Use case

Stay tax-compliant

Verify EU VAT numbers against VIES and invoice every customer in the correct currency — in a single call.

A B2B customer enters a VAT number

POST /v1/validate/vatGET /v1/currency

VIES-verified + correct currency

Book a demo View API docs

The flow

How the flow works

01POST /v1/validate/vat
VAT Validation
Verify the EU VAT number against VIES and return the registered company.
API details
02GET /v1/currency
Currency Exchange
Invoice the customer in the correct currency with live FX.
API details

See it

The flow in code

the flow · example

POST/v1/validate/vat200 OK

{
  "valid": true,
  "country_code": "DE",
  "company_name": "Google Germany GmbH"
}

GET/v1/currency200 OK

{
  "from": "USD",
  "to": "EUR",
  "rate": 0.9213,
  "result": 92.13
}

Try every endpoint in the playground

One integration

Piece it together, or ship one flow

A B2B buyer types a VAT number at checkout. Accept it blindly and you risk an invalid ID surfacing at audit; check it by hand and you’re pasting numbers into the VIES portal one at a time. Then the invoice still has to bill in the customer’s currency at a rate that isn’t weeks old.

Piece it together yourself

VAT check: Manual VIES portal lookups
Company data: Retype it from the portal
Currency: Stale FX, or none
Audit trail: Screenshots and spreadsheets

One Locanium flow

VAT check: Live VIES validation, one call
Company data: Returned with the response
Currency: Live rates, 168 currencies
Audit trail: Structured, logged responses

Why Locanium

Why teams build it on Locanium

VIES-connected

Real VAT validation against the EU VIES system, not a lookup table.

Company on file

Returns the registered company name and address for your invoice.

Correct currency

Live FX so every invoice bills in the right currency.

No manual lookups

Skip the VIES portal — it’s one API call.

27
EU states (VIES): 168
Currencies: <40ms
Median response

Ship it

Step-by-step guides for this flow

Validate EU VAT numbers and IBANs for a compliant B2B checkout

Read guide

FAQ

Questions developers ask

Is this real VIES validation?

Yes — VAT numbers are checked live against the EU VIES system across all 27 member states, not matched against a lookup table.

What comes back besides valid/invalid?

The registered company name and address on file at VIES, ready to drop straight onto the invoice.

What happens when VIES is down?

VIES has outages. The response tells you when the source is unavailable so you can retry, rather than silently passing an unchecked number.

Where do the exchange rates come from?

Live interbank feeds across 168 currencies, so every invoice bills in the correct currency at a current rate.

How is it priced?

One key covers VAT validation and currency — usage-based, one bill. Book a demo for volume pricing.