KVK

KVK's API provides authoritative Dutch business data with excellent documentation and simple API key authentication.

The RESTful API covers company searches, business profiles, and registration data comprehensively. JSON output is well-structured, with sandbox environments containing test data. However, it requires a KVK subscription and is specific to Netherlands business data.

The API is limited to basic company information, not including detailed financial data. It's ideal for business verification, CRM integration, and compliance checking in the Dutch market, offering official Chamber of Commerce data.