This document offers you technical information on the Valdit Dutch Addresses REST API. Our API offers Advanced Validation of Dutch Addresses.

Target Audience

This document is written for Software Architects and Developers that are familiar with using RESTful web services, HTTP/1.1, OAuth 2.0 and JSON serialization formats.

Getting Started

The fastest way to learn to use an API is a ‘Hello World’ example. You will find such an example, showing you how to perform your first VAT Number validation, in chapter 4: ’Getting Started: Make your first call’.

Contact us

Do you have a technical question on using the API? Interested in using one of our client libraries? Suggestions for improving the API or this Technical Documentation? Contact our development team directly at We value your input!