Allow adding item to cart with variable price from url - Magento 2

This is a 2 part project. I would like to be able to add an item to the shopping cart via a simple GET url (not POST) url: /add_to_cart_u/{sku} example: /add_to_cart_u/1200-100 * so have to bypass the formkey when adding via the url I would also like some items to be added and allow a dynamic price to be set in the url. * Only items with the product attribute `allow_dynamic_price` can be allowed to be changed url: /cart/item/add_with_price/{sku}/{price} example: /cart/item/add_with_price/9413-01-001/6.00 please let me know if you have any questions. thank you.