FBM fulfillment, FBA prep, and Seller Central integration all in one place. Ship Amazon orders same day, maintain your seller metrics, and prep inventory for FBA without the Amazon fee surprises.
99.8% Order Accuracy
Same-Day Shipping
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FBA prep turnaround
On-time ship rate
IPI penalties for clients
Hidden Amazon surcharges
A streamlined 6-step process ensures every order ships fast, accurately, and with full visibility.

Link Seller Central via MWS/SP-API. Orders sync automatically across FBM and FBA channels.

Ship your inventory to our fulfillment centers. We receive and shelve within 24 hours.

Amazon FBM orders route to our WMS instantly. We pick, pack to Amazon spec, and ship same day.

Send us inventory for FBA. We label (FNSKU), poly-bag, bubble-wrap, carton, and palletize per Amazon requirements.

We create your FBA shipment plans, print box-level content labels, and send to the right Amazon FC.

Track FBM orders, FBA inventory, and IPI score all in one dashboard.
Purpose-built infrastructure, real-time technology, and hands-on service - all under one roof.
Accurate FNSKU application on every unit. We scan and verify each label to prevent commingling and Amazon receiving errors.
Poly-bagging, bubble wrap, suffocation warnings, carton requirements - we follow Amazon prep guidelines precisely to prevent costly FC rejections.
FBM orders placed before 2 PM ship same day. We maintain your Seller Central metrics: on-time %, tracking rate, and cancellation rate.
Run both fulfillment channels from one inventory pool. When FBA runs out, FBM takes over automatically. No stockouts, no lost Buy Box.
Our inventory management prevents excess storage fees and IPI score drops. We track your sell-through rates and alert you before Amazon penalizes.
US, Canada, UK, EU, Japan - we fulfill across all Amazon marketplaces and handle international shipping documentation.
Whether you are shipping 200 orders a month or 200,000, our infrastructure scales with you.
Sellers who fulfill their own Amazon orders and need professional pick/pack/ship to protect their metrics.
Brands sending inventory to Amazon FBA who need reliable, compliant prep without doing it themselves.
Sellers running both channels simultaneously who need intelligent inventory routing between them.
Vendors or sellers who also ship wholesale and need one 3PL for all channels.
Overseas brands selling on Amazon US who need US-based warehousing and fulfillment.
Brands shipping 1,000+ Amazon orders/month who need scale and reliability.
Amazon sellers have two primary fulfillment options: FBA (Fulfilled by Amazon) where Amazon warehouses and ships your products, and FBM (Fulfilled by Merchant) where you or a 3PL ships directly to customers. Most successful sellers use both.
FBA is powerful for fast-moving, small, lightweight products where Amazon storage fees are manageable. FBM via a 3PL like 3PLCity gives you more control, flexibility, lower costs for large items, and the ability to fulfill the same inventory across multiple channels.
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Do you handle FBA prep to Amazon specifications?
Can you fulfill FBM orders and prep FBA from the same inventory?
How do you help protect my Seller Metrics?
Can you help me get Seller Fulfilled Prime (SFP)?