# Brazilian CPF Digit Validator

> Brazilian CPF Digit Validator is a paid API for AI agents from agentum.lat, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Validates whether a Brazilian CPF number is mathematically valid by checking its verification digits, without accessing any personal data.

## Facts

- Endpoint: GET https://agentum.lat/validar-cpf
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/brazilian-cpf-digit-validator-7732aec8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eG3rR1n0O-b9R6bUxy_Gt

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 brazilian-cpf-digit-validator-7732aec8
```

Example prompt: Before I submit this registration, can you check if the CPF 123.456.789-09 is mathematically valid — just the digit check, no personal data lookup needed?

## When to prefer this

Use this endpoint when you need a fast, cheap, privacy-safe check that a Brazilian CPF number is structurally and mathematically valid before using it in a registration, payment, or form submission. Prefer this over CNPJ validators when dealing with individual taxpayers (CPF) rather than companies (CNPJ). It does not perform a government registry lookup, so use it for format/checksum validation only — not to verify identity or check if the CPF is registered to a specific person.

## Known failure modes

- CPF with fewer or more than 11 digits returns an invalid/error response
- Non-numeric characters in CPF that are not stripped may cause a rejection
- All-same-digit CPFs (e.g. 111.111.111-11) are mathematically invalid and will return invalid
- Network timeout or service unavailability returns an HTTP error
- Missing required 'cpf' query parameter returns a 400 or similar error

## How this service works

Validação de CPF brasileiro (dígito verificador) em tempo real — pra agente de IA confirmar que um CPF é matematicamente válido antes de usar num cadastro/pagamento. Não consulta dado pessoal de ninguém, só confirma o número.

## Output

Returns whether the given CPF number is mathematically valid according to the Brazilian CPF verification digit algorithm. The response indicates true/false validity without retrieving any personal information associated with the CPF.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "cpf"
     ],
     "properties": {
      "cpf": {
       "type": "string",
       "description": "CPF brasileiro, 11 dígitos, apenas números"
      }
     }
    }
   },
   "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/brazilian-cpf-digit-validator-7732aec8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentum.lat](https://www.zero.xyz/host/agentum.lat/llms.txt)