When to prefer this

Choose this endpoint when you need lightweight, fast, offline check-digit validation for Argentine CUIT/CUIL, Chilean RUT, or Colombian NIT numbers without relying on government registry lookups. Ideal for KYC pipelines, invoice validation, supplier onboarding, or form validation where format correctness is the primary requirement.

## Known failure modes

- Malformed or non-numeric input may return a validation error
- Unsupported country tax ID types will not be recognized
- Missing required 'type' field specifying the ID kind will cause request failure
- IDs with incorrect digit count may fail before check-digit computation

## How this service works

Offline validator for South American tax IDs: Argentine CUIT/CUIL (11-digit check digit algorithm), Chilean RUT (mod-11 check digit, 0-9 or K), and Colombian NIT (mod-11 verification digit with DIAN weights). Returns whether the check digit matches and a normalized/formatted value.

## Output

Returns a JSON object with a boolean 'ok' field indicating whether the check digit is valid, along with a normalized and formatted representation of the provided tax ID.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/toll402-latam-tax-id-validator-cuit-cuil-rut-nit-6e62e1b9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from toll402.dev](https://www.zero.xyz/host/toll402.dev/llms.txt)