About this API
KVK (Kamer van Koophandel) runs the Dutch trade register (Handelsregister) — the equivalent of the KRS. The API returns data for all Dutch companies by KVK number. It closes a gap: until now the catalog had only the CBS statistics office for the Netherlands, not a company register.
Frequently asked questions
Do I need an API key?
Yes — it requires registration and an API key. The test environment is free; production is paid per call.
What data does this API return?
A Dutch company's data by KVK number — name, address, legal form, branches and status.
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?
KVK (Kamer van Koophandel, Netherlands). Documentation: developers.kvk.nl.