Multi‑Channel Fulfillment Software | CrazyVendor

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Sell everywhere. Fulfill from one source. CrazyVendor connects both marketplaces to Amazon Multi‑Channel Fulfillment (MCF) and Walmart Multichannel Solutions (MCS via WFS) or your 3PL, then syncs inventory and tracking back to the originating marketplace automatically.

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Trusted by modern eCommerce teams

From fast‑growing DTC brands to high‑volume resellers, teams use CrazyVendor to keep stock accurate and deliveries on time across Amazon + Walmart.

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What is Multi‑Channel Fulfillment

Multi-Channel Fulfillment (MCF/MCS) lets sellers store inventory in one location (Amazon FBA/AWD, Walmart WFS/MCS, a 3PL, or in-house) while shipping orders from all sales channels in one place through a single integrated system.

Why it matters

  • Centralized stock reduces oversells and stockouts
  • Faster delivery via Amazon and Walmart's national networks
  • Consistent branded experience across channels
  • Fewer manual steps with automated routing and updates

How It Works

  • Connect accounts

    Link Amazon Seller Central and Walmart Seller Center. Orders flow into CrazyVendor in real time.

  • Choose fulfillment

    Route to Amazon MCF, Walmart MCS (via WFS), your 3PL, or your warehouse using rules by SKU, channel, region, or SLA.

  • Sync inventory

    Every pick, return, or cancellation updates available quantity across all channels instantly.

  • Push tracking

    As soon as a label is generated, tracking and delivery status are pushed back to the originating channel and customer.

Compliance note for Walmart orders fulfilled via Amazon MCF:

Use neutral packaging and disable Amazon Logistics as the last‑mile carrier. CrazyVendor provides a policy preset so your routing stays compliant when sending Walmart orders through MCF.

Benefits You’ll Notice Fast

  • 1

    Centralized inventory management

    Keep one source of truth for on‑hand and available to sell. Eliminate duplicate buffers and manual reconciliations.

  • 2

    Faster delivery with lower overhead

    Leverage Amazon MCF, Walmart MCS, or trusted 3PL partners for two‑day‑capable speeds—without building your own network.

  • 3

    Consistent customer experience

    Uniform packaging, branded inserts, and automated notifications maintain brand trust across channels.

  • 4

    Operational efficiency

    Automation replaces manual order routing. CrazyVendor updates inventory, pushes tracking, and flags exceptions for you.

Key Capabilities

  • Smart order routing

    Prioritize lowest cost, fastest SLA, region, channel, or safety stock. Define fallbacks when thresholds are hit.

  • Real‑time stock sync

    Prevent oversells. Every action (pick, cancel, return, restock) updates channel quantities immediately.

  • Returns and RMA controls

    Create channel‑appropriate return labels, enforce inspections, restock or quarantine with notes and photos.

  • SLA monitoring and alerts

    Track promised vs. actual ship‑by and delivery times. Get alerts before breaches and drill into root causes.

Integrations

Marketplaces: Amazon, Walmart

Fulfillment Options: Amazon MCF & AWD, Walmart WFS & MCS, 3PL networks, in‑house WMS

Carriers: UPS, USPS, FedEx, DHL (via connected accounts, WFS/MCS, or 3PL)

  • Inventory Management
  • Order Management
  • Warehouse Management
  • Shipping Management
  • Customer Service Management
  • Multichannel Listings
  • Profit Analytics

Who It’s For

  • 1
    High‑mix, multi‑channel catalogs that need accurate, unified inventory
  • 2
    Brands expanding to Amazon/Walmart without duplicating stock
  • 3
    Lean teams that want automation over manual ops

Results and Impact

  • 1
    Shorter lead times and fewer shipping errors
  • 2
    Cross‑border support with region‑based routing and duty‑friendly carriersч
  • 3
    Unified profitability: compare MCF vs 3PL costs per SKU and channel in Profit Analytic

What Sellers Are Saying

CrazyVendor helped us sync inventory between Amazon and Walmart flawlessly. Our order errors dropped by 90%.

Laura M.
eCommerce Operations Manager

We used to manage multiple dashboards. Now everything—from orders to tracking—is visible in one place.

James R.
Marketplace Seller

Amazon and Walmart fulfillment became seamless after switching to CrazyVendor. It’s like having a full operations team in one platform.

Kevin T.
Online Retailer

CrazyVendor helped us sync inventory between Amazon and Walmart flawlessly. Our order errors dropped by 90%.

Laura M.
eCommerce Operations Manager

Ready to Simplify Your Fulfillment?

CrazyVendor brings Amazon and Walmart fulfillment under one roof. Centralize inventory, automate order routing, and keep every shipment on track — all from a single dashboard.

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to see how it works.

Frequently Asked Questions

Yes. Route by SKU, channel, or region—switch automatically when thresholds change.

Once a label is created, tracking posts back to the order’s origin channel and to the customer.

Yes. CrazyVendor synchronizes stock levels in real time across Amazon, Walmart, and any connected fulfillment source. When an item sells or is returned, the platform instantly adjusts available quantities to prevent overselling and ensure both marketplaces reflect accurate inventory.

Yes. Generate RMAs, enforce inspections, restock eligible items, or quarantine with reasons and photos.

Use region‑based routing and carrier presets to select cost‑effective options and simplify cross‑border workflows.

Get Started

Turn Walmart + Amazon fulfillment into an advantage.
Start a pilot with your current warehouse

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