Creating a Shopping Cart using Rest Api's in Unity C#

hi, i am very first time using the unity my client asked to develop Shopping Cart System in Unity he just given me Checkboxes with that Cart system, so when users click on checkbox the product should added to cart and when unchecked the checkbox the item should removed from the cart. so i have some API’s like this link:

You should use a REST Client to call the endpoints of your REST Api. If you don’t have experience using the UnityWebRequest system, you have other simpler options like this => GitHub - proyecto26/RestClient: 🦄 A Promise based REST and HTTP client for Unity 🎮