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Quick start

One GET, one JSON. The request below needs no key (20 calls a day per address); a free key lifts that to 100 calls a month and 2 requests a second.

Janolab Studio LLC makes software. It is not a law firm, an accounting firm or a tax, financial or legal adviser. Answers come from public registries and checksums; you check the result, make the decision (the tax treatment of a supply, the acceptance of a VAT number or an IBAN) and remain responsible for how you use it.

1. Validate a VAT number

Country and number can be sent separately or as one string with the prefix; spaces, dots and dashes are removed; GR becomes EL. The answer says whether VIES answered live or whether a dated cached answer was served because the member state was down.

curl — no key needed for the first 20 calls a day
curl "https://veriport.io/api/v1/vat/validate?country=DE&number=136695976"
200 OK
{
  "valid": true,
  "countryCode": "DE",
  "vatNumber": "136695976",
  "full": "DE136695976",
  "structure": {
    "valid": true,
    "checksum": "passed",
    "expected": "9 digits"
  },
  "name": null,
  "address": null,
  "requestDate": "2026-10-24",
  "consultationNumber": null,
  "source": {
    "kind": "live",
    "checkedAt": "2026-10-24T09:14:03Z",
    "cacheAgeSeconds": 0,
    "stale": false
  },
  "upstream": {
    "service": "vies",
    "transport": "rest",
    "status": "ok",
    "memberStateAvailable": true
  },
  "tableVersion": null
}

2. Read a VAT rate

Standard, reduced, super-reduced and parking rates, with category hints (digital services, e-books, food, accommodation…), the day the row was verified and the sources it was read from.

curl — VAT rates for one country
curl "https://veriport.io/api/v1/vat/rates/FR"

3. Check an IBAN

Characters, country, length, the mod 97-10 check digits and the country’s BBAN pattern from the SWIFT registry, plus the bank and branch identifiers and the SEPA flag. An invalid IBAN is a 200 with valid: false and the list of failed checks, so your form can say why.

curl — IBAN
curl "https://veriport.io/api/v1/iban/validate?iban=DE89%203704%200044%200532%200130%2000"

4. Get a key, add the consultation number

Sign up with an e-mail at /signup, click the confirmation link (valid 7 days), copy the key: it is shown once and stored hashed. With prepaid credits or the monthly plan, add requester=<your own VAT number> and VIES issues a consultation number, the evidence a tax audit accepts for the zero-rating of an intra-EU supply.

curl — with your key and a consultation number
curl -H "Authorization: Bearer vp_live_YOUR_KEY" \
  "https://veriport.io/api/v1/vat/validate?country=DE&number=136695976&requester=FR40303265045"

5. Validate an e-invoice, then create one

Send a received XRechnung, Peppol BIS or Factur-X file to POST /einvoice/validate (no key needed for the first checks of the day): the XML schema and the official CEN, XRechnung and Peppol rules run on it and every finding comes back with its published rule id. With a key, POST /einvoice/create turns your invoice JSON into the file itself and checks it before returning it; see the e-invoice API.

curl — check an e-invoice (raw XML or PDF body)
curl -X POST "https://veriport.io/api/v1/einvoice/validate" -H "Content-Type: application/xml" --data-binary @invoice.xml

Next

The reference pages list every parameter, response field and error per endpoint, generated from the same OpenAPI 3.1 document that is served at /openapi.json. The guides cover the questions behind the calls: what to do when VIES is down, which rate applies to a digital service in each country, how the IBAN check digits work.

Questions

Do I need a key to try it?
No. 20 calls a day per address need no key. A free key (e-mail confirmation, no card) gives 100 calls a month.
Is this an official service?
No. Veriport is operated by Janolab Studio LLC; it calls the European Commission’s VIES service for VAT numbers and maintains its own dated, sourced tables for rates and IBAN structures. It is not affiliated with the Commission, SWIFT or any tax administration.
What does a call cost?
Free up to the monthly allowance; then $9 for 2,000 calls, $29 for 10,000 (valid 12 months), or $15 a month for 5,000 calls with the bulk endpoint. Fair use; public availability record on every tier.

100 calls a month, no card, key shown once.

Get a free key

Sources