4Seller ERP-Free European and American local e-commerce ERP

Reliable Delivery: >97% on-time rate, 7 days a week.

1-Day Shipping: Deliveries as fast as 1 day after shipping.

Lower Costs: Low, predictable fees for fulfillment and storage.

Instant Tracking: Real-time updates with tracking info within 24 hours.

Ditch the complexity. Connect eBay to Amazon in clicks. Manage any order volume from one central dashboard—flawless fulfillment, total control.

Real-time Triple Sync (Orders, Inventory & Tracking)
Protect Your Ratings. Auto-sync tracking and stock levels to meet eBay strict fulfillment deadlines without lifting a finger.
Unlimited SKU Mapping
Scale Effortlessly. Connect any number of eBay listings to Amazon FBA SKUs. No spreadsheets, no manual errors, no limits.
Strategic Buffer Inventory Protection
Prevent Overselling. Set a safety stock net to avoid "Out-of-Stock" penalties and platform bans during viral sales spikes.
Handles Product Bundles
Boost AOV. Sell multi-item kits on eBay with automated inventory deduction from individual Amazon units.
Set-and-forgot
Automate your entire fulfillment workflow and spend your time on content and strategy, not logistics.
Product listing
Boost listing efficiency. With one click, publish your Amazon listings to your target platform stores.

4 Simple Steps to Automation

Secure Connect
Link your eBay and Amazon accounts via 4Seller safe OAuth in seconds.
Smart Mapping
Map your eBay listings to Amazon SKUs with a few clicks.
Rules setting
Define your fulfillment preferences and switch to Autopilot.
Go Live
Enable real-time inventory sync and let 4Seller handle the rest.

Integrated with major European and American e-commerce platforms, 4Seller allows direct order processing and shipping via Amazon MCF

If you don't find your question here, it is recommended to check the Help documentation for more information.

Is it safe to connect my accounts via 4Seller?
Absolutely. We use OAuth 2.0 authentication, the industry standard for secure integration. 4Seller never stores your login credentials. We only access the specific data needed to sync your orders and inventory, ensuring your account remains 100% secure.
How does the system prevent overselling on eBay?
4Seller provides Real-time Inventory Sync. We constantly monitor your Amazon FBA stock levels and update your eBay listing accordingly. You can also set ""Buffer Inventory"" rules to reserve stock, ensuring you never face penalties for out-of-stock orders.
Can I map one Amazon SKU to multiple eBay listings?
Definitely. Our Smart SKU Mapping tool is highly flexible. You can link multiple eBay listings to a single Amazon SKU, making catalog management effortless.

Does 4Seller support automatic fulfillment for platform orders?
Yes! With our ""Set-and-Forget"" automation, 4Seller identifies incoming orders and automatically routes them to Amazon MCF based on your predefined rules. This eliminates manual intervention, ensuring your orders are processed 24/7 without delays.
Do I need to manually upload tracking numbers?
No. That’s the beauty of the automation. Once Amazon ships the order, 4Seller automatically fetches the tracking info and pushes it back to sales channel. This completes the order cycle instantly, keeping your shipping metrics healthy.

Manage your e-commerce

business in one place