Can one API cover both UK and Irish companies?

Yes. Prometiam exposes Companies House (UK) and the CRO (Ireland) under one schema and one Bearer key. The same endpoints accept ?country=GB and ?country=IE, so a UK fintech onboarding an Irish subsidiary verifies both without a second integration or contract.

What Irish company data is available?

From the CRO Open Data Portal (CC BY 4.0): company status, registered address, Eircode, NACE code, incorporation and dissolution dates, for ~817K Irish companies. Ireland is company-level — directors/officers and beneficial ownership (RBO) are not yet included (Irish RBO public access is legally restricted).

Does the UK side include beneficial ownership?

Yes — UK Companies House data includes the PSC (Persons with Significant Control) register, so UK beneficial-ownership data is available. Irish UBO is not, due to the restricted RBO. The British Isles bundle is explicit about which country has which.

UK + Ireland (British Isles) KYB API — one key, two registries

This guide explains how Prometiam exposes UK Companies House and the Irish CRO under one REST API and one Bearer key, so post-Brexit cross-border verification works with a single country parameter rather than two integrations.

Why the British Isles is one verification problem

Since Brexit, UK fintechs, payment providers and lenders increasingly deal with Dublin-incorporated, EU-passported counterparties — many UK groups hold an Irish entity to keep an EU footprint. Instead of stitching together a manual CRO search plus a second API, you add the country=IE parameter to the same endpoint you already use for the UK.

What each side covers

United Kingdom (Companies House) — 7.6M+ companies, daily bulk and delta updates, PSC beneficial-ownership data, officers and filing events.
Ireland (CRO) — roughly 817K companies from the CRO Open Data Portal (CC BY 4.0): company status, registered address, Eircode, NACE code, incorporation and dissolution dates. Ireland is company-level only — no directors or Irish UBO, because the RBO register's public access is legally restricted.

One key, both countries

The same endpoints, response shape and key work for both registries — you switch the country parameter between GB and IE. Beneficial ownership is UK PSC only. Pricing includes both countries in every tier with no per-country fee: Free (1,000 calls/month), Starter (EUR 9.99/mo), Professional (EUR 29.99/mo, with sanctions and US export-control screening) and Scale (EUR 99.99/mo).

Frequently asked questions

Can one API cover both UK and Irish companies?: Yes. Prometiam exposes Companies House (UK) and the CRO (Ireland) under one schema and one Bearer key. The same endpoints accept ?country=GB and ?country=IE, so a UK fintech onboarding an Irish subsidiary verifies both without a second integration or contract.
What Irish company data is available?: From the CRO Open Data Portal (CC BY 4.0): company status, registered address, Eircode, NACE code, incorporation and dissolution dates, for ~817K Irish companies. Ireland is company-level — directors/officers and beneficial ownership (RBO) are not yet included (Irish RBO public access is legally restricted).
Does the UK side include beneficial ownership?: Yes — UK Companies House data includes the PSC (Persons with Significant Control) register, so UK beneficial-ownership data is available. Irish UBO is not, due to the restricted RBO. The British Isles bundle is explicit about which country has which.