Spec review and field map
Your provider's API, EDI guide, or file layout mapped field by field before any code is written.
The Problem
When Shopify and Your 3PL Disagree, Customers Find Out First
It starts small: a tracking number a day late, a SKU that shows in stock but isn't. By your peak season, those gaps cost refunds and reviews.
01 · Missing tracking
Friday's shipments reach customers without tracking in Shopify.
Tracking comes back with the carrier as each order ships.
02 · Oversells
Your site shows stock after the shelf ran empty.
Stock counts post to Shopify as receipts, shipments, and returns arrive.
03 · Daily CSVs
Someone uploads a CSV to the provider's portal every afternoon.
Each paid order goes to your warehouse within minutes.
04 · Sick days
When that person is out, orders just sit.
An hourly check names any order your warehouse didn't get.
Monday morning, your inbox is full of "where is my order?" emails. Your warehouse shipped those orders on Friday, but the tracking numbers didn't reach Shopify. Then a best seller keeps showing stock on your site after the shelf ran empty, and the weekend's oversells turn into refunds. Someone still uploads a CSV to the provider's portal each afternoon. On the day they're out sick, orders just sit there.
We start with your provider's spec: its API, EDI guide, or file layout. Then we build a 3PL fulfillment integration for Shopify that sends each paid order within minutes. Tracking comes back with the carrier, and stock updates as soon as the warehouse reports it. An hourly check names any order that went missing. Problems surface in your Slack channel, not in your reviews.
Built to your provider's spec
API, EDI, SFTP, or CSV: we connect the way your warehouse partner already works.
Stock that matches the shelf
Counts post to Shopify's on-hand field as receipts, shipments, and returns come in.
Missing orders caught hourly
An hourly match of sent and confirmed orders flags any order your warehouse didn't get.
Our Shopify 3PL Integration Process
From Free 3PL Review to Live Sync in Five Steps
The field map, routing rules, and alert settings get your sign-off before any build, and real test orders prove each one in your warehouse.
We go through your provider's API docs, EDI guide, or file specs and your order flow. You get a plain summary of what can sync and whether their app already covers it.
What's Included
What You Get With Our 3PL Integration Solutions
A field map built from your provider's spec, order release, tracking and stock sync, returns, routing, and checks that catch a missing order early.
Compare Options
DeveloperLook vs Built-In 3PL Apps vs CSV Uploads
A built-in 3PL app or a daily CSV works for simple setups. Here's where each one stops and a custom connection pays off.
| Feature | DeveloperLookBest fit | Built-in 3PL app | CSV uploads |
|---|---|---|---|
| Time to launch | 2 to 9 weeks | Hours to days | Same day |
| Upfront cost | From $1,050 | Often included | Staff time only |
| Custom rules | Any rule you need | App settings only | Staff memory |
| Several providers | One shared rule set | One app each | One file each |
| Stock updates | As soon as reported | App schedule | Each upload |
| Failure alerts | Alert per order | Varies by app | When customers ask |
| Returns | Restocked in Shopify | Some apps | By hand |
| Ownership | Your code and accounts | App vendor terms | Your spreadsheets |
DeveloperLook
Built-in 3PL app
- Time to launch
- DeveloperLook: 2 to 9 weeksBuilt-in 3PL app: Hours to days
- Upfront cost
- DeveloperLook: From $1,050Built-in 3PL app: Often included
- Custom rules
- DeveloperLook: Any rule you needBuilt-in 3PL app: App settings only
- Several providers
- DeveloperLook: One shared rule setBuilt-in 3PL app: One app each
- Stock updates
- DeveloperLook: As soon as reportedBuilt-in 3PL app: App schedule
- Failure alerts
- DeveloperLook: Alert per orderBuilt-in 3PL app: Varies by app
- Returns
- DeveloperLook: Restocked in ShopifyBuilt-in 3PL app: Some apps
- Ownership
- DeveloperLook: Your code and accountsBuilt-in 3PL app: App vendor terms
Projects We've Built
Ecommerce Projects We Have Built
Shopify and ecommerce builds we've shipped for clients, with the order, stock, and fulfillment data running behind the storefront.
Glamory Beauty & Makeup Ecommerce App and Dashboard
- Beauty
- Fashion
- E-commerce
Modeverse Ecommerce Web Design & Development
- Fashion
- Retail
- E-commerce
Havenly Furniture Ecommerce Website
- Furniture
- E-commerce
- Dashboard
UrbanNest Furniture Ecommerce App and Admin Dashboard
- Business
- Furniture
- E-commerce
What Our Clients Say
What Clients Say After Launch
Feedback from ecommerce teams we have built order and fulfillment integrations for.
We had a different kind of problem. People were visiting the store, adding products to their carts, and then disappearing before they finished the order. We had tried a few apps and made changes here and there, but nothing really seemed to solve the bigger issue. The team went through the shopping experience with us and pointed out things we hadn't really noticed ourselves. They cleaned up the cart and checkout flow, made the mobile experience much smoother, and helped us make the store feel easier to shop. I’m not going to pretend we fixed everything overnight, but it finally feels like the store is helping the sale instead of getting in the way of it.
The mobile experience is probably my favourite part of the new site. We had spent a lot of time making sure the desktop version looked right, and the team kept pushing us to think about how everything would actually feel on a phone too. They were right. The navigation is clean, the interactions feel natural, and everything we’ve tested so far works exactly as it should. They also went through the links, forms, integrations, and other details more than once before launch, which I really appreciated. And even after going live, we could still reach out when something came up. The whole process felt friendly, organised, and surprisingly straightforward.
We had a pretty specific idea of what we wanted our website to become, but I wasn’t sure how easily we could explain all of it to a development team. There were quite a few moving parts, and we were working toward a deadline, so I expected a few things to get lost along the way. That never really happened. They understood what we were trying to achieve, kept us updated throughout the process, and got everything ready within the agreed timeline. The final site feels much easier to navigate, works beautifully on mobile, and is noticeably smoother for our customers. It was a huge relief seeing the original idea actually turn into the website we had in mind.
1,000+
Projects shipped
10+
Years of experience
Top 3%
Upwork Top Rated Plus
5 stars
Average review score
Work Culture
Why Growing Brands Trust Us With Their 3PL Data
A warehouse connection fails quietly unless someone plans for it. These habits keep your orders moving and your stock honest.
Stock written to the right field
We post your warehouse's shelf count to Shopify's on-hand field, which counts units held for open orders. Written to available, those units sell twice.
Every order matched hourly
Each hour we compare new Shopify orders with what your warehouse confirmed. A missing order becomes an alert, not a customer email.
Routing decided before release
Shopify won't move an order to another location once a provider has the request. So routing runs first, and each order reaches the right warehouse the first time.
Cutovers planned to the hour
When you switch providers, we switch at an agreed order cut-off. Each order ships from one warehouse, and none get stranded between the two.
Built-in apps checked first
Plenty of providers offer a solid Shopify app. If yours covers your orders, stock, and returns, we'll tell you before we quote.
Your code, your accounts
The code, the runbook, and every service account stay in your name. Any developer can read the runbook and take over.
Overview
How does a Shopify 3PL integration move orders, stock, and tracking?
DeveloperLook builds Shopify 3PL integration that sends each paid order to your 3PL and brings tracking, stock, and returns back. We connect by API, EDI, or SFTP files, add routing across warehouses, and run an hourly order match. Projects start at $1,050, take 2 to 9 weeks, and we'll tell you if your provider's own app already covers it.
DEVELOPERLOOK
Project facts · Shopify 3PL Integration
- Service
- Shopify 3PL Integration (orders, tracking, stock, returns, routing)
- Typical timeline
- 2 to 9 weeks, depending on data method and warehouse count
- Platforms
- Shopify and Shopify Plus, any 3PL, plus your ERP or accounting
- Built with
- Shopify GraphQL Admin API, webhooks, Node.js, EDI X12, and SFTP
- Experience
- 10+ years of development experience and 1,000+ shipped projects
- Post-launch support
- 30 to 90 days, depending on plan
- Communication
- Calls in US, UK, and AU business hours
- Starting price
- From $1,050 USD, fixed scope after a free 3PL review
Reviewed 28 Sep 2026 by Saimul Islam
Good fit
Stores whose 3PL has no Shopify app
Your 3PL takes orders by EDI or a CSV on SFTP, and someone on your team uploads that file daily.
Brands fighting phantom stock
Your store shows a best seller in stock while the warehouse shelf is empty, and each oversell ends in a refund.
Brands adding a second warehouse
You're opening a West Coast warehouse with a new provider, and orders must split by region automatically.
Stores switching 3PLs
Your fulfillment contract ends next quarter, and the new provider needs orders, stock, and returns connected by cutover.
Agencies whose clients use 3PLs
Your client's warehouse connection keeps failing, and you need someone who reads EDI specs to fix it under your name.
Not a fit
Self-shipping with ShipStation
You pack and ship orders yourself with ShipStation. Our Shopify ShipStation Integration service fits that and costs less.
Your own WMS
You run your own warehouse on warehouse management software. Our WMS Integration service connects the systems you control.
Full ERP rollout
You need the 3PL connected inside a full ERP rollout with purchasing and finance. Our Shopify ERP Integration service covers that.
Provider's app works well
Your 3PL's own Shopify app already handles orders, stock, tracking, and returns well. Keep it, and skip our $1,050 build.
Not sure we're the right fit?
Send a two-line brief. We'll tell you honestly whether we're the right team.
Pricing
Transparent Starting Prices for Shopify 3PL Integration
These are starting points in USD. Your final price depends on the data method, warehouse count, and returns handling, and you get a fixed proposal after a free 3PL review.
For stores with one 3PL that offers a documented API and one warehouse.
$1,050one-time, USD
- Free 3PL review and field map
- Orders out, tracking back
- Stock synced to the on-hand count
- Hourly order match with alerts
- Test orders through pick and ship
- 30 days post-launch support
Recommended
For 3PLs that trade EDI or SFTP files, or setups with up to 3 warehouses.
$2,600one-time, USD
- Everything in Single 3PL Sync
- EDI 940, 945, and 846 or SFTP files
- Routing across up to 3 warehouses
- Returns restocked in Shopify
- Retry queue and failed-order alerts
- 60 days post-launch support
For brands running several 3PL providers that need one set of routing rules.
$5,400one-time, USD
- Everything in EDI and Multi-Warehouse
- Up to 3 providers and 6 warehouses
- Routing by stock, region, and product type
- 3PL invoice checks against shipped orders
- Sync health dashboard
- 90 days post-launch support
For Agencies
White-Label 3PL Connections for Agencies and Studios
You own the client relationship. We supply the 3PL software integration services: spec reviews, order and stock sync, EDI mapping, and routing. Your client deals only with your team, and you receive the code and runbook.
How the partnership works
White label: your client only ever sees your brand
- Your client
- You, the agency
- DeveloperLook
Share the brief
Send the client's provider spec, order volume, and deadline for a first read.
- Client needs
- You share the details
- Details received
We scope and price
You receive a fixed quote plus a field map your client can review.
- Scope and plan
- Proposal to resell
- Your quoteYOUR LOGO
Build and hand off
We build it, run real test orders, and deliver the code and runbook.
- Done by our team
- Your brand on it
- Handed to your clientDone
Partner with DeveloperLookDelivered under your brand
Stay client-facing
You run the client calls while we build behind the scenes.
Predictable delivery
Fixed scope per 3PL connection, so the quote you give your client holds.
EDI and API depth
Engineers who have mapped 940 and 945 files and warehouse APIs.
Flexible capacity
Start with one connection and add more as clients add warehouses.
The Right Technology for Your Project
Technology Stack
We build on Shopify's GraphQL Admin API and whatever method your warehouse partner uses: a REST API, EDI documents, or files on SFTP.
Shopify
GraphQL
Node.js
Python
UPS
FedEx
USPS
DHL
- NetSuite
SAP
Microsoft Dynamics 365
QuickBooks
Xero
AWS
PostgreSQL
Docker
Slack
Google Sheets
FAQ
Frequently Asked Questions
Straight answers on how 3PL connections work, cost, timelines, EDI and file-based 3PLs, and stock mismatches.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
The integration passes each paid order to your 3PL and brings the shipping results back. Shopify assigns the order to your provider's location, and the connection sends it by API, EDI, or file. After packing, the warehouse returns the carrier and tracking number, and Shopify emails your customer.
Your orders go out on Shopify webhooks, and tracking comes back through Shopify's fulfillment API. A provider set up as a fulfillment service accepts each request, then posts one fulfillment per package with carrier, number, and link. Shopify's own tracking poll runs hourly, which is slow, so we push each update as it happens.
A custom 3PL integration for Shopify starts at $1,050 for one API-based provider. That covers orders, tracking, stock, and 30 days of support. EDI or file-based setups, or up to 3 warehouses, cost $2,600. Several providers under one set of routing rules cost $5,400. A free spec review sets your fixed quote.
One API-based provider goes live 2 to 3 weeks after the free review. EDI or file-based setups and multi-warehouse routing take 4 to 6 weeks, largely because your provider's EDI team runs its own testing round. Several providers with shared routing take 7 to 9 weeks, with test orders at each warehouse.
Most mismatches come from timing and from writing your 3PL's count to the wrong Shopify field. Shopify's on-hand count includes units committed to open orders, so posting the shelf count as available sells those units twice. Other causes: SKUs that differ between systems, returns restocked but not reported, and stock checks that run only hourly.
Yes, one Shopify store can route orders to several 3PL warehouses. We set up each warehouse as its own Shopify location, so your stock and reports stay separate. Routing rules pick the warehouse by stock, region, or product type first, because Shopify won't move an order once the 3PL has the request.
Yes, many established providers work through EDI or files, and we connect to them directly. For EDI, we map your 940 warehouse shipping order, the 945 shipping advice, and the 846 inventory advice. For SFTP or CSV, we agree on file layouts, drop times, and error files with their team first.
Your orders wait in a queue, so they aren't lost. Shopify resends a webhook up to 8 times over 4 hours when delivery fails, and our connection keeps its own queue that replays anything rejected. The hourly order match compares new Shopify orders with what the 3PL confirmed, so a gap raises an alert fast.
Yes, and we start by finding exactly which orders fail and why. We compare 30 days of Shopify orders with your warehouse's records and check your webhook subscriptions, since Shopify removes ones that keep failing. Patterns like bundles or edited orders show up fast. Then we fix the cause and add the hourly order match.
You get 30 to 90 days of support, depending on plan. It covers fixes, Shopify API version updates, and changes when your provider revises its spec. Later work, like a new warehouse or a second provider, gets its own fixed quote. The code, runbook, and every account stay in your name.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
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