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Netherlands VAT Number Checksum Validator
x402
Netherlands VAT Number Checksum Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-02).
Validates whether a Dutch (NL) VAT number has a correct checksum, without performing a live registry lookup.
Price / call$0.008
Success—
StatusUnknown
How this service works
Call when an agent needs whether a NL VAT checksum is valid. No registry lookup. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/check-vat-nl first.
Output
Returns whether the provided NL VAT number passes the Dutch checksum algorithm (a mathematical validity check). Does not confirm the number is registered with the Dutch tax authority — only that the format and checksum digits are correct.
Example use cases
E-commerce checkout VAT validation
“Before we process this Dutch business customer's order, can you verify that their VAT number NL854695370B01 passes the NL checksum — just a format check, no registry call?”
Bulk invoice data quality check
“I've got a Dutch supplier's VAT number NL002065538B01 on an invoice — can you confirm the checksum is mathematically valid before I add it to our accounting system?”
Onboarding form validation
“A new Netherlands-based vendor filled out our onboarding form with VAT number NL823458272B01 — does it have a valid checksum so I know it's not a typo?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-vat-nl?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, cheap, offline checksum validation of a Dutch VAT number without hitting the official VIES or Dutch tax registry. Ideal for form validation, data quality checks, and pre-filtering before expensive registry lookups. Always try the free sandbox endpoint POST /v1/sandbox/check-vat-nl first; pay only when the sandbox is unavailable or unsuitable.
Side effects
- Input VAT string is empty or exceeds length limits — returns validation error
- Malformed input object missing the value field — returns schema error
- VAT number for a different country passed in — checksum may produce unexpected results
- Network or payment processing failure — HTTP 402 or 5xx 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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