VAT Number Validator

What it does

VAT Number Validator checks up to 10 VAT numbers in one request and returns a per-item validation result. Send an array of VAT strings in vat_numbers; the response includes each vat plus a boolean valid flag, and an error field when lookup fails for that item.

Use it when you need to verify supplier tax IDs during onboarding, clean CRM records before invoicing, or flag entries that should be reviewed by finance. Because the endpoint works in batch, you can validate a small list of records without building your own loop around single-item checks.

The response is straightforward to consume: iterate over the returned data array and inspect valid for each VAT number. If a lookup cannot be completed, the item still comes back with the original vat and an explanatory error value so you can separate invalid numbers from transient lookup issues.

VAT Number Validator is a good fit anywhere you need lightweight tax-ID validation as part of a backend workflow, import job, or form review step.