In brief

The Register of Economic Subjects (RES) is kept by the Czech Statistical Office and published as open data.
Czech companies come back from the same endpoints in the same shape as Slovak ones; the country or countries parameter selects them.
Slovak data is the default, so existing integrations see no change. Czech data is opt-in.

Publisher: Czech Statistical Office (ČSÚ)
Coverage: about 3.5 million Czech subjects
Refresh: ČSÚ publishes a new file about twice a month; we check daily at 6:00 UTC
Endpoints: /organizations?countries=CZ, /organizations/{cin}?country=CZ

What the register holds

Name, company ID (IČO), legal form, dates of establishment and termination.
Registered address: street, municipality, postal code.
CZ-NACE activity classification.

RES is a statistical register, not a commercial one. It carries no officers or shareholders — in Czechia those are in the public register and ARES. For identifying a company, filling in invoice details and confirming it exists, it is enough.

Search across both countries

curl "https://api.apino.sk/api/v1/organizations?name=skoda&countries=SK,CZ" \
  -H "Authorization: Bearer $APINO_KEY"

Sources

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.Company changesDaily monitoring of Slovak companies: address, officers, VAT, tax reliability, financial statements and e-invoicing. By cursor API, webhook or email.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.