📊 Data Sources

KVK API

Paid endpoints (€0.02 per request):

• basisprofiel - Basic company profile
• vestigingsprofiel - Branch office profile

Free endpoint:

• zoeken - Free for detecting changes in names and addresses. Deregistrations can use this exclusively so they are processed free.

KVK Mutatieservice

Signal polling:

• Polling schedule: 4-week lookback period, 1-week intervals
• Processing: mutatieservice.php script

Signals tracked:

• SignaalNieuweInschrijving - New company registered with KVK
• SignaalBeeindiging_2025_01 - Company closed or bankrupt
• SignaalVoortzettingEnOverdracht_2025_01 - Company transferred (KVK number changed)
• SignaalRechtsvormwijziging - Legal form conversion (rechtsvorm change/omzetting)
• SignaalGewijzigdeInschrijving - Changes to company registration data. Will be used to track employee count and SBI code changes.
• SignaalGewijzigdeVestiging - Changes to establishment data. Not used for address tracking (too many updates - handled via cronjobs).

Handelsdata API

Commercial data provider:

• 3 API tokens
• 300,000 credits per month
• Update frequency: Daily

2miljoen

Company database:

• Update frequency: Monthly

BAG (Basisregistratie Adressen en Gebouwen)

Address geocoding and building classification:

• Gebruiksdoel - Building type classification describing where the registration functions
• Location validation and address data

IBIS

Bedrijventerreinen (business parks) data:

• Business parks referenced by BA (bedrijf_adres) under rin_nummer

OSM (OpenStreetMap)

Geographic and mapping data:

• Open-source geographic data

Postcode Gemeente

Postcode to municipality mapping:

• Links postal codes to municipalities (gemeentes)

Innovatie-ecosystemen lists

Innovation ecosystem data (ref_scrapers project):

• Netlists: awards, subsidies, networks, and more
• Scraper and matchfinder for ecosystem connections