Shopping Cart Crawler

I want to build a web application or a web plugin or crawler that can monitor any shopping cart that is added to the application, so that when a user have the plugin on their system or browser and they shop from their desire website, the crawler or plugin or application can monitor what is in their cart and move details (product names, product links, product image, price, quantity, weight etc) into my website and store the details into a temp database for the customer to checkout and pay for those items after calculating shipping and other charges on my website. Shipping calculation etc will be on my website but we just need to know what the customer wants to buy so that we can help them buy and ship to them Example of such application is a chrome extension called MallforAfrica. There challenges with the MallforAfrica as it confuses customers, you need to use the app/chrome extension developed by [login to view URL] to know and see how it works before bidding or interested in doing this. Also you can check [login to view URL] This website does same thing in another way, if you can get the crawler on this website, you can also test and see how it works on this website Also an API system [login to view URL] has API crawlers that can extract such information from any website. PLEASE DO NOT BID IF YOU DO NOT UNDERSTAND. YOU CAN UNDERSTAND BETTER IF YOU CHECK THE REFERENCES I HAVE ADDED PLEASE SO NOT WASTE MY TIME AND I ALSO NEED A SAMPLE CODE TEST TO SEE YOU CAN DO THIS