Send Metafield Data to Checkout as Shipping Rates Using Shopify's API?

[UPC278999-1]

Would it possible to send metafield data to be used as shipping rates to checkout using Shopify's API? See screenshot below for mockup of expected behavior. Also, we are using an app called Metafields Manager here.

[UPC278999-1 · Accepted solution]

Update: This is not possible. I was told that Shopify doesn't allow for Metafields to be added to delivery methods and even if it did Metafields have a separate data structure for that value.