The nearest thing I can think of is Scrapy (https://scrapy.org/ https://scrapy.org/). For airfare, I think there's already a few players in the "this flight go

The nearest thing I can think of is Scrapy (https://scrapy.org/ https://scrapy.org/). For airfare, I think there's already a few players in the "this flight got cheaper" space (Kayak and Hopper come to mind), but they don't have data on some airlines (because of the airlines' ToS IIRC).