Check a Czech company by API: ARES

ARES (Ministry of Finance) · read from the national register · checked 11 November 2026

The official route

ARES is the Czech Ministry of Finance's register of economic entities. Its REST API needs no key. The base is https://ares.gov.cz/ekonomicke-subjekty-v-be/rest, with /ekonomicke-subjekty/{ico} for one company by its IČO and /ekonomicke-subjekty/vyhledat for name search.

The operating conditions on the ministry's page (updated 2026-08-31, read 2026-11-09) say anyone may use the services if they respect those conditions. There is no licence text and no Creative Commons licence. The conditions say nothing on reuse or commercial use. They do mention other portals that publish the data with a reference to ARES, and say the ministry is not responsible for how those use it. Access may be limited for users who send more than 500 requests a minute, run many requests at once or repeat the same ones. The page also says ARES data is informative only and cannot serve as evidence in court.

Where it gets hard

ARES has no status field. You derive it from the date of cessation, from "v likvidaci" in the registered name, and from whether the Insolvency Register holds the company.
An Insolvency Register entry tells you proceedings are on record. It does not tell you the stage. One company we checked still has an entry after an approved reorganisation.
A company that ceased to exist drops out of the main endpoint. A second view gives its date of cessation and no name.
Companies deleted before 2012 are in neither view.
Board members are in a separate public-register view, together with dates of birth and home addresses.

One call

{"query": "Škoda Auto a.s.", "country": "CZ"}

The request goes to POST https://api.boscolabs.dev/v1/counterparty-check. An IČO is exact: IČO 27074358 is Asseco Central Europe, a.s.

Check	Source for this country
Register status	ARES, read live, status derived as above
Insolvency	ARES: in liquidation, or the Insolvency Register holds the company
People on sanctions lists	Not checked: officers are not read
Recent accounts	ESEF annual reports, listed companies only
VAT number	VIES
Company on sanctions lists	OFAC, UN, UK, EU and US export lists
LEI status	GLEIF

$0.05 per company checked, empty and failed calls are free.

What we do not cover

The stage of an insolvency case.
Officers and owners. We decided on 2026-11-09 not to read them.
Natural persons in business: a lookup of their number fails without a charge.
Companies deleted before 2012.

Sources

ARES operating conditions (Ministry of Finance)
ARES REST API base: https://ares.gov.cz/ekonomicke-subjekty-v-be/rest

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