3PL and Ecommerce Fulfillment Integrations
KSP connects your storefronts, marketplaces and back-office systems to one warehouse management system. Orders drop into the WMS, and tracking posts back to the channel that sold them. Inventory counts come from one pool, so every channel sells from the same numbers. Use a prebuilt connector, the open API, or EDI through our SPS Commerce partnership for retail trading partners.
- Prebuilt connectors + open API
- EDI via SPS Commerce
- 2 PM CST same-day cutoff for daily orders
Superfast integrations.
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What Does a 3PL Integration Connect?
A 3PL integration links the systems where you sell to the warehouse system that picks and ships. Four things move across it: orders into the warehouse, shipment confirmations and tracking back to the channel, inventory counts back to every storefront and marketplace, and inbound receipts so stock you sent is counted before it's sold.
Most brands don't sell in one place. A Shopify store, Amazon, Walmart and a wholesale account each want their own orders filled and their own tracking returned. Each also needs an available-to-sell number that doesn't oversell. A fulfillment integration keeps all of that on one inventory pool. You stop keying orders by hand and exporting spreadsheets, and the channels stop disagreeing with the warehouse about stock. On US 3PL rate cards, initial fulfillment integration averages $2,674 and EDI setup runs $1,472 per transaction, according to Armstrong & Associates' benchmark of 144 warehouse contracts, which our 3PL onboarding cost figures break out. Daily orders then run through standard ecommerce fulfillment.
Storefront, Marketplace and Back-Office Integrations
These are the platforms KSP's Logiwa WMS connects to today. Each card names the connection path. Not listed? Most systems can reach the WMS through the open API or EDI. Ask before you rule a 3PL out.
Storefront
Shopify / Shopify Plus
Prebuilt connector
Storefront
BigCommerce
Prebuilt connector
Storefront
WooCommerce
Prebuilt connector
Storefront
Magento / Adobe Commerce
Prebuilt connector
Storefront
Salesforce Commerce Cloud
Connector
Storefront
Squarespace
Prebuilt connector
Storefront
Shift4Shop (3dcart)
Connector
Storefront
Ecwid
Connector
Marketplace
Amazon
Prebuilt connector
Marketplace
Walmart Marketplace
Prebuilt connector
Marketplace
eBay
Prebuilt connector
Social marketplace
TikTok Shop
Prebuilt connector
Retail channel
Target
Prebuilt connector
Retail channel
Macy's
Prebuilt connector
Wholesale marketplace
Faire
Prebuilt connector
ERP
NetSuite
Connector
Accounting
QuickBooks
Connector
Order management
Extensiv (Skubana)
Prebuilt connector
Shipping software
ShipStation
Connector
Drop-ship network
CommerceHub
Connector
CRM + ecommerce
Keap
Connector
EDI network for retail trading partners
SPS Commerce
EDI partnership
Parcel carriers
FedEx, UPS, USPS
Prebuilt connector
Custom or headless build
Your own system
Open API
How Orders, Tracking and Inventory Move Between Your Store and KSP
Five handoffs, the same for every channel. Sync timing depends on the connector and is confirmed per platform during onboarding.
- 01
Order drops in
A paid order leaves your storefront or marketplace and lands in the WMS with its SKUs, ship method and address. EDI purchase orders arrive the same way through SPS Commerce. - 02
Checked against your SKU map
The WMS matches each line to a stocked SKU. Unknown SKUs, unmapped bundles or out-of-stock lines are held for correction instead of shipping wrong. - 03
Picked, packed and shipped
The order is picked with scan verification, packed, weighed and rate-shopped across carriers. Daily orders received by 2 PM CST ship the same day. - 04
Tracking posts back
The shipment confirmation and tracking number return to the channel that sold the order, so the customer's shipping email goes out from your store. - 05
Inventory syncs to every channel
On-hand counts update from the one pool. Receipts from inbound shipments add stock once they're counted, not when the truck is booked.
Connector, Open API or EDI: Which Integration Path Fits
The platform decides most of this. Where you have a choice, this is the trade-off.
| Path | How it works and when it fits | Watch for |
|---|---|---|
| Prebuilt connector | KSP's WMS connects to your storefront or marketplace account directly. Fits Shopify, BigCommerce, Amazon, Walmart, TikTok Shop and the other platforms listed above. Fastest to launch. | Connectors move standard order fields. Custom fields, gift notes and bundle logic need mapping before go-live. |
| Open API | Your developers or your ERP call the WMS API to send orders and pull shipments and inventory. Fits custom or headless builds and ERPs without a connector. | You own the build and the error handling on your side. Agree who watches for failed calls. |
| EDI via SPS Commerce | Retail purchase orders, advance ship notices and invoices move in each retailer's required format through KSP's SPS Commerce partnership. Fits brands selling to big-box and department-store trading partners. | Each retailer has its own document set and labeling rules, so test with each partner before the first live PO. See how EDI fulfillment works with SPS Commerce. |
New to EDI? Start with what EDI is and how it works.
What the WMS Checks After an Order Lands
A clean integration gets the right order to the warehouse. Accuracy on the floor gets the right item into the box. These are the checks between the two.
On every order
- 1
Identify the tote
The associate scans the tote barcode so the pick is tied to the right container. - 2
Verify the item
The unit barcode is checked against what the WMS expects. A mismatch does not register and has to be corrected before the workflow continues. - 3
Measure the packed carton
Cartons pass certified scales and dimensioners before labels print. Measured weight and dimensions feed the manifest and multi-carrier rate shopping.
Less travel. More time for verification.
135+ Locus AMRs move order containers through picking, cutting associate travel so time goes to picking and verification. See how KSP brought robotics onto the floor.
- order accuracy
- 99.999%
- Locus AMRs on the floor
- 135+
- Same-day cutoff for daily orders
- 2 PM CST
Orders run through KSP's Logiwa WMS at its FDA-registered facility in Brooklyn Park, MN: a ~225,000 sq ft building with 29 dock doors.
What to Have Ready Before You Connect
Integrations launch on schedule when the data is clean on day one. Pull these together before onboarding starts.
- ✓A full SKU list with barcodes (UPC or your own), matching what your storefronts sell
- ✓Bundle and kit definitions: which storefront SKUs ship as multiple components
- ✓Every sales channel and account that will send orders, including wholesale and marketplaces
- ✓Ship-method mapping: what "Standard", "Expedited" and free shipping mean for carrier service
- ✓Order rules: holds, fraud review, gift notes, inserts, split shipments
- ✓Retail trading partners that require EDI, with their routing guides and label specs
- ✓Returns flow and where refunds and restocks should be recorded
- ✓Your target go-live date and the inventory you'll send first
Missing some of this? That's normal. SKU mismatches and unmapped bundles cause most launch-week errors, so they're mapped with you during onboarding before live orders flow.
3PL Integration FAQ
Does KSP integrate with Shopify, Amazon and Walmart?
Yes. Shopify and Shopify Plus, Amazon and Walmart Marketplace connect to KSP's Logiwa WMS through prebuilt connectors. So do BigCommerce, WooCommerce, Magento / Adobe Commerce, eBay, TikTok Shop and Faire. NetSuite, QuickBooks, CommerceHub and ShipStation connect too. The full list is in the platform section above.
How long does it take to set up a 3PL integration?
Connector setups are the fastest. A simple Shopify connection can take as little as 20 minutes! Custom API builds and EDI depend on the complexity, but KSP has an in-house tech team that can handle most builds in under a week. Most time goes into SKU and bundle mapping, not the connection itself.
Most 3PLs take 1-12 weeks to get connected. KSP Fulfillment, on the other hand, has an in-house tech team with processes that are able to integrate your systems very quickly, sometimes in as little as 20 minutes.
My platform isn't listed. Can you still connect?
Usually. If your platform has no connector, the WMS open API or EDI can carry orders, tracking and inventory. Tell us the platform and how it exports orders, and we'll confirm the path before you commit.
Can I sell on several channels from one inventory pool?
Yes. Every connected channel draws from the same on-hand count, so stock is held once and each storefront shows the same availability.
How often does inventory sync?
It depends on the connector. Timing is confirmed per platform during onboarding.
Can I see my orders and inventory?
Yes. KSP clients log into an online portal to see orders, inventory and shipment status.
Do you support EDI for retailers?
Yes, through KSP's partnership with SPS Commerce. Purchase orders, advance ship notices and invoices move in each retailer's format. How EDI fulfillment works with SPS Commerce.
Can the integration capture serial or lot numbers?
Where your product needs it, serial and lot numbers are scanned in the WMS. Details are in 3PL serial number tracking.
Scope your integration with KSP
Integrations launch on schedule when the data is clean on day one. Pull these together before onboarding starts.
Not sure what you're running? A list of where you sell is enough to start.