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Hi.
I'm no Kool dev, so maybe they come up with some special way to do it in the Dashboard.
That said, since Koolreport accepts Array as a datasource, what I can think off is that you can fetch your API from PHP, using curl or whatever method you prefer, convert the returned JSON to an array, an pass it direct into dataSource function.
The Dashboard Demo app have some array data sources examples to take a look.
Hope it helps.
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