Yes, the Amazon.com Credit Card is an actual credit card. The Amazon card is a co-branded credit card issued by Chase in partnership with Amazon, and it operates on the Visa network, which means it can be used wherever Visa is accepted. Plus, cardholders get an actual physical credit card made of plastic, which usually arrives in the mail 7 to 10 business days after approval.
The Amazon.com Credit Card offers at least 1 point / $1 spent on all purchases, but it gives rewards at a higher rate on Amazon purchases. All Amazon.com Credit Card cardholders get at least 3 points/$1 spent at Amazon.com and Whole Foods Market, while Amazon Prime members earn 5 points / $1 spent.
Amazon also offers a store-only credit card. The Amazon.com Store Card is an actual credit card, too, but it can only be used for purchases at Amazon.com, Audible.com, merchant sites that accept Amazon Pay, and Amazon-branded physical stores, such as Amazon Books, Amazon 4-star, and Amazon Go.