vatnode

Slovakia VAT API — Validate Slovakia VAT Numbers in Real Time

REST JSON endpoint for verifying Daň z pridanej hodnoty (DPH) numbers against the official EU VIES register, with national registry fallback where available and a VIES consultation number once you set your own VAT as requester in dashboard Settings.

Get a free API key Slovakia VAT number format

Why a Slovakia-Aware VAT API

In Slovakia, VAT is known as Daň z pridanej hodnoty (DPH) and the current standard rate is 23%. Every Slovakia VAT number starts with the prefix SK and follows a fixed structure issued by the Slovak tax authority. A generic VAT validator that ignores country-specific quirks will accept malformed input, miss the country's format rules, and fail to surface the local registry identifier that accountants and auditors actually need.

The vatnode API normalises DPH input, runs the official VIES check, and returns a single JSON shape with the consultation number, company data where published, and the current Slovakia VAT rates inline.

Slovakia VAT Number Format

Structure
SK + 10 digits
Regex pattern
^SK\d{10}$

Real Slovakia VAT numbers you can validate right now:

Validating Slovakia VAT Numbers — Code Examples

All three examples validate the same Slovakia VAT number SK2020310578. To receive a consultation number back, set your own VAT as requester once in dashboard Settings — then every call, including these, returns a consultation number automatically, with no extra parameters.

curl
curl 'https://api.vatnode.dev/v1/vat/SK2020310578' \
  -H "Authorization: Bearer YOUR_API_KEY"
Node.js (fetch)
const res = await fetch(
  'https://api.vatnode.dev/v1/vat/SK2020310578',
  { headers: { Authorization: `Bearer ${process.env.VATNODE_API_KEY}` } }
)
const data = await res.json()
console.log(data.valid, data.companyName, data.consultationNumber)
Python (httpx)
import os, httpx

r = httpx.get(
    "https://api.vatnode.dev/v1/vat/SK2020310578",
    headers={"Authorization": f"Bearer {os.environ['VATNODE_API_KEY']}"},
)
data = r.json()
print(data["valid"], data["companyName"], data["consultationNumber"])

What You Get Back

A successful response for a valid SlovakiaVAT number, once you've set your VAT as requester in dashboard Settings, looks like this:

{
  "valid": true,
  "vatId": "SK2020310578",
  "countryCode": "SK",
  "countryName": "Slovakia",
  "companyName": "Orange Slovensko a.s.",
  "consultationNumber": "WAPIAAAAXk7ZpY3o",
  "source": "VIES",
  "countryVat": {
    "currency": "EUR",
    "standardRate": 23,
    "reducedRates": [5,19],
    "superReducedRate": null,
    "parkingRate": null
  },
  "verifiedAt": "2026-05-19T08:14:22Z"
}

When the number is not registered, valid is false and company fields are null. The consultationNumber is the EU VIES requestIdentifier — the documented audit reference for reverse-charge "reasonable care" evidence. It is returned once you set your own VAT as requester in dashboard Settings; otherwise it is null.

Slovakia VAT Rates

vatnode returns the current Slovak DPH rates inline with every successful response. Today's rates (standard 23%, reduced 5%, 19%) are sourced from the European Commission TEDB feed, checked daily and updated on any change.

Rate typeValue
Standard23%
Reduced (1)5%
Reduced (2)19%

VIES vs National Fallback for Slovakia

For Slovakia, VIES is the sole authoritative source. vatnode does not run a national-registry fallback for this country today — when VIES is unavailable, the API surfaces a structured VIES_UNAVAILABLE error with retry guidance so you can degrade gracefully rather than silently accept unverified numbers.

Cached VIES responses (15-minute TTL on identical VAT IDs) absorb the majority of short outages transparently. For the full per-country fallback status, see the coverage matrix.

Slovakia VAT API — FAQ

Is the Slovakia VAT number the same as the company registration number?

No. The Slovak DPH number is issued for VAT purposes and is distinct from any local company registration number. vatnode returns the DPH number plus, when available, the registry identifier filed with the national company registry.

How fast is Slovakia VAT validation through vatnode?

Cached responses return in single-digit milliseconds. Live VIES lookups for Slovakia typically complete in under one second; a 15-minute Redis cache is applied to identical VAT IDs.

Does the API work for Slovak sole traders and small businesses?

Yes. If a Slovak sole trader or small business is registered for DPH and listed in VIES, vatnode validates the number and returns the same response shape as for corporate entities. The valid field is true regardless of legal form.

Does vatnode handle VIES outages for Slovakia?

vatnode caches recent VIES responses and surfaces a clear VIES_UNAVAILABLE error code with structured retry guidance. vatnode does not use a national validity fallback for Slovakia — only the VAT register itself can confirm a VAT registration, so during a VIES outage validation defers to the cached result or returns the error for safe handling.

What is the consultation number returned for checks in Slovakia?

The consultationNumber is the VIES requestIdentifier — a unique reference issued by the EU VIES service that proves the check was performed against the official EU register on a specific date. It is the EU's documented mechanism for "reasonable care" evidence under the reverse-charge rules and is returned once you set your own VAT as requester in dashboard Settings — including for Slovakia.

More on Slovakia

VAT APIs for Other EU Countries

See Also

Building an AI workflow? vatnode is also available to AI agents through the official MCP server — Claude, Cursor and ChatGPT can validate Slovakia VAT numbers and look up rates directly in chat.

Start Validating Slovakia VAT Numbers

100 validations per month on the free plan, no credit card required. REST JSON over HTTPS, VIES consultation number on qualified checks, EU-hosted by default.

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