How to Sync Shopify Inventory to Amazon (Without Overselling)

Selling on both Shopify and Amazon is one of the most common ways to grow an online brand. Your Shopify store is where you own the customer relationship. Amazon is where the shoppers already are. Together, they cover a lot of ground.

The hard part is the stock count in the middle. Shopify and Amazon don’t talk to each other about inventory. Sell your last unit on Shopify at 2 p.m., and Amazon will keep selling it until someone notices. That means cancelled orders, unhappy customers, and on Amazon, a hit to your seller metrics that’s hard to undo.

Listing Mirror connects the two so that a sale on one channel updates the other within minutes. Here’s how it works.

One Stock Pool for Both Channels

Instead of keeping two separate inventory counts and hoping they match, Listing Mirror keeps one central inventory and calculates what each channel should show from it.

When an order comes in on Shopify, Listing Mirror subtracts those units from your stock and queues an update for your Amazon listings. When an order comes in on Amazon, the same thing happens in reverse. Your quantities stay in step on both channels within minutes of each sale, with no spreadsheets and no manual edits.

If you sell on other channels too, like Walmart, eBay, or TikTok Shop, they draw from the same pool. Adding a channel doesn’t add another count to manage.

You Choose Where Your Inventory Lives

Every business tracks stock a little differently, so Listing Mirror lets you decide which system holds the master count.

• Manage inventory in Listing Mirror. Listing Mirror is the source of truth and pushes quantities out to Shopify and Amazon.
• Keep Shopify as your source of truth. If your team already maintains stock in Shopify, Listing Mirror can pull quantities from your Shopify locations and push them to Amazon.
• Manage in Seller Central. If you prefer to adjust stock on the Amazon side, Listing Mirror can read those changes and carry them over.

Whichever you pick, you’re not forced to change how your warehouse team works on day one.

Automatic Product Matching

Before inventory can sync, Listing Mirror needs to know which Shopify product is which Amazon listing. In most cases, that happens automatically.

When you connect your stores, Listing Mirror imports your listings and links them by SKU. If your Shopify SKU matches your Amazon seller SKU, they’re linked, and there’s nothing else to do. If your SKUs don’t match across channels, you can link them in bulk with a spreadsheet instead of clicking through products one by one.

Quantity Controls That Protect You

Syncing the same number everywhere isn’t always what you want. Listing Mirror gives you controls for each channel:

• Safety stock (holdback). Hold back a few units from Amazon so a sudden rush doesn’t take you to zero before the next update lands.
• Maximum quantity. Cap how many units a channel can show, for the whole channel or for a single product.
• Warehouse selection. Choose which warehouses feed which channel. Your Shopify locations can be mapped to warehouses in Listing Mirror.
• Kits and bundles. Sell a bundle on Amazon and the individual items on Shopify. Listing Mirror works out how many complete bundles your component stock can make and updates both.
• Vacation mode. Set a channel to zero while you’re away, then turn it back on when you’re ready.

When a product sells out, Amazon is sent a quantity of zero, so the listing stays in place and is ready to sell as soon as you restock.

Works With FBA, Too

Many Shopify sellers also send inventory to Amazon’s fulfillment centers. Listing Mirror handles that alongside your own stock.

• FBA quantities are imported every hour and kept in their own warehouse inside Listing Mirror, so you can see them next to the stock on your shelves.
• Your FBA and merchant-fulfilled offers stay separate. Listing Mirror doesn’t overwrite Amazon’s count for FBA offers, only the listings you ship yourself.
• Fulfill Shopify orders from FBA. With Multi-Channel Fulfillment turned on, Listing Mirror can send eligible Shopify orders to Amazon to pick, pack, and ship, and bring tracking back to Shopify automatically.

Get Your Shopify Products onto Amazon

If you’re just starting on Amazon, you don’t have to retype your catalog. Listing Mirror can use the product data you already have in Shopify to create Amazon offers for items that already exist in Amazon’s catalog, matched by ASIN or UPC. You can create them on demand or let Listing Mirror do it automatically as new products appear.

Different Prices on Each Channel

Amazon’s fees are different from Shopify’s, so many sellers price differently on each. Listing Mirror lets you set channel-specific pricing rules, like a fixed or percentage increase for Amazon, and pushes price updates to Amazon automatically. Your Shopify prices stay where you set them.

Bring Amazon Orders into Shopify

Want to see every order in one place? Listing Mirror can send your Amazon orders, and orders from your other marketplaces, into Shopify. That keeps your fulfillment workflow in one tool, whether you ship from Shopify or from Listing Mirror.

Running More Than One Store?

Listing Mirror supports multiple Shopify stores and multiple Amazon seller accounts under one login. Every store and account draws from the same central inventory, so you can grow without multiplying the work.

Why Not Just Use a Shopify App?

There are Shopify apps that connect to Amazon, and for a small catalog on two channels they can do the job. The trouble starts when you grow. Add Walmart, a second warehouse, bundles, or FBA, and you end up stitching together several tools that each keep their own copy of your inventory.

Listing Mirror was built for multichannel selling from the start. Shopify and Amazon sit alongside every other channel you connect, all running from the same stock pool and the same dashboard. Our US-based support team helps you get connected and stays with you as you add channels.

Getting Started

Connecting Shopify and Amazon takes a few steps:

1. Create your Listing Mirror account.
2. Connect your Shopify store and your Amazon seller account.
3. Let Listing Mirror import your listings and link them by SKU.
4. Choose where your master inventory lives and set any safety stock or quantity caps.
5. Turn on syncing.

From then on, every sale on Shopify updates Amazon, and every sale on Amazon updates Shopify, without you lifting a finger.

Ready to Stop Overselling?

If you’re tired of checking two dashboards and fixing stock counts by hand, Listing Mirror can take that off your plate.

Create an account or schedule a demo to see your Shopify and Amazon inventory working together. Learn more about inventory syncing.

Sell More, Work Less.™