CRO (Companies Registration Office)

CRO — Irish company register (OpenServices)

Ireland's official company register (Companies Registration Office), exposed via CRO OpenServices. Data by company number. Requires free registration.

Official source Ireland registration REST/JSON
GET services.cro.ie/cws/company/{number}/{company_bus_ind}?format=json

Verified 2026-08

See documentation →

About this API

CRO (Companies Registration Office) is Ireland's equivalent of the KRS — the register of all Irish companies and sole traders. The CRO OpenServices API returns company and filing data by number. It requires free registration (a CustomerKey sent with the request).

Frequently asked questions

Do I need an API key?

Yes — it requires free registration (a CustomerKey sent with the request).

What data does this API return?

An Irish company's data by number — name, status, address, type and filing history.

Can this API be called directly from a browser?

Not easily — key/registration-based authentication requires a server-side call and is not suitable for frontend code visible to visitors (which is why there is no live "Try it" button here).

Who runs this API?

CRO (Companies Registration Office, Ireland). Documentation: services.cro.ie.

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