Multi-channel retail systems

One Inventory and Order Truth Across Every Selling Channel

Conjai builds the operational infrastructure that connects your channels, synchronizes inventory, coordinates pricing logic, and gives you one operating view of the business.

Request an Operational Fit ReviewSee where it breaks →

For Founders, COOs, CFOs, and Operations or Ecommerce Leaders selling across more than one storefront or marketplace.

  1. 01Order capture Counts update on one channel at a time
  2. 02Authorization Payment is held or captured by hand
  3. 03Order routing Orders are assigned from exports
  4. 04Pick and pack Boxes are checked against a spreadsheet
  5. 05Ship and settle Tracking is re-keyed into each channel
  6. 06Returns Returned items sit unsorted

The Pain Is the Space Between Platforms

Amazon does not know what Shopify sold. The warehouse does not know what eBay listed. Every discrepancy becomes a manual fix or an oversell that damages margin and trust.

StageThe informal workaroundThe engineered standard
InventoryEach channel keeps its own count of the same unit.One register every channel reads from and writes to.
PricingRules that work on one channel break on another.Channel-specific rules with margin floors.
OrdersOversells are found after the sale.Stock is deducted on the sale, on every channel.
ReturnsExceptions are fixed by hand in a spreadsheet.A defined path for returns, mismatches and edge cases.

The Six Layers, Applied to a Selling Operation

The same method we use everywhere, in the vocabulary of a warehouse and a listing.

  1. 01

    Outcome

    A unit sells once, on any channel, at the price you set.

  2. 02

    Flow

    Listing, order, pick, ship, return: one path, every handoff named.

  3. 03

    Data

    One inventory register that every storefront and marketplace reads from.

  4. 04

    Ownership

    A named person for every exception and every channel rule.

  5. 05

    Automation

    Stock, price and order status sync on their own. Judgment calls go to a person.

  6. 06

    Feedback

    Mismatches and drift surface the day they happen.

The Pain Isn’t One Broken Platform. It’s the Space Between Platforms.

Amazon doesn’t know what Shopify sold. The warehouse doesn’t know what eBay listed. Pricing rules that work on one channel break on another. Every discrepancy becomes a manual fix — or an oversell that damages margin and customer trust.

Real build | Multi-channel retail

HEAT4YAFEAT

The challenge. A collector in Indianapolis selling through eBay and StockX seller portals. Demand was real. Infrastructure was not: no owned catalog, no owned checkout, no record of a pair that a second channel could read.

HEAT4YAFEAT: one inventory register eBay and StockX seller portals connect to one inventory register. The register holds inventory, every pair he owns, and drops, upcoming releases that are not stock. A drops pipeline lists releases into the register as drops; some drops become inventory once acquired. The brand site is the public layer of the register. eBay seller portal StockX seller portal connected to that record One inventory register Inventory every pair he owns Drops upcoming releases, not stock Brand site public layer of the register Drops pipeline listings, images, a take in his voice some, once acquired listed as drops

What Conjai built. The operating layer first. One inventory register for every pair he owns. eBay and StockX connected to that record. A drops pipeline that publishes upcoming releases — listings, images, and a take in his voice — without treating those rows as stock. A pair becomes inventory only when he acquires it. The brand site is the public layer of that register, not a separate catalog.

Seller record: 650+ pairs placed | 99.1% positive on eBay | selling since 2016

Not Sure Where the Channels Stop Agreeing?

Book a 30-minute Operational Fit Review. Bring one item that oversold, one listing that drifted, or one order you fixed by hand. We trace it across every channel and tell you plainly whether Diagnose is worth doing.

Book an Operational Fit Review

No software demo. No phone number required.

One Operating Layer Across the Channels.

Inventory Synchronization

Continuous inventory synchronization with automated reconciliation and exception handling.

Pricing Logic

Channel-specific pricing rules, margin floors, and controlled repricing workflows.

Order and Fulfillment Flow

Automated coordination from order capture through routing, fulfillment, and status updates.

Marketplace Data

Clean product mapping and structured data across storefronts and marketplaces.

Exception Handling

Workflows for returns, mismatches, unavailable inventory, and non-standard edge cases.

Operational Visibility

Inventory, channel performance, margin, and exception monitoring in one view.

Illustrative sequence

One Sale, Two Ways

Today

  1. SaleThe last unit sells on one marketplace
  2. LaterThe other channels still show it in stock
  3. LaterA second order arrives for a unit that is gone
  4. Next dayManual refund, apology, and a marketplace ding

After a Build

  1. SaleThe sale is written to one inventory record
  2. SyncEvery channel reads the new count
  3. SyncChannel pricing rules and margin floors still hold
  4. ExceptionAnything that does not match goes to a queue, not a customer

An oversell, a refund, a marketplace ding

Every channel shows the real count

The Evidence

The Hidden Work of Selling on More Than One Channel

Each channel has its own rules and cancellation thresholds. Kept in spreadsheets, the reconciling grows with every order.

65%
Hybrid Omnichannel Inventory Accuracy

Average inventory accuracy across hybrid retail and warehouse channels sits at 65%, with 58% of surveyed merchants operating below 80% accuracy.

Source: Fluent Commerce / IHL Group Omnichannel Report | Omnichannel retail benchmark
2.5% / 2.0%
Marketplace Pre-Fulfillment Cancel Cap

Amazon Seller Central enforces a strict 2.5% Pre-Fulfillment Cancel Rate threshold (2.0% on Walmart Marketplace) before automated listing deactivation or account suspension triggers.

Source: Amazon Seller Central, 2026 | Walmart Marketplace (<2.0%)
80 / 75
Title Characters, eBay vs Amazon

eBay allows 80 characters in a listing title; Amazon now caps most titles at 75. Every channel has its own rules, so one product becomes several listings to keep in step.

Source: eBay Seller Center | Amazon Seller Central, 2026

Why Not Just Buy a $200/month Sync Tool?

Buy the platform if your catalog and workflows fit it. Unique-unit inventory, pair-level pricing, consignment, shows, and a drops calendar that is not stock do not fit it. Many businesses only need custom engineering once their channels, pricing logic, inventory rules, or exceptions move beyond the standard case. We build for the part the platform won’t do — and we’ll tell you plainly when the platform is enough.

  • Shopify
  • WooCommerce
  • Amazon
  • eBay
  • Walmart Marketplace
  • TikTok Shop
  • Etsy
  • GOAT
  • StockX
  • BigCommerce

Platform compatibility depends on available APIs, data access, and your specific workflow. This list is representative, not a claim of completed integration work on every platform.

Words We Use in Multi-Channel Retail

Plain definitions for the synchronization rules that keep one inventory record true across every storefront.

SKU Drift
The discrepancy between physical warehouse or shelf inventory and the digital quantities shown across Shopify, Amazon, eBay, StockX, and POS systems.
Idempotency
An engineering rule that guarantees an order, webhook, or stock update applied more than once produces the exact same inventory count, preventing double deductions.
Data Plumbing
The custom API and webhook connections between storefronts, marketplaces, fulfillment, and accounting that keep one inventory register true everywhere.
Process Drift
When operators fall back on CSV exports and manual spreadsheet fixes because channel rules and exceptions outgrew a basic sync plugin.
Complexity Ceiling
The operating point where a growing company is too complex for manual coordination across its tools, but too lean to staff an internal enterprise systems team.
System Fit Map
The architectural blueprint delivered in Diagnose that maps every system, handoff, master record rule, and exception queue before any code is written.

Read the full Data Plumbing methodology →

Joshua Pyne designs and builds every system. Twenty years on the enterprise side; now the operator who writes the code. About Joshua and Conjai →

What do the mismatches cost?

Example values — replace them with yours. Your numbers, not a benchmark.

— a month in oversells and manual fixes

Your Channels Should Work as One System.

Request an Operational Fit Review

FAQ

Questions We Hear

How Do I Stop Overselling Across Shopify, Amazon, and eBay?

By keeping one inventory record that every channel reads, with continuous synchronization, automated reconciliation, and exception handling for returns, mismatches, and unavailable stock.

Why Not Just Buy a Multi-Channel Sync Tool?

Buy the platform if your catalog and workflows fit it. Unique-unit inventory, pair-level pricing, consignment, shows, and pre-release drops usually do not. Conjai builds the part the platform will not do and says plainly when the platform is enough.

Which Channels and Platforms Does Conjai Work With?

Representative platforms include Shopify, WooCommerce, Amazon, eBay, Walmart Marketplace, TikTok Shop, Etsy, GOAT, StockX, and BigCommerce. Compatibility depends on available APIs, data access, and your workflow.

Can Conjai Handle Channel-Specific Pricing?

Yes. Channel-specific pricing rules, margin floors, and controlled repricing workflows are part of the retail operating layer.

Has Conjai Done This for a Real Retailer?

Yes. For HEAT4YAFEAT, an Indianapolis sneaker reseller selling on eBay and StockX, Conjai built one inventory register for every owned pair, connected the marketplaces to it, and made the brand site the public layer of that register.