A carrier service provides real-time shipping rates to Shopify. Some common carrier services include FedEx, UPS, and USPS. The term carrier is often used interchangeably with the terms shipping company and rate provider.
Also known as Carrier Calculated Shipping (CCS)
For Shopify merchants having issues connecting the Zonos Landed Cost (Duty and Tax) app, you may see an alert message letting you know that the Shopify Carrier Service API must be enabled.
Below is a list of ways you can gain access to the Carrier Service API or Carrier Calculated Shipping (CCS).
Note that CCS will not be automatically added to your account.
Once you have chosen one of the following options above, you will need to contact Shopify to get the CarrierService API or CCS enabled for your store.