post https://api.helloextend.com/shipping-offers/quotes
This endpoint calculates the shipping protection premium, i.e. the price you will charge the customer for shipping protection, for eligible products in the specified cart.
The response will include the premium and a quote id which must be used to create a valid Order with Extend including shipping protection. An optional array "excluded_products" may contain a list of products that were excluded from the premium calculation if the cart contained products that are not eligible for shipping protection.