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Belgium VAT Checksum Validator
x402
Belgium VAT 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 whether a Belgian VAT number has a correct checksum using pure algorithmic verification, without performing any live registry lookup.
Price / call$0.009
Success—
StatusUnknown
How this service works
Call when an agent needs whether a BE VAT checksum is valid. No registry lookup. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/check-vat-be first.
Output
Returns a boolean or structured result indicating whether the provided Belgian VAT number passes the mod-97-based checksum algorithm, with no external registry or VIES lookup performed.
Example use cases
E-commerce checkout VAT validation
“Before we process this B2B order, can you verify that the Belgian VAT number BE0459029445 the customer entered is structurally valid — just the checksum, I don't need a live registry check right now.”
CRM data quality cleanup
“We're cleaning up our customer database — can you check whether the BE VAT number BE0408167729 passes the checksum validation so we know if it's worth investigating further?”
Invoice generation pre-flight check
“I'm about to generate an invoice for a Belgian company with VAT number BE0686158855 — can you run a quick checksum validation on that number before I send it out?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-vat-be?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, offline, purely algorithmic checksum validation of a Belgian VAT number and do not require confirmation that the company is actually registered. Prefer the free sandbox endpoint /v1/sandbox/check-vat-be first to avoid costs during development. Use this paid endpoint in production when the sandbox is unavailable or when you need reliable SLA guarantees.
Side effects
- Input string is empty or exceeds length limits — rejected with validation error
- Non-BE prefix or incorrect length VAT number may return invalid result or error
- Network or payment failure (x402 USDC payment not completed) results in 402 response
- Malformed JSON body returns 400 error
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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