When you update any of the fields, the following API is used to reflect the changes and reprice the product and cart price. For more information, click here.
PATCH https://<URL_of_the_Instance>/api/cart/v1/carts/{cartId}/items
The following API is used when you delete any product. For more information, click here.
DELETE https://<URL_of_the_Instance>/api/cart/v1/carts/{Id}