I'm using a dfa connector and now i have to use a DFA ad Variabile (specifically the Campaigns variable) in a API 1.4 or newer, I didn't find a documentation of it, anyone know if is it possibile? how?
You can get it through the Analytics eVar that receives DFA campaign attribute, impressions, and clicks data. Typically, this is the Tracking Code eVar ( s.campaign ), but you can choosen another eVar, you can use that. API end-points details - API Reference
I would suggest to use Advertising Analytics to get DFA data in workspace. It's pretty sleek. Only caveat is Advertising Analytics is available for Adobe Analytics Select , Prime , and Ultimate SKUs only.