This is the Authorization key. You have to add it as a GET parameter.
Your auth key can be found on the [CMS](https://www.pro6pp.nl/cms).


authKey

This will give autocomplete suggestions for Belgian settlements.
Settlements will be returned based on postnames, postnames are (unofficial) cities within a settlement, e.g: Laken is a postname in Brussel.


When specified, this ISO 639-1 language code determines in which language the accompanied input filters will be applied. It does not affect the output languages. When unspecified, input filters are applied to all languages.


languageCode

The address's settlement (city, town, village, or hamlet)


settlement

The address's postal code which can be up to four digits long


postalCode

Belgium postalCode

The amount of results returned, a number between 0 and 999.


maxResults

The page to return, the variables for the next/previous pages can be found in the results Link header.
