This Knowledge Base page will walk you through ByteStand MCF Shipping and the ‘Flex’ feature for 2024 stores and newer. Stores that have had ByteStand MCF Shipping installed prior to 2024 and prior to the creation of Flex will need to use the manual instructions outlined towards the end of this document.
Never heard of ByteStand MCF Shipping before? We are a Shopify app that connects your professional Amazon Seller Central account with your Shopify store. The app sends your Shopify orders to Amazon for MCF fulfillment using Prime-like shipping speeds! Learn more on our website.
Below are instructions for stores that have previously enabled the Flex feature. Flex is automatically enabled for all stores that installed ByteStand MCF Shipping in 2024 and beyond. If you are unsure if Flex is enabled or not please read this page first.
For stores that ship some products through Amazon and other products through a 3PL or manually please watch the set up video below.
Your store may have installed and set up the ByteStand MCF Shipping app before 2024, when Flex was created and thus Flex may not be enabled. You do NOT have to enable it. Just follow your unique instructions below.
This video clearly illustrates how to set up your Shopify profile in order to fulfill some products manually and other products through ByteStand MCF Shipping…before orders are placed. MCF Shipping pricing has changed since this video was created!
-> Check also how to set up MCF Shipping!
If you need more assistance after watching the video, you can see written directions below!
You cannot use other carrier calculated rates for your non-fba items! We are not compatible with USPS, UPS, FedEx, or DHL carrier calculated rates in Shopify.
Managing Mixed Fulfillment Orders in Shopify
Combined ‘free shipping’ for FBA and non-fba mixed orders is not available at this time! Unfortunately, Shopify does not look at the ‘Total’ of a order and give free shipping based off of the Order Total. As your store is fulfilling some items from a manual location and thus have set up rules to offer free shipping for manual products over a certain cost. And then the store has set up a secondary rule that if FBA items are fulfilled by MCF Shipping, and the FBA items total over X amount, then the customer gets free shipping for FBA items.
For Example, if your order total is at $100, and you offer free shipping for orders over $100. But, the customer only spent $50 on fba items and $50 on non-fba items. Shopify will not be triggered to offer free shipping for the order. As it’s coming from different fulfillment services….and Shopify requires different shipping rules for different fulfillment services. I can suggest, maybe you use a blanket discount code or Shopify discount that is automatic? But, you’d have to set up that discount within Shopify. I.E. Like ‘Free Shipping’ for all orders over X amount. Or give customers a coupon code for orders over X amount.

FBM – When you create your zone for FBM products you will need to add manual fixed rates to this Shipping Profile. You can ONLY call the manual fixed rates the SAME rate titles as you entered into our app! This is in case of ‘mixed’ orders. A mixed order is when a customer purchases a FBA item and a non-FBA item in the same order! So the Shipping Rate titles have to match to ensure that Amazon accepts the FBA portion of the orders! See example. You can then charge whatever amount you wish to ship these products. You can even add conditions to offer free shipping if the order is over a certain amount of weight. Or you can use these conditions to charge customers more for shipping.
You cannot use other carrier calculated rates for your non-fba items! We are not compatible with USPS, UPS, FedEx, or DHL carrier calculated rates in Shopify.

In my example I am charging $6 to ship my FBM products. But, in the below screenshot you will see that I am offering conditions. If the customers order is over $25 they receive free shipping for my FBM products. (Shipping To country should say U.S.)

Now you will be able to ship your FBA and FBM products in the same order successfully!


