Shopify + Manhattan OMS integration for real-time inventory and faster fulfillment

Connect Shopify to Manhattan OMS to sync inventory, orders, and shipment updates across channels, reducing oversells and speeding up pick, pack, and delivery.

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What is the Shopify + Manhattan OMS integration

Are orders piling up across online, POS, and marketplaces, while inventory stays “almost right” in Shopify? When fulfillment teams jump between screens, split shipments get messy, cancellations slip through, and customer support ends up chasing order status instead of solving issues. The Shopify – Manhattan OMS integration connects your storefront to Manhattan as the system of record for order and fulfillment decisions. Orders created in Shopify are handed off to Manhattan for allocation and orchestration, then the resulting shipment, tracking, and cancellation outcomes are reflected back in Shopify so shoppers and support see the same truth. This setup fits if Shopify is your primary sales channel, but Manhattan OMS runs fulfillment across multiple nodes, carriers, or brands.

Shopify + Manhattan OMS integration benefits

Cut overselling and backorders with Manhattan-led availability in Shopify

Speed up fulfillment decisions with Manhattan OMS allocating the right node

Reduce WISMO tickets with accurate Shopify order status and tracking

Handle split shipments cleanly and keep customers updated in Shopify

Lower cancel-and-refund errors with consistent line-level outcomes

Scale across stores, POS, and marketplaces without extra ops overhead

How the Shopify Manhattan OMS integration works technically

• Shopify order events (create, paid, canceled, address updates) are routed to Manhattan OMS via API or middleware, with idempotency keys to prevent duplicate submissions.

• Customer, shipping, tax, discount, and line-level attributes are mapped from Shopify to Manhattan order schemas, including split-ship and partial-cancel scenarios.

• Inventory availability is owned by Manhattan OMS; ATP and node-level quantities are synced to Shopify as sellable inventory or location stock, depending on store model.

• Fulfillment lifecycle updates from Manhattan (allocated, released, picked, shipped) are translated into Shopify fulfillments, including multi-package tracking numbers.

• Refund and cancellation decisions initiated in Manhattan are pushed back to Shopify with reason codes and line-level quantities to keep financial and operational states aligned.

• Delta-based sync sends only changed records; retries, dead-letter queues, and audit logs capture failures, payloads, and correlation IDs for traceability.

Why choose scandiweb to handle Shopify integration for you?

Shopify-first integration team, not generalists

We’ve delivered 50+ Shopify projects since 2016, so Manhattan OMS fits your Shopify flows without custom hacks.

Order and inventory data mapped with fewer gaps

We model line, shipment, and refund states up front, so Shopify and Manhattan stay consistent through edge cases.

Testing that covers peak traffic and real ops

We validate high-volume order scenarios, returns, and partials in staging, so peak weeks don’t become fire drills.

Tracking you can trust after the integration ships

Our GA4 and data engineering teams QA events and reconciliation, so ops and marketing see the same order truth.

Security and compliance built into delivery

ISO 27001 and 27017 certified practices reduce risk when exchanging customer, payment, and fulfillment data.

Proven at scale across complex commerce stacks

With 2,100+ projects delivered and $4 billion+ processed yearly, we know how to integrate without surprises.

Frequently Asked Questions about Shopify Manhattan OMS integration

How do you integrate Shopify with Manhattan OMS for order routing and fulfillment orchestration?

We connect Shopify order creation to Manhattan OMS APIs or middleware, then write back shipment, tracking, cancellations, and returns status to Shopify. The mapping covers line splits, holds, partial fulfillments, and exception flows.

What inventory data gets synced from Manhattan OMS to Shopify to prevent overselling?

Available-to-promise by SKU, location, and selling channel can be pushed to Shopify, including safety stock rules and backorder flags. Updates can run near real time or on scheduled intervals, depending on OMS limits and traffic.

Can a Shopify Plus store use Manhattan OMS with multiple warehouses, stores, and split shipments?

Yes, Manhattan OMS can allocate across nodes, then the integration reflects split fulfillments and multiple tracking numbers back in Shopify. We also sync fulfillment events per line item so customer support sees accurate status.

How do returns and cancellations work in a Shopify – Manhattan OMS integration?

Cancellation requests from Shopify can be validated in Manhattan OMS, then confirmed back to Shopify with the final outcome. For returns, we sync RMA status and refund triggers so Shopify stays aligned with OMS decisions.

How long does a Shopify to Manhattan OMS integration take, and what drives the effort?

Timelines depend on OMS scope, required flows (BOPIS, split, backorders), and whether you need middleware or a direct API build. scandiweb has delivered 50+ Shopify projects and handles the integration, QA, and go-live support.

Explore related Shopify OMS / WMS integrations

Start your Shopify + Manhattan OMS integration

1. Submit your integration request

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2. Join a free strategy & discovery call

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We’ll review your business systems, identify key challenges, and uncover actionable opportunities.