How to connect Shopify to Amazon? [2025]

OneCart connects your Shopify store to Amazon with automatic inventory sync, seamless order processing, and the ability to cross-post products between platforms. Manage both stores from one dashboard and tap into Amazon’s massive customer base without juggling multiple seller centers.

Running a successful Shopify store and wanting to access Amazon’s billions of customers? You’re looking at one of ecommerce’s biggest opportunities. But the thought of managing inventory, orders, and product listings across two vastly different platforms can feel overwhelming.

The traditional approach means double complexity: recreating your entire catalog on Amazon, managing separate inventory systems, processing orders from different dashboards, and constantly switching between platforms to keep everything synchronized.

In this guide, we’ll show you exactly how to connect Shopify to Amazon using OneCart’s integration platform, turning multi-platform complexity into streamlined operations.

Why Connecting Shopify to Amazon Matters

Access massive customer reach – Amazon has over 300 million active customers worldwide who may never discover your Shopify store.

Leverage Amazon’s trust factor – Many customers prefer buying through Amazon’s established ecosystem and Prime shipping.

Diversify your revenue streams – Reduce dependence on a single sales channel and protect against algorithm changes or platform issues.

Scale without operational chaos – Expand to Amazon without doubling your inventory management and order processing workload.

Test new markets efficiently – Use Amazon’s global infrastructure to reach international customers without building separate international operations.

The Manual Way vs. the Smart Way

The traditional approach means setting up Amazon Seller Central separately, manually recreating your entire product catalog with Amazon-specific requirements, building separate inventory tracking systems, and constantly switching between platforms to manage orders and stock levels.

The smart way is using OneCart’s integration platform, which connects both platforms and manages everything from a unified dashboard.

How OneCart Connects Shopify to Amazon

Here’s the exact process:

1. Connect both platforms

Link your existing Shopify store and Amazon Seller Central account to OneCart with secure API connections that take minutes to set up.

2. Import and optimize your catalog

Import your Shopify products into OneCart, then cross-post selected items to Amazon with optimized titles, descriptions, and categorization for Amazon’s algorithm.

3. Enable real-time inventory sync

Set up automatic inventory synchronization so when products sell on either platform, stock levels update instantly across both stores, preventing overselling.

4. Centralize order management

All orders from both Shopify and Amazon flow into OneCart’s unified order management system for faster, more efficient fulfillment.

5. Configure platform-specific pricing

Maintain consistent pricing or set different prices to account for Amazon’s fee structure and optimize profitability on each platform.

6. Monitor unified performance

Track sales, inventory levels, profitability, and performance metrics across both platforms from OneCart’s comprehensive reporting dashboard.

Example: Electronics Store Expansion

Imagine you run a successful electronics accessories store on Shopify with 400 products. You want to tap into Amazon’s customer base but dread recreating your catalog manually.

Manual approach: Manually recreate 400 products on Amazon (60+ hours) + learn Amazon’s specific requirements + build separate inventory tracking + manage two complex order systems = weeks of setup and ongoing double work.

OneCart approach: Connect platforms (15 minutes) + import and optimize catalog (30 minutes) + enable auto-sync (10 minutes) = Total setup: 55 minutes, with ongoing unified management.

Bonus: Beyond Just Shopify and Amazon

OneCart’s integration power extends far beyond connecting just two platforms. You can integrate:

Source platforms: Shopify, Shopee, Lazada, TikTok Shop

Destination platforms: All of the above plus Amazon, WooCommerce, Magento, Zalora, Decathlon, RedMart, Fairprice

This means your successful Shopify catalog can become the foundation for expansion across multiple global marketplaces, not just Amazon. Connect and manage up to 50+ shops from the same dashboard, scaling your reach exponentially.

Real-Time Sync Across All Platforms

When a product sells on Amazon, OneCart instantly updates inventory on Shopify and any other connected platforms. When you add new products to Shopify, cross-post them to Amazon and your other channels with one click.

Orders from all platforms flow into one system, so you can process and fulfill everything efficiently without constantly switching between seller dashboards.

Final Thoughts

Connecting Shopify to Amazon isn’t just about adding another sales channel — it’s about accessing one of the world’s largest customer bases while maintaining operational efficiency. Instead of doubling your workload, OneCart lets you multiply your sales opportunities while simplifying management.

OneCart makes Amazon expansion effortless. One dashboard, real-time sync, and the ability to scale across 50+ connected shops as your business grows.

Start your expansion today and connect your Shopify store to Amazon with OneCart!

Frequently Asked Questions

How long does it take to connect Shopify to Amazon through OneCart?

The initial connection takes about 15-20 minutes for both platforms. Importing and optimizing your product catalog for Amazon depends on size, but most stores complete the full setup process within 60-90 minutes.

Will connecting affect my existing Shopify store performance?

No, OneCart integrates through official APIs without affecting your Shopify store’s performance, speed, or functionality. Your customers won’t notice any difference in their shopping experience.

Can I choose which products to list on Amazon?

Absolutely. You have complete control over which products sync between platforms. You can select individual items, specific collections, or sync everything based on your Amazon strategy and category approvals.

How does OneCart handle Amazon’s specific requirements?

OneCart helps optimize your product listings for Amazon’s requirements, including proper categorization, keyword optimization, and compliance with Amazon’s listing standards, while maintaining your original Shopify product information.

What happens to orders from both platforms?

All orders from Shopify and Amazon flow into OneCart’s unified order management system, allowing you to process, fulfill, and track shipments from one dashboard instead of managing multiple seller centers.

Can I set different prices on Shopify vs Amazon?

Yes, OneCart supports platform-specific pricing. You can maintain consistent pricing or adjust prices to account for Amazon’s fee structure and optimize profitability for each platform.

Does inventory sync work in real-time between Shopify and Amazon?

Yes, inventory updates happen in real-time. When a product sells on Amazon, the stock level immediately updates on Shopify and vice versa, preventing overselling across all connected platforms.

What if I already have products listed on both platforms separately?

OneCart can help consolidate and sync your existing listings. During setup, you can map existing products across platforms to ensure proper inventory sync without creating duplicate listings.

Can I connect other marketplaces beyond Shopify and Amazon?

Yes, OneCart supports connections across multiple platforms including Shopee, Lazada, TikTok Shop, Zalora, Decathlon, WooCommerce, Magento, and many others, all managed from the same unified dashboard.

How does OneCart handle Amazon FBA inventory?

OneCart works with both Amazon FBA and FBM (Fulfilled by Merchant) inventory models, allowing you to sync stock levels appropriately whether you’re using Amazon’s fulfillment services or handling shipping yourself.

What kind of reporting can I get for both platforms?

OneCart provides comprehensive reporting across all connected platforms, including sales performance, inventory levels, profit margins by platform, best sellers, slow-moving stock, and detailed analytics filterable by platform, time period, and product categories.

Does OneCart help with Amazon’s category approval process?

While OneCart doesn’t handle category approvals directly, it helps ensure your product listings meet Amazon’s requirements once you have the necessary approvals, making the transition from Shopify smoother.

How does cross-posting work for product variations and bundles?

OneCart seamlessly handles complex product structures including size/color variations, product bundles, and different SKU configurations, ensuring all variations sync properly between Shopify and Amazon.

What happens during high-traffic sales periods like Prime Day?

OneCart is built to handle high-volume sales periods. During major shopping events, real-time sync ensures accurate inventory even with hundreds of orders per hour, preventing overselling when traffic spikes.

Is there ongoing support for managing both platforms?

Yes, OneCart provides local Singapore support and worldwide online support for all your multichannel management needs, helping you optimize performance across Shopify, Amazon, and any other connected platforms.