@mx5_94 Hi, if you mean the "predefined set of products that can quickly be selected by name" that you can find under Settings -> Groups, then I can't find any such thing in their API. The thing called "groups" in the API is the live grouping of devices, which is a totally different thing.
Would you like to be able to change the current grouping of devices so that you can e.g. start a playlist/favourite on a particular set of speakers (by using checkboxes in our app), i.e. immediately make them a group if they are not already constituting a group?