Is there a possibility that we could add a custom shipping price at checkout through an API call or script?
I want to modify the price based on some rules and I can't figure out how to do it in Shopify. Any help will be highly appreciated.
Modify Shopify Shipping Rates at Checkout
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2 Answers
You can do this by implementing your own CarrierService:
https://shopify.dev/docs/admin-api/rest/reference/shipping-and-fulfillment/carrierservice
You can use an app like this: https://apps.shopify.com/discount-on-cart-pro to display the shipping fee or shipping fee estimate in your cart summary. It’s also free shipping tier compatible, so you can promote that using the app as well.
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