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EU VAT number validation API

Check whether an EU VAT number is valid and active, and get the registered name and address where the member state publishes them.

B2B sales across EU borders depend on a valid VAT number. This endpoint checks a number with the country prefix (DK10150817, DE123456789) and returns whether it is valid, plus the registered name and address when the country publishes them.

Member-state backends are sometimes slow or unavailable. The endpoint retries temporary errors, and if the source is down you get an error and are not charged.

The calls

Each call returns 402 with the price until a payment is attached; an x402 client pays and retries automatically. Calls that fail are not charged. See Get started and the guide for bots and agents for code.

eu-vat-validate $0.003 per call

Check whether an EU VAT number is valid and active.

curl -i "https://api.ambolt.dev/v1/eu-vat-validate?vat=DK10150817"

{
  "vat": "DK10150817",
  "valid": true,
  "name": "Erhvervsstyrelsen",
  "address": "Langelinie Allé 17, 2100 København Ø",
  "checkedAt": "2026-10-02T21:35:47.597Z",
  "source": "Source: European Commission VIES. Informational; not a substitute for the official confirmation needed for tax purposes."
}

Questions

Is the result a legal proof?

No. It is informational. For tax purposes, keep the official confirmation you are required to keep.

Why do some countries return no name or address?

Not every member state publishes them.

What about Greece and Northern Ireland?

Use the prefixes EL and XI.

Use it from an AI agent

Every call is also an MCP tool: add https://api.ambolt.dev/mcp to your agent's server list.