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

Given a postcode or lat/lng combination and your own list of postcodes returns the postcodes ordered from near to far.


An array of 4PPs(e.g: [1000, 1011, 1012])


targetPostalCodes

The 4PP(e.g: 1000), if both postalCode and lat/lng combination is given the lat/lng from the postalCode will be used.


postalCode

Dutch fourppOrSixpp

latitude

longitude

The order in which to return the results:
  distance (default)
  **input (keeps the input ordering)
  **postalcode (order by the postalcode)

  ** not yet supported


orderBy

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


maxResults

algorithm: Choose an algorithm. road to calculate the actual traveling distance and time over actual roads, or straight to obtain the distance in a straight line.
Any subscription allows access to the straight line distance, however the road algorithm uses the drive time matrix (shortest route) that requires a ’development agency’ or higher subscription level when used through the API.
For trial purposes, a range of postcodes is allowed with any subscription level: 1000..1098, 1100..1108 (Amsterdam), 3000..3089 (Rotterdam), 5600..5658 (Eindhoven).


algorithm

A string containing a comma-separated list of postcodes (e.g., "1000,1011,1012").


Return near postcodes from a postcode or lat/lng combination.