About Keepa
Keepa Requires a paid subscription to use it's API services
Keepa has Over 1700 million tracked amazon products, including customizable price history graphs. All can be accessed through it's application programming interface (API).
Keepa.com - Amazon Price Tracker
Follow the link and click Pricing Plans for more details

Install the Keepa Plugin for Bubble.io

It takes time and money to have a webscraper comb over amazon prices. Think of Keepa as a pre-scraped resource for Amazon Product data and historical trends. Including product research, markerplace details and visual charts.