
Validate EU and UK VAT numbers with country formats, checksums, and VIES status.
Stanza VAT Validator API is a free Finance API that requires apiKey authentication, is served over HTTPS and does not support CORS, so it should be called from a server.
Validate European Union (EU-27) and United Kingdom (UK) VAT identification numbers in sub-1ms with offline checksum formulas and instant 2026 VAT tax rate lookups.
Details from stanzaapi.com.

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The Stanza VAT Validator API is provided by StanzaAPI Developer Platform (stanzaapi.com). Validate European Union (EU-27) and United Kingdom (UK) VAT identification numbers in sub-1ms with offline checksum formulas and instant 2026 VAT tax rate lookups.
Yes. The Stanza VAT Validator API is listed in the Finance category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The Stanza VAT Validator API uses apiKey authentication, so you need to register for credentials before making requests.
Not directly. The Stanza VAT Validator API does not allow CORS, so call it from a server, serverless function or proxy instead of front-end JavaScript.
Yes. The Stanza VAT Validator API is served over HTTPS, so it's safe to use in production.