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Slovenian VAT Number Checksum Validator
x402
Slovenian VAT Number Checksum Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-02).
Validates the checksum of a Slovenian (SI) VAT number without performing a live registry or VIES lookup
Price / call$0.009
Success—
StatusUnknown
How this service works
Call when an agent needs whether a SI VAT checksum is valid. No registry lookup. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/check-vat-si first.
Output
A response indicating whether the provided Slovenian VAT number passes its checksum algorithm — returns a validity boolean or equivalent indicator. No external registry or VIES database is consulted; this is a pure algorithmic checksum check.
Example use cases
Pre-submission invoice VAT validation
“Before I send this invoice to our Slovenian supplier, can you verify that their VAT number SI96888345 has a valid checksum so I don't get it rejected?”
Bulk onboarding data quality check
“I'm onboarding a new Slovenian vendor and want to make sure the VAT number they gave us — SI15012557 — is structurally correct before we add it to our system. Can you validate the checksum?”
Tax form audit sanity check
“We're auditing some old tax records and need to quickly verify whether SI72996868 is a legitimately formatted Slovenian VAT number based on its checksum alone.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-vat-si?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, offline, purely algorithmic checksum validation of a Slovenian SI-prefix VAT number and do not need a live registry lookup to confirm the number is actually registered. It is cheaper and faster than VIES-based lookups and works without network access to external tax registries. Prefer the unpaid sandbox endpoint `/v1/sandbox/check-vat-si` for testing before committing to paid calls.
Side effects
- Empty or missing value field returns a validation error
- VAT number string exceeds maxLength of 20000 characters
- Malformed request body returns HTTP 400
- Payment not included or insufficient USDC triggers HTTP 402
- Non-SI VAT numbers (e.g. DE, FR prefix) may return invalid or unexpected results
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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