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Toolrail Tax ID Validator (Latin America & Spain)
x402
Toolrail Tax ID Validator (Latin America & Spain) is a paid API for AI agents from toolrail.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-12).
Validates the format and check-digit rules of tax IDs for Chile, Argentina, Brazil, Mexico, Peru, Colombia, and Spain — returning whether the ID is valid, its type, and a formatted version.
Price / call$0.002
Success—
StatusUnknown
How this service works
Validate the format and supported check-digit rules of tax IDs across Latin America and Spain: Chile RUT, Argentina CUIT/CUIL, Brazil CPF/CNPJ, Mexico RFC, Peru RUC, Colombia NIT, Spain NIF/NIE. Does not verify identity or registration with a tax authority. Use when checking a Latin American or Spanish tax ID's format before saving a customer or an invoice.
Output
Returns a JSON object with: `valid` (boolean), `id` (the input ID), `type` (e.g. CPF, CNPJ, RUT, CUIT, RFC, NIT, NIF, NIE, RUC), `country` (e.g. BR, CL, AR, MX), and `formatted` (the canonical formatted form of the ID). Does not confirm registration or identity with any tax authority.
Example use cases
Customer onboarding tax ID check
“I'm onboarding a new customer from Brazil and they gave me CPF '123.456.789-09' — can you verify if that's a valid CPF before I create their account?”
Invoice pre-validation for Mexico
“Before I send this invoice, can you validate that the Mexican RFC 'GODE561231GR8' is correctly formatted and has a valid check structure?”
E-commerce checkout tax field validation
“A user at checkout entered the Colombian NIT '900123456-7' — is it valid, and what's the properly formatted version I should store?”
Technical details
Endpoint
POSThttps://toolrail.dev/validate/tax-id?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need fast, offline-style format and check-digit validation of tax IDs from Chile, Argentina, Brazil, Mexico, Peru, Colombia, or Spain before persisting customer records or invoices. Prefer it over manual regex checks because it encodes country-specific check-digit algorithms (e.g. modulo 11 for Chilean RUT, modulo 11 for Brazilian CPF/CNPJ). Do not use it to confirm whether a taxpayer is registered or active — it only validates format and structure.
Side effects
- Missing required `id` or `country` field returns a 400 error
- Unsupported country code returns an error or unknown type
- Malformed input (wrong type for fields) causes a validation failure
- Check-digit mismatch correctly returns valid=false without an error
- Network timeout or service unavailability returns a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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