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Agent402 UK — CPF Validator
x402
Agent402 UK — CPF Validator is a paid API for AI agents from agent402.co.uk, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Validates a Brazilian CPF tax number by checking format and mod-11 checksum, returning a structured pass/fail result.
Price / call$0.001
Success—
StatusUnknown
How this service works
Don't burn tokens on deterministic work. Go/no-go jobs first: payout preflight, text firewall (PII/secrets), budget check — then rails, calendars, finmath. x402 USDC on Base. UK + global. agent402.co.uk — not agent402.tools. $0.001–$0.002 USDC on Base. No API keys.
Output
Returns a JSON object with a 'valid' boolean (overall validity) and 'valid_checksum' boolean (whether the mod-11 check digit is correct). Allows the agent to gate downstream workflows on confirmed CPF integrity.
Example use cases
Pre-payout recipient validation
“Before we send a payout to this Brazilian supplier, check that their CPF '071.634.280-37' is valid and the checksum is correct.”
Onboarding KYC preflight
“We're onboarding a new Brazilian customer who gave us CPF '529.982.247-25' — can you verify it's a properly formatted, checksum-valid CPF before we proceed?”
Bulk data cleanup check
“I have a CPF from an old record — '000.000.000-00' — can you tell me if it passes the CPF checksum so I know whether it's worth keeping?”
Technical details
Endpoint
POSThttps://agent402.co.uk/v1/validate/cpfWhen to prefer
Use this endpoint when you need a fast, deterministic, offline CPF validation with checksum verification before executing a Brazilian payment, onboarding a user, or cleaning data — without burning LLM tokens on rule-based logic. Prefer it over asking an LLM to validate CPF, which is error-prone and wasteful for a fixed algorithm.
Side effects
- Malformed input (non-string or missing 'cpf' field) may return an error or invalid result
- CPFs with all-zero digits pass formatting but fail checksum, returned as invalid
- Network or payment-related failures if USDC payment via x402 is not properly handled
- Edge cases like CPFs with all identical digits (e.g. 111.111.111-11) are algorithmically invalid and should be flagged as such
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| cpf | string | CPF, punctuation ok |
Output
Schema · Response
{
"type": "json",
"example": {
"valid": true,
"valid_checksum": true
}
}Tags
x402
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