Interfacing Blynk with my web app

Hello all,
I’m new in this community and thanks in advance for all the answers. Maybe I’m doing a stupid question but I tried to find an answer on this community and google but nothing clear.
I would like to connect my web app directly to Blynk( I think Server installed locally can give me more control) to read and controll all. I saw that there are the API to use with Blynk in cloud, but for me they are not enough, I need more control, for example querying all the data and not like the api to receive a csv, for example.
Thanks for any suggestion.

Regards
Marco