In brief

Every night we compare the registers with the day before and record the changes in one feed.
You hold the list of companies (the cursor API) or we do (a watchlist with a webhook or an email).
It covers the company register, the Financial Administration's lists, the Register of Financial Statements and the Peppol network.
When nothing changed, nothing is sent.

Sources: RPO, the Slovak Financial Administration, the Register of Financial Statements, Peppol, Czech VAT lists
Detection: daily, after each source's nightly sync
Delivery: webhooks at 5:30 UTC, the email digest at 6:00 UTC, the API at any time
Endpoints: /changes (since_id cursor, up to 100 company IDs), /changes/export (a day in one file)

What is tracked

Register: name, address, legal form, activities, officers, shareholders, share capital, establishment and termination.
VAT: registration, erasure, grounds for cancellation, the Czech unreliable payer status.
Tax: a change of the tax reliability index.
Financial statements: a new filing, and a statement that has not arrived.
E-invoicing: a company registering on the Peppol network.

Three ways to receive them

Cursor API: send a list of company IDs and since_id, get everything new and a next_cursor for the next call. No change is lost or repeated.
Webhook: a signed request (HMAC over a timestamp) to your endpoint, retried on failure.
Email: a daily digest for people who will never call an API — an accountant with clients, for one.

What is new since the last call

curl "https://api.apino.sk/api/v1/changes?cins=44197519,35757442&since_id=8800" \
  -H "Authorization: Bearer $APINO_KEY"

{
  "data": [
    {
      "id": 8977,
      "identifier": "35757442",
      "change_type": "vat_registration",
      "old_value": "registered",
      "new_value": "deregistered",
      "sync_date": "2026-08-29",
      "source": "tax"
    }
  ],
  "has_more": false,
  "next_cursor": 8977
}

Try it free, no card needed

Sources

Apino API documentation

Other data

Register of Legal Entities (RPO)Slovak commercial and trade register data from the Register of Legal Entities: search, company detail, officers and change history. Synced daily, register defects corrected.Slovak VAT payersVerify a Slovak VAT payer by company ID, tax number or VAT ID from the Financial Administration's lists: registered, erased, and those with grounds for cancellation. Read daily.Tax reliability indexThe tax reliability index from the Slovak Financial Administration's public list, by company ID or tax number, with rating changes tracked daily.Financial statements (RÚZ)Filed financial statements of Slovak companies from the Register of Financial Statements: period, kind and filing date. Daily, with an alert on a new filing and on a missing one.E-invoicing (Peppol)Find out by company ID whether a Slovak company can receive an electronic invoice over Peppol. Checked against the network itself, not the directory; the whole register is walked every night.Czech company register (RES)Czech companies from the Register of Economic Subjects (Czech Statistical Office), in the same API and shape as Slovak ones: search by name and company ID, address, legal form, status.Czech VAT registerVerify a Czech VAT payer by company ID or tax number against the Czech Ministry of Finance's register: payer status, unreliable payer and published bank accounts. Asked live.