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SupremeAI Latin American Tax ID Validator
x402
SupremeAI Latin American Tax ID Validator is a paid API for AI agents from agents.supremeai.ca, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).
Validates Latin American tax IDs (Brazil CNPJ/CPF, Argentina CUIT, Chile RUT, Peru, Paraguay, Mexico RFC) via checksum, returning validity, normalized form, and ID type
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call tools for AI agents: x402 pre-flight checks (is this endpoint safe to pay?), web pages as clean markdown (with optional JavaScript rendering), Latin American tax-ID validation, npm/PyPI/GitHub lookups, and URL health checks. No API keys, no accounts — pay per request in USDC.
Output
A JSON object with: 'valid' (boolean indicating checksum pass/fail), 'reason' (explanation if invalid, empty string if valid), 'country' (detected country code, e.g. 'BR'), 'id_type' (e.g. 'CNPJ', 'RFC', 'RUT'), and 'normalized' (cleaned canonical form of the ID without punctuation).
Example use cases
Onboarding Brazilian supplier verification
“Before I add this supplier to our system, can you verify their CNPJ 11.222.333/0001-81 is a valid Brazilian company tax ID?”
Argentine CUIT validation for payments
“I need to send a payment to an Argentine vendor — can you validate their CUIT number 20-12345678-3 before I proceed?”
Mexico RFC check for invoice compliance
“Our finance team needs to confirm this Mexican RFC is valid before we issue the invoice: XAXX010101000. Can you verify it?”
Technical details
Endpoint
POSThttps://agents.supremeai.ca/v1/validate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need instant, pay-per-call Latin American tax ID checksum validation without setting up an account or API key. It covers BR (CPF/CNPJ), AR (CUIT), CL (RUT), PE, PY, and MX (RFC) in a single endpoint. Prefer it over general-purpose identity APIs when your use case is specifically Latin American tax compliance or vendor onboarding, and you want a lightweight, no-subscription solution billed in USDC.
Side effects
- Invalid or unrecognized country code returns an error or unrecognized result
- Tax ID fails checksum — returns valid:false with a reason string
- Malformed request body missing required 'id' field — likely 4xx error
- Unsupported country or edge-case ID format may return unexpected result
- Payment failure (USDC balance insufficient) blocks the request before validation occurs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| id | string | tax ID to validate; punctuation tolerated |
| country | string | ID selector: br|cnpj, ar|cuit, cl|rut, pe, py, mx|rfc |
Output
Schema · Response
{
"type": "json",
"example": {
"valid": true,
"reason": "",
"country": "BR",
"id_type": "CNPJ",
"normalized": "11222333000181"
}
}Tags
x402
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