Multi-Marketplace Connect Hub

Key Features

Unified product, inventory and order sync between Shopify and Amazon, eBay, Walmart and requested regional marketplaces

Shopify-as-source-of-truth model: catalog read via the Admin GraphQL API, changes propagated outward to each channel

Near-real-time inventory sync driven by Shopify webhooks (orders/create, inventory_levels/update, products/update) to prevent overselling

Multi-location inventory awareness — choose which Shopify location(s) feed each marketplace's available quantity

Per-channel pricing rules: fixed markups, percentage uplifts or channel-specific price lists

Per-channel stock rules: buffer quantities, minimum thresholds and SKU include/exclude per marketplace

Listing templates with bulk mapping from Shopify product fields and metafields to each channel's required attributes

Centralized order management — marketplace orders flow back into Shopify as native orders for one fulfillment queue

Channel performance reporting: revenue, units sold and sync error rates per marketplace

Embedded Polaris admin dashboard inside Shopify (no separate login)

Secure OAuth / API-credential storage per marketplace, encrypted at rest

Sync activity log with retry on transient marketplace API failures and clear error surfacing

Built to order, done for you

No DIY setup — a working app, built, installed and supported by ECOSIRE.

You order

Start with a one-time build price. We scope it with you at kickoff.

We build & install

ECOSIRE builds, configures and installs it on your Shopify.

Go live + support

You go live in about 2–4 weeks, with a post-launch support window.

About this Product

Multi-Marketplace Connect Hub is a Shopify app ECOSIRE builds to order for sellers running several marketplaces at once. It is not an instant App Store install — after purchase we scope your channels, build the connector, install it as a custom app on your store, and hand it over working. Typical delivery is 10–15 business days depending on how many marketplaces and edge-case mappings you need.

At its core, the Hub treats Shopify as your single source of truth. It reads your products through the Admin GraphQL API, watches multi-location inventory levels, and pushes those quantities out to each connected marketplace (Amazon, eBay, Walmart, plus regional channels like Noon, Daraz or Allegro on request). When a sale lands anywhere, Shopify webhooks (orders/create, inventory_levels/update, products/update) keep every channel decremented in near real time — so the same unit isn't oversold twice.

You manage everything from an embedded admin dashboard built with Polaris. Per-channel pricing and stock rules let you mark up Amazon, hold buffer stock on eBay, or exclude SKUs from Walmart. Listing templates and bulk mapping turn Shopify products and metafields into channel-ready listings without re-keying. Centralized order management pulls marketplace orders back into Shopify as native orders for unified fulfillment. Channel performance reporting shows revenue, units and sync health per marketplace.

Authentication uses each marketplace's official OAuth / API credentials, stored encrypted. Because we build it for your catalog and channels, the field mappings, tax handling and stock logic fit your operation — not a lowest-common-denominator template. We host nothing you don't control: the app runs against your store, and we support and update it after handover.

What you get

Custom-built Shopify app installed on your store, scoped to your specific marketplaces

Configured connectors with authenticated OAuth / API credentials for each channel you sell on

Field and metafield mapping from your Shopify catalog to each marketplace's listing schema

Per-channel pricing and stock-rule configuration applied to your live SKUs

Webhook-based real-time inventory and order sync wired into your store

Embedded admin dashboard with channel performance reporting

Handover documentation covering mappings, rules and day-to-day operation

Post-delivery support window with bug fixes and marketplace-API maintenance

Who this is for

The overselling multichannel operator

Sells the same SKUs on Shopify, Amazon and eBay and keeps oversells customers because stock isn't decremented across channels. Needs one source of truth with near-real-time, webhook-driven inventory sync.

The growth-stage brand expanding to Walmart and regional channels

Already strong on Shopify and Amazon, now opening Walmart or a regional marketplace, and refuses to manage another disconnected spreadsheet. Wants per-channel pricing and bulk listing mapping built for their catalog.

The operations lead drowning in order entry

Re-keys marketplace orders into Shopify by hand and reconciles inventory manually each night. Needs centralized order management that pulls every channel's orders into one Shopify fulfillment queue.

How Multi-Marketplace Connect Hub Compares

Criterion	ECOSIRE	Custom Build	Competitor
Built specifically for your catalog, channels and stock logic	Included	Included	Not included
Syncs across Amazon, eBay, Walmart and regional marketplaces	Included	Included	Partial support
Near-real-time inventory sync via Shopify webhooks	Included	Included	Partial support
No per-order or per-channel monthly SaaS fees	Included	Included	Not included
Available immediately with no build wait	Not included	Not included	Included
Per-channel pricing and stock rules out of the box	Included	Partial support	Partial support
Centralized marketplace order import into Shopify	Included	Included	Included
Direct support from the engineers who built it	Included	Partial support	Not included

Frequently Asked Questions about Multi-Marketplace Connect Hub

Is this an instant download from the Shopify App Store?

No. Multi-Marketplace Connect Hub is build-to-order. After purchase, ECOSIRE scopes your marketplaces, builds the connector for your catalog and channels, installs it as a custom app on your store, and hands it over working. It is not a one-click App Store listing.

How long does delivery take?

Typical delivery is 10–15 business days from the kickoff call, depending on how many marketplaces you connect and how complex your field mappings, tax handling and stock rules are. We confirm a firm timeline once we've reviewed your channels during scoping.

What about ongoing support and updates after handover?

The price includes a post-delivery support window covering bug fixes and maintenance for marketplace-API changes. Marketplaces revise their APIs over time, so we offer ongoing support and update plans to keep your connectors healthy — quoted based on the channels you run.

Which marketplaces are supported?

Amazon, eBay and Walmart are core. Regional marketplaces (such as Noon, Daraz, Allegro and others) are supported on request, provided the marketplace exposes a public listing/inventory/order API. We confirm feasibility for your specific channels during scoping before you commit.

Will it oversell my stock across channels?

That is exactly what it prevents. Shopify is the single source of truth: inventory is synced outward using Shopify webhooks (orders/create and inventory_levels/update) so when a unit sells on any channel, the available quantity drops everywhere in near real time. You can also set per-channel buffer stock to add a safety margin.

Can I set different prices on each marketplace?

Yes. Per-channel pricing rules let you apply fixed markups, percentage uplifts or channel-specific price lists — for example a higher Amazon price to absorb referral fees while keeping eBay competitive. Stock rules are equally per-channel, including buffer quantities and SKU include/exclude.