PostcodeNlApi provides an API to directly talk with the Postcode.nl API through the REST endpoint offered into your .NET (web)applications.
A .NET library for consuming the Dutch postcodeapi.nu post code database. More information can be found on http://www.postcodeapi.nu. Access tokens can also be requested here. To contribute to the specification of this API, join the guys over at their repo: https://github.com/apiwise/postcodeapi.