Ecommerce Integration: What Syncs, Why It Matters, How to Connect

Integration Updated October 22, 2026

Quick answer: Ecommerce integration means connecting your online store to the systems behind it, such as your warehouse, stock records, accounting and shipping, so data moves between them automatically instead of by copy and paste. For a store that outsources fulfillment, four flows matter most: paid orders go to the warehouse, products are matched by SKU, stock levels come back to the store, and tracking numbers come back when parcels ship. It matters because every manual step adds delay and the kind of mistakes customers notice: wrong variants, oversold stock and missing tracking. PackQuay connects your Shopify or WooCommerce store for you, with no plugin to install; stores on other platforms can send orders as a CSV or Excel file.

The four data flows that matter

Flow	Direction	When it should happen	What goes wrong if it's manual or late
1. Orders	Store to warehouse	As soon as an order is paid	Orders wait, addresses get mistyped, some get missed
2. Products and SKUs	Set up once, updated on change	When you add or edit a product	Wrong variant shipped, or orders that can't be matched to stock
3. Stock levels	Warehouse to store	Continuously	Overselling, or "sold out" while units sit on the shelf
4. Tracking	Warehouse to store	When the parcel physically leaves	Customers can't follow their parcel and start emailing you

A fifth flow is money: what each order cost to fulfil and ship. You don't need it in real time, but you do need it per order, with an invoice your bookkeeping can read.

Why integration matters: four costs it removes

Delay. Every hour an order waits to be copied into a warehouse system is an hour added to its delivery. When orders flow in automatically, the warehouse can start picking straight away; at PackQuay, stocked orders leave within 24 hours, or 48 at peak.
Picking errors. Integration matches each order line to stock by SKU, so the customer who ordered navy in large gets navy in large. Retyping orders by hand is where sizes and colors get swapped.
Overselling. If stock counts don't flow back, your store keeps selling units that aren't there, and you end up refunding or asking customers to wait.
Disputes. Late or missing tracking drives "where is my order?" messages, and without tracking on record you have little to show a payment provider if a customer disputes the charge.

One detail is easy to overlook: when tracking is sent. A system that pushes a tracking number as soon as a label is printed tells your customer the parcel has shipped while it is still on a shelf. We push tracking only after the parcel has physically left our warehouse, so the "shipped" email is true and your delivery-time data stays honest.

Four ways to connect, compared

Method	How it works	Setup	Best for	Watch out for
App	Install the provider's app; orders and tracking sync automatically	Minutes	Shopify stores	Shopify's own automatic fulfillment setting
REST API key	You create a key in your store; the provider reads orders and writes tracking back	Minutes	WooCommerce stores	The key needs Read/Write access, and pretty permalinks must be on
CSV or Excel upload	Export orders, upload the file, receive tracking back	None, but repeated every day	Other platforms, low volume	A manual step daily; stock is not synced for you
Direct API or AI connector	Your scripts or an AI assistant call the provider's API with a scoped key	Developer time	Custom setups and reporting	Key permissions and rate limits

PackQuay connects Shopify and WooCommerce stores for you and also accepts CSV or Excel files. We don't offer direct API access at the moment.

How to connect your store to PackQuay

Shopify

Message us on WhatsApp. We connect your Shopify store for you, and you approve the connection from your Shopify admin. There is no subscription and no contract.
Send us the products you sell, as links or photos; we quote product and shipping cost.
We map your SKUs and shipping lines, and add any custom packaging, inserts or bundles.
Paid orders then come in automatically and are picked, inspected, packed and shipped, and tracking goes back to Shopify.

More detail is on our Shopify fulfillment page.

WooCommerce

In WordPress, go to WooCommerce > Settings > Advanced > REST API and add a key.
Give it a description, pick a user who manages the store and set the permissions to Read/Write.
Copy the consumer key and consumer secret straight away. WooCommerce won't show the secret again.
Send your store URL, key and secret to your account manager on WhatsApp; we connect the store for you.
From then on, new orders come in automatically. When a parcel ships, the order is marked Completed and the tracking number is added to it.

Pretty permalinks must be switched on (anything but "Plain" under Settings > Permalinks), and you can revoke the key at any time. See our WooCommerce fulfillment page, or the step-by-step WooCommerce dropshipping setup guide if you are building the store from scratch.

Any other platform

Export your orders as CSV or Excel and send them to us; they are fulfilled the same way, and we send the tracking numbers back.

Checklist before you switch it on

Every variant has its own unique SKU, with no duplicates and no blanks.
Your SKUs are mapped to the warehouse's stock.
Each shipping method in your store is mapped to a real shipping line with a delivery time you can keep.
In Shopify, the automatic fulfillment setting is right for your setup, so orders aren't marked fulfilled before anything ships. Our guide to Shopify automatic fulfillment explains which way to set it.
Only one system writes stock levels to your store; other apps that adjust stock are switched off.
Customer shipping emails are switched on and worded in your brand's voice.
You've placed one real test order and followed it all the way to tracking.

Signs your integration is broken

Paid orders don't show up in your warehouse account. Check whether the app was removed, the API key revoked or the SKU missing.
Orders stay unfulfilled long after the parcel left. Tracking isn't being written back; our guide to Shopify unfulfilled orders walks through the causes.
Store stock and warehouse stock disagree. Usually another app is writing stock, or a SKU differs between the two.
The same order arrives twice. Two integrations are pulling orders from one store.

How PackQuay helps

Connecting is free, and one account can hold several Shopify and WooCommerce stores, with orders from other platforms uploaded by file. Behind the connection is our own warehouse in Xinxiang, China: sourcing, a free inspection of 20% of each batch, branded packing and 30+ shipping lines. If you'd like a hand with SKU or shipping-method mapping before your first order, message your account manager on WhatsApp.

FAQ

What is ecommerce integration?

Connecting your online store to the systems behind it, such as fulfillment, stock records, shipping and accounting, so orders, stock levels and tracking numbers move between them automatically instead of being copied by hand.

Why is ecommerce integration important for online stores?

It removes the delay and errors of manual work. Orders reach the warehouse as soon as they are paid, the right variant is picked by SKU, stock levels stay accurate so you don't oversell, and customers receive tracking when their parcel ships.

Do I need a plugin to connect WooCommerce to PackQuay?

No. You create a Read/Write REST API key under WooCommerce, Settings, Advanced, REST API and send it to your account manager, who connects the store for you. You can revoke the key at any time.

How does PackQuay connect to Shopify?

We connect it for you: message us on WhatsApp and approve the connection from your Shopify admin. Paid orders then come in automatically, and tracking numbers are written back to Shopify once each parcel has physically left our warehouse.

Can I connect a store that isn't on Shopify or WooCommerce?

Yes. Send your orders as a CSV or Excel file and they are fulfilled the same way, with tracking numbers sent back to you.