If you're new to Vingd, the best place to start is the newspapers site demo.
This demo is also somewhat of a reference implementation, with typical scenarios solved (e.g. popup purchase, voucher rewarding, etc).
Full source code is available.
For a step-by-step interactive demo, you should take a look at the simple php demo.
Overview and introduction to Vingd API is best given in the php manual (html).
Full API code archives can be found below, together with html/pdf docs.
For all additional queries, please feel free to reach us at ...@vingd.com