Automated amazon affiliate store - Still plausible?

I wanted to create a few niche amazon affiliate stores - but I want them completely automated. I was going to use Wordpress/Woocommerce and some sort of plugin that automatically imports products from the niches I'm targeting.

The problem is, the more research I do, the more it looks like there is no automated solution any longer. I'm pretty sure there USED to be, but I see plugins that use Chrome plugins to pull data and similar tactics.

Is there an automated solution to build a niche store and then keep it up to date with new products?

Or that just a pipedream now?