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Polish REGON Number Validator
x402
Polish REGON Number Validator is a paid API for AI agents from x402-test.crewofthecaptain.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).
Validates the format and checksum of a Polish REGON business registry number via pay-per-call micropayment
Price / call$0.001
Success—
StatusUnknown
How this service works
Format and checksum validation for IBAN, EU VAT, Polish NIP/REGON/PESEL and email, pay-per-call via x402. Only $0.001 (0.1 cent) per check, paid via x402 in USDC on Base.
Output
Returns a JSON object with a 'valid' boolean, a 'type' field set to 'pl-regon', a human-readable 'reason' string (e.g. 'ok' or a description of why it failed), and a 'normalized' version of the REGON string if valid.
Example use cases
KYB onboarding for Polish company
“I'm onboarding a Polish supplier and their REGON is 590096454 — can you verify it's a valid REGON number before I proceed?”
E-commerce checkout REGON validation
“A customer entered 00000001 as their REGON at checkout — is that actually a valid Polish REGON number?”
Bulk vendor data cleanup
“I have a Polish vendor record with REGON 890513031 in our database — check if that's a properly formatted and checksummed REGON so I know whether to flag it for correction.”
Technical details
Endpoint
POSThttps://x402-test.crewofthecaptain.com/api/validate/pl-regon?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need lightweight, pay-per-use validation of Polish REGON numbers without signing up for a subscription API. It is ideal for agents handling Polish KYB (Know Your Business) workflows, e-commerce checkout validation, or data quality pipelines where REGON correctness is required. At $0.001 per call it is cost-effective for low-to-medium volume spot checks.
Side effects
- Invalid or malformed input string returns valid:false with a reason describing the checksum or format error
- Empty or missing 'value' field may return a 400-level error
- Payment failure via x402 (insufficient USDC balance) blocks the call with a 402 response
- Non-REGON strings (e.g. letters, wrong length) return valid:false with format error reason
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value | string |
Output
Schema · Response
{
"type": "json",
"example": {
"type": "pl-regon",
"valid": true,
"reason": "ok",
"normalized": "…"
}
}Tags
x402
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