I am using a tools uploadcare from (uploadcare.com)
I read the documentation but I cannot find how can we autostore
when using javascript api to after upload a file.
Is autostore feature only available on widget and REST api?
Uploadcare's autostore
is covered here
Basically you need to enable autostore
in project's settings (it's on by default) and on the page where you use upload dialog. So you can have several pages that enable automatic storing and some that don't.