API documentation

Our APIs

Our dedicated developers are continuously working on the (further) development of existing and new Application Programming Interfaces (APIs), which enable you to easily access our unique data. This allows you to add value to internal systems for optimizing processes or to create new functionalities on applications and platforms that are of value to your end users.  

Below you will find an overview of the wide range of APIs that can be used immediately. If the desired application is not available our developers are ready to develop a custom solution.

An overview of our APIs


DescriptionSolution catogory
International Address Checker API2Provides you with address verification for 197 countries. By entering address data you can retrieve a list of the most suitable addresses and generate a mailability score.

Address Intelligence  

Urban intelligence

Autocomplete International Address Checker API1Helps your customer fill in his / her address details online. After entering a few characters (eg street name), this application automatically fills in the rest. Autocomplete is available for addresses in the Netherlands, Belgium and Luxembourg.Address Intelligence
International Email Checker API1Validates email addresses worldwide. Checks whether the email address provided by the customer exists, if the spelling is correct and whether it can receive digital mail. It Also checks whether it is a business or private email address and if it has been used for fraudulent activities.Address Intelligence
International Phone Checker API1Checks whether your customer has provided his / her correct telephone number. After entering the telephone number, it is checked whether it has been issued, if the number of digits is correct and if the spelling is correct.Address Intelligence
Company API4Gives you unlimited access to our database with company data. You can retrieve company data by entering: Chamber of Commerce number, company name, address or telephone number.Address Intelligence
Consumatrix Profiles API2Indicates the profile associated with the entered address. Retrieve a list of all available consumer profiles by entering address information. Or retrieve addresses by entering the city and profile.Address Intelligence
Real Estate Data API1Gives you access to our real estate data database in which we have consolidated all available information about a real estate object. Historical price data, the WOZ value, architectural details, and the energy label are included. You can retrieve real estate data by entering postal code and house number.Real Estate Intelligence
Automated Valuation Model (AVM) API 1Generates an estimated house value based on the property’s characteristics. Generate a house value report yourself by entering a few object characteristics.Real Estate Intelligence
Avix Lead Tool API1Allows you to offer a free house value report to website visitors. The report consists of a house value indication, reference homes and additional home features. Generate an estimated house value based on the property features.Real Estate Intelligence
Buurtinformatie API (Neighbourhood Information API)1Provides you with detailed neighborhood data such as the number of households, the distribution of men and women, the average energy consumption, the distance to the nearest supermarket etc. You can retrieve neighborhood information by entering a postal code.

Real Estate Intelligence 


Urban Intelligence

Kadastrale Kaart API
(Cadastral Map API)

1Provides you with a cadastral map. These data are always up to date and legally valid as an appraisal appendix. The cadastral map can be retrieved by entering the postal code, house number, the file format of the map and the desired dimensions in pixels.
Real Estate Intelligence
BAG Uittreksel API
(BAG Data API)

1Provides you with data from the BAG after entering the postal code and house number. This concerns the number designation and matters such as the status of the property, purpose of use, surface area and year of construction.
Real Estate Intelligence
WOZ Waarde API
(WOZ Value API)
1Provides you with all WOZ values ​​since 2015 after entering the postal code and house number.Real Estate Intelligence
Woonlasten API
(Housing Costs API)
1Indicates the housing costs that apply per municipality in the Netherlands after entering the postal code and house number.Real Estate Intelligence
Referentiewoning API
(Reference House API)

Gives the last transaction of the property after entering the postal code and house number.
In addition, the API generates 50 to 100 reference houses within a certain radius of the entered address.
Generate a list of reference houses or retrieve a transaction of a reference object by entering postal code, house number .

Real Estate Intelligence