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Losbeto Brazilian CNPJ/CPF Validator
x402
Losbeto Brazilian CNPJ/CPF Validator is a paid API for AI agents from markets.losbeto.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Validates Brazilian CNPJ or CPF tax identifiers using modulo-11 check digits, returning formatted output and whether a CNPJ is a headquarters branch — no external registry calls required.
Price / call$0.01
Success—
StatusUnknown
How this service works
OpenAI-compatible LLM gateway at $0.005/call — change base_url, pay in USDC. Plus pay-per-call market data: multi-oracle price consensus, sentiment, forex, equities, commodities, Brazil macro (BCB/B3) and crypto. No API keys, no accounts. USDC on Base, Solana and Algorand via x402.
Output
Returns a JSON object indicating whether the CNPJ or CPF is structurally valid based on modulo-11 check digits, the correctly formatted version of the identifier, and for CNPJs whether the branch code indicates a headquarters (0001). Does not confirm active registration status with Receita Federal.
Example use cases
Pre-payment CNPJ fraud check
“Before I process this invoice, validate the supplier's CNPJ — 45.678.901/0001-23 — to make sure it's not fabricated or mistyped.”
CPF validation in onboarding flow
“I'm onboarding a new Brazilian user who entered CPF 123.456.789-09 — can you check if that CPF passes the modulo-11 check digits and is properly formatted?”
Classify CNPJ branch vs headquarters
“Check this CNPJ — 07.526.557/0002-44 — is it valid, and is it a subsidiary branch rather than the main headquarters?”
Technical details
Endpoint
GEThttps://markets.losbeto.xyz/br-doc?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need fast, zero-latency, offline structural validation of Brazilian CPF or CNPJ numbers before submitting them to downstream workflows, payment systems, or registries. It is ideal for catching typos and fabricated identifiers without incurring the latency or cost of a live Receita Federal API call. Prefer this over live registry lookups when all you need to confirm is that the number is mathematically well-formed.
Side effects
- Invalid or malformed doc parameter returns a validation failure response
- Non-numeric or wrongly-lengthed input may return an error or invalid result
- Payment failure via x402 (USDC on Base/Solana/Algorand) results in HTTP 402 and no response
- The endpoint does not check live Receita Federal registry — only structural validity is confirmed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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