The API key is required for all requests and must be included as a query parameter named `authKey`. You can obtain your API key from the [portal](/portal).


authKey

Deduce a complete or probable address based on incomplete, ambiguous, or partial input.

Validates that an address with the provided fields exists, and provides additional information about it.

In case you don't know all of the required parameters, you can use the [suggest](#tag/Suggest-BE) call to gather them first.

If the input identifies a unique address, all available information
about said address is returned. The default street, settlement,
province will be in the language spoken for that region. E.g: For
settlement, province and region in Flanders the default is Dutch.
In Wallonia the default language spoken is French, except for German
speaking parts where the default is German.

* To validate if an address has either a street number or a premise, query through the `streetNumberAndPremise` field.
* To validate if an address exists with a certain street number, use the `streetNumber` field.
* To validate if an address exists with a certain premise, use both the `streetNumber` and `premise` fields.
* Either `streetNumberAndPremise` or `streetNumber` is required. If both are given, only `streetNumber` is used.


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


postalCode

Belgium postalCode

street

The address's street number and premise (extension/addition).


streetNumberAndPremise

streetNumber

premise

The box identifier, excluding any prefixes such as "box", "bus", "bte", or "boîte". If provided, these prefixes will be automatically removed.


Autocomplete Belgium Parameters