How to add Custom Shipping method / Carrier on Shopify

First you need to understand how the API works, read https://shopify.dev/docs/admin-api/rest/reference/shipping-and-fulfillment/carrierservice The idea is very simple. In order for you to generate a custom dynamic carrier or shipping. You need to send a config data to Shopify which will has names and call back url at least once. Call back...Read more