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Syncing BigCommerce with Amazon, Walmart, and eBay Seamlessly

How to Connect, Manage, and Grow Across Marketplaces Without Losing Control

Selling across Amazon, Walmart, and eBay is a powerful way to expand your reach and increase revenue. But without proper syncing, multichannel selling from BigCommerce can become chaotic — leading to overselling, manual errors, delayed shipments, and listing inconsistencies.

This guide shows how to seamlessly sync your BigCommerce store with Amazon, Walmart, and eBay — covering product listings, inventory, orders, pricing, and fulfillment — all while minimizing risk and maximizing growth.

Why Syncing Matters for Multichannel Sellers

Without SyncingWith Seamless Sync
Duplicate listings and manual uploadsCentralized listing creation from BigCommerce
Risk of overselling when stock sells on one platformReal-time inventory sync across channels
Manually updating prices and salesGlobal price updates from BigCommerce
Logging into each marketplace dailyUnified dashboard with order and product visibility
Delays in fulfillment and tracking updatesOrders routed and updated automatically

Without sync, scaling to multiple marketplaces becomes a burden. With it, it’s a growth engine.

What You Need to Sync Between BigCommerce and Marketplaces

A complete sync includes:

  • ✅ Product Data (titles, images, descriptions, GTINs, etc.)
  • ✅ Category Mapping (each platform has different taxonomy)
  • ✅ Pricing and Discounts (including rules per channel)
  • ✅ Inventory Levels (real-time stock tracking per SKU)
  • ✅ Order Import (pull orders from each platform into BigCommerce)
  • ✅ Fulfillment and Tracking (update order status and tracking back to Amazon, Walmart, eBay)

Top Tools to Sync BigCommerce with Amazon, Walmart, and eBay

🔹 EcomBiz.AI (All-in-One Multichannel Sync)

Ideal for: Mid-size to enterprise BigCommerce sellers managing 3+ channels

Features:

  • Bulk-list products from BigCommerce to Amazon, Walmart, and eBay
  • Auto-map product attributes and categories
  • AI-powered listing optimization (titles, bullets, compliance)
  • Real-time inventory and price sync
  • Import orders into BigCommerce
  • Push fulfillment and tracking back to each marketplace
  • Monitor channel performance per SKU

Why It Stands Out:
One of the few platforms that syncs all three marketplaces and supports social commerce like TikTok and Facebook — ideal for retailers scaling beyond traditional marketplaces.

🔹 Codisto (by Klarna)

Ideal for: Sellers focusing on Amazon and eBay

Features:

  • Embedded directly in BigCommerce
  • Map products and pricing templates
  • Sync inventory and orders with Amazon and eBay
  • Custom rules for each channel

Limitations:
No support for Walmart. Limited reporting and no AI content enhancements.

🔹 CedCommerce Integrations

Ideal for: Budget-conscious sellers launching channel by channel

Features:

  • Separate apps for Amazon, Walmart, and eBay
  • Listing creation from BigCommerce
  • Stock and order sync
  • Channel-specific settings per product

Limitations:
Requires managing multiple dashboards. More manual setup.

Step-by-Step: Syncing BigCommerce with Amazon, Walmart & eBay via EcomBiz.AI

✅ Step 1: Connect BigCommerce

  • Authorize API access
  • Import your product catalog
  • Audit for missing fields (e.g., GTIN, brand, images)

✅ Step 2: Connect Marketplaces

  • Authorize Amazon Seller Central, Walmart Seller Center, and eBay Seller Hub
  • Choose default settings for each (pricing logic, shipping templates, tax handling)

✅ Step 3: Map Listings

  • Match BigCommerce categories to marketplace categories
  • Adjust titles and descriptions if needed
  • Use AI to rewrite listing copy per channel rules
  • Validate all required fields (bullet points, attributes, brand)

✅ Step 4: Enable Real-Time Sync

  • Inventory sync across platforms (auto-adjust on each sale)
  • Price sync for marketplace-specific pricing rules
  • Order sync into BigCommerce dashboard
  • Shipping tracking auto-updates pushed back to marketplace

✅ Step 5: Monitor & Optimize

  • Track listing errors, suppressed SKUs, and underperformers
  • Adjust pricing, titles, or fulfillment rules as needed
  • Use performance dashboards to identify bestsellers by channel

Common Syncing Mistakes to Avoid

🚫 Not using consistent SKUs across platforms
🚫 Missing GTINs or product identifiers required by Amazon/Walmart
🚫 Letting marketplace listings go stale without syncing product updates
🚫 Forgetting to map fulfillment methods (e.g., FBA vs. merchant fulfilled)
🚫 Manually fulfilling marketplace orders outside of BigCommerce
🚫 Not updating tracking info, leading to late shipment penalties

Benefits of Seamless BigCommerce-Marketplace Sync

✅ Save hours on manual listings
✅ Eliminate overselling and fulfillment delays
✅ Scale to multiple channels with confidence
✅ Maintain brand consistency across marketplaces
✅ Centralize order and inventory control
✅ Increase revenue without hiring more staff

Final Thoughts: One Catalog, Many Channels — Powered by Sync

Multichannel success starts with a clean product catalog in BigCommerce and the right sync tools to keep everything aligned across Amazon, Walmart, and eBay.

With the right system in place, you can:

  • Launch new products across channels instantly
  • Maintain real-time inventory control
  • Avoid compliance violations and stockouts
  • Manage all orders in one place

EcomBiz.AI gives BigCommerce merchants the automation, AI, and control needed to grow across marketplaces — without compromising performance or profit.

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