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Croatian VAT Number Checksum Validator
x402
Croatian VAT Number Checksum Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-02).
Validates whether a Croatian (HR) VAT number passes the checksum algorithm, without performing a live registry lookup.
Price / call$0.004
Success—
StatusUnknown
How this service works
Call when an agent needs whether a HR VAT checksum is valid. No registry lookup. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/check-vat-hr first.
Output
Returns a boolean or structured result indicating whether the provided Croatian VAT number passes the HR VAT checksum algorithm. No external registry is contacted; only mathematical validity is confirmed.
Example use cases
Invoice validation before submission
“I'm about to send an invoice to a Croatian company and I have their VAT number HR85613832429 — can you verify the checksum is correct before I submit?”
Batch onboarding data quality check
“We just imported a Croatian supplier record with VAT number HR33392005961 — can you confirm the checksum is valid so I know the data isn't corrupted?”
E-commerce checkout tax ID verification
“A customer at checkout entered HR12345678901 as their Croatian VAT number — does it pass the checksum so I can decide whether to accept it?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-vat-hr?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, cheap, offline checksum-only validation of a Croatian (HR) VAT number and do not need to confirm the number is actually registered with the Croatian tax authority. Prefer the free sandbox endpoint /v1/sandbox/check-vat-hr for testing before paying.
Side effects
- Empty or missing value field returns an error
- Non-string or overly long input may be rejected
- Input that is not a recognizable HR VAT format may return invalid without detailed error
- Payment not included results in HTTP 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN. |
| value | string | Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar. |
| schema | — | JSON Schema document for schema-check SKUs. Omit it on string checks. |
Tags
x402
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