The API is designed to be self explainatory. It consists of two main nodes:

• filter: where the various filter options can be seen.
  The filter is divided into two sections: active and inactive. all inactives has options to choose from.

• selection: where the filter results can be seen, along with the some accessories for this product.

The only required filter is “site”. add ?site=sv_SE to the URL and the API will let you know what is missing for the subsequent requests.
The only possible value for “site” at the moment is sv_SE, as the service is only available in Sweden/Swedish.