SKU and ASIN matching
Every Shopify variant links to its Amazon SKU and ASIN before a single count moves.
The Problem
Amazon Sells Your Last Unit While Shopify Still Shows It in Stock
It starts when Amazon becomes a second storefront for the same stock. Orders land in Seller Central, FBA holds some units, and Shopify can't see either in time.
01 · Pending gap
Your connector skips Pending orders from Amazon until morning.
Pending orders reserve Shopify stock the moment they arrive.
02 · FBA stock
Your FBA stock sits where Shopify can't see it.
FBA counts show next to your own stock, each with a buffer.
03 · Lost returns
A return reaches your warehouse, but nobody restocks it.
Returns go back into stock only after a check.
04 · Two queues
Your team works two order screens and apologizes on Monday.
Marketplace orders land in Shopify with SKUs, ship-by dates, and tracking.
An Amazon order for your last blue medium lands at 10 p.m. It sits as Pending while Amazon checks payment, and your connector skips it until morning. Meanwhile, Shopify sells the same unit. Your FBA stock sits in a pool Shopify can't see. A return reaches your warehouse, but nobody restocks it. By Monday, you're refunding one buyer and apologizing to another.
We start by mapping where each unit lives: your warehouse, FBA, or both. Then we connect Shopify to Amazon's Selling Partner API. Pending orders reserve Shopify stock at once, and the full order arrives when Amazon releases the address. FBA counts show beside your own, and returns restock only after a check. Your team works one order queue instead of two.
Stock held at Pending
Units on unpaid Amazon orders are held back, so your Shopify store can't sell them twice.
FBA counts in view
Amazon's warehouse quantities appear next to your own stock, each with its own buffer.
One order queue
Amazon orders land in Shopify with SKUs, ship-by dates, and tracking sent back to Amazon.
Our Amazon Sync Process
From Account Audit to One Order Queue in Five Steps
You approve the SKU match, your stock rules, and the test results before anything touches your live listings. Amazon's own approvals are planned into week one.
We review your Seller Central account, listings, fulfillment mix, and recent oversells. You get the plan and a fixed price in writing. If Shopify's Marketplace Connect app already covers your case, we'll tell you before we quote.
What's Included
What You Get With an Amazon Shopify Integration
Every Shopify Amazon integration plan covers SKU matching, order import, stock sync, and tracking. Larger plans add FBA stock, fulfillment from FBA, new listings, returns, and more marketplaces.
Compare Options
DeveloperLook vs Marketplace Connect vs a Multichannel Tool
Marketplace Connect suits many Shopify sellers, and multichannel tools suit teams on many marketplaces. A custom Shopify integration with Amazon fits when your rules or systems outgrow both.
| Feature | DeveloperLookBest fit | Marketplace Connect | Multichannel tool |
|---|---|---|---|
| Upfront price | From $1,200, fixed | Free to install | Varies by vendor |
| Running cost | Hosting only | 1% per order after 50 | Monthly subscription |
| Mixed fulfillment | Custom routing rules | FBA and FBM, standard rules | Both, preset rules |
| Stock source | Shopify, ERP, or 3PL | Shopify stock | The tool's inventory |
| Setup time | 2 to 7 weeks | Hours to days | Days to weeks |
| Pending order holds | Stock reserved at once | Standard handling | Varies by tool |
| Launch testing | Test orders on live SKUs | You test it | You test it |
| Who owns it | You, with documentation | Shopify | The tool vendor |
DeveloperLook
Marketplace Connect
- Upfront price
- DeveloperLook: From $1,200, fixedMarketplace Connect: Free to install
- Running cost
- DeveloperLook: Hosting onlyMarketplace Connect: 1% per order after 50
- Mixed fulfillment
- DeveloperLook: Custom routing rulesMarketplace Connect: FBA and FBM, standard rules
- Stock source
- DeveloperLook: Shopify, ERP, or 3PLMarketplace Connect: Shopify stock
- Setup time
- DeveloperLook: 2 to 7 weeksMarketplace Connect: Hours to days
- Pending order holds
- DeveloperLook: Stock reserved at onceMarketplace Connect: Standard handling
- Launch testing
- DeveloperLook: Test orders on live SKUsMarketplace Connect: You test it
- Who owns it
- DeveloperLook: You, with documentationMarketplace Connect: Shopify
Projects We've Built
Ecommerce Projects We Have Built
A few of the ecommerce stores and apps we've shipped. Each one needed tidy SKUs and dependable order flows, which is where every Amazon sync starts.
Borna's General Hardware Ecommerce Website
- Retail
- E-commerce
- Website
Fuison Fashion Ecommerce Website and Dashboard
- Fashion
- Dashboard
- E-commerce
Sefinix Furniture Ecommerce Store and Dashboard
- Furniture
- Dashboard
- E-commerce
Havenly Furniture Ecommerce Website
- Furniture
- E-commerce
- Dashboard
What Our Clients Say
What Clients Say After Launch
Feedback from ecommerce teams we have built stores, integrations, and automation 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 Sellers Trust Us With Their Amazon Accounts
An Amazon mistake can cost a listing or an account health metric, not only a sale. These habits keep your account and your stock counts safe.
Stock reserved at Pending
Amazon keeps new orders in Pending until payment clears, per its Orders API docs. We hold those units back right away, so your Shopify store can't sell them twice.
Buyer data handled by the rules
Amazon puts buyer addresses behind a restricted role governed by its Data Protection Policy. We request that role properly and keep address data out of spreadsheets and inboxes.
Built on today's listing format
Amazon retired its XML and flat-file listing feeds on July 31, 2025. We build on the Listings Items API and the JSON feeds that replaced them.
Variation families mapped first
Amazon groups sizes and colors under a parent listing, with a variation theme set per product type. We map your Shopify options to that theme before anything publishes.
Live SKUs tested first
A handful of low-risk SKUs go live before the rest of your catalog. Problems surface in that small test, not across every listing you sell.
Your app, your keys
The SP-API app, code, and hosting are registered in your name, and the runbook comes with them. A new developer can pick it up without starting over.
Overview
How does a Shopify Amazon integration keep orders and stock in sync?
DeveloperLook builds Shopify Amazon integration for sellers on FBA, FBM, or both. We match SKUs, reserve stock as soon as an Amazon order arrives, import orders once Amazon releases them, and send tracking back. Projects start at $1,200, a seller-fulfilled sync takes 2 to 3 weeks, and the app is registered to you.
DEVELOPERLOOK
Project facts · Shopify Amazon Integration
- Service
- Shopify Amazon Integration (SKU matching, order import, stock buffers, FBA)
- Typical timeline
- 2 to 3 weeks for FBM, 4 to 7 weeks with FBA
- Platforms
- Shopify, Shopify Plus, and Amazon Seller Central (FBA or FBM)
- Built with
- Amazon SP-API, Shopify Admin API, Node.js, and PostgreSQL
- 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 $1,200 USD, fixed scope after a free account review
Reviewed 28 Sep 2026 by Saimul Islam
Good fit
Sellers shipping Amazon orders themselves
You fulfill Amazon orders from your own shelves, and someone still copies each one into Shopify to pick, pack, and print labels.
Brands mixing FBA and FBM
Your fast sellers sit in FBA while slower SKUs ship from your warehouse, and neither Shopify nor Amazon shows the full picture.
Stores outgrowing Marketplace Connect
You started a Shopify and Amazon integration with Marketplace Connect, but your 3PL, bundles, or buffers need rules beyond its standard settings.
Brands adding their catalog to Amazon
Your Shopify catalog has hundreds of variants, and you want them on Amazon without rebuilding each listing, barcode, and variation by hand.
Agencies with Amazon clients
Your agency runs a client's Shopify store, and they want an Amazon integration with Shopify built and supported under your brand.
Not a fit
Small, self-shipped catalog
Your catalog is small and you ship it all yourself. Shopify's Marketplace Connect app handles that for less than our $1,200 starting price.
Etsy or eBay instead
Your marketplace is eBay or Etsy, not Amazon. See our Shopify eBay Integration or Shopify Etsy Integration service instead.
Many channels, one count
Amazon is one of many channels, and Walmart, TikTok, and wholesale need the same count. Our Multichannel Inventory Sync service fits that scope.
Stock at a 3PL
Your stock lives with a 3PL, and Amazon isn't the bottleneck. Our Shopify 3PL Integration service connects your warehouse instead.
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 Amazon Integration
These are starting points in USD. Your final price depends on SKU count, your fulfillment mix, and marketplace count, and you get a fixed proposal after a free account review.
For sellers shipping Amazon orders themselves who want orders and stock handled in Shopify.
$1,200one-time, USD
- Free account review and SKU map
- Existing listings matched by SKU and ASIN
- Orders imported once Amazon releases them
- Stock reserved at Pending, with buffers
- Tracking sent back to Amazon
- 30 days of support
Recommended
For sellers mixing Amazon's warehouses with their own, including new listings.
$2,900one-time, USD
- Everything in Seller-Fulfilled Sync
- FBA stock counts shown in Shopify
- Shopify orders fulfilled from FBA stock
- New listings and variation families
- Returns and cancellations synced
- 60 days of support
For brands selling in several Amazon marketplaces that need settlements in their books.
$5,600one-time, USD
- Everything in Mixed Fulfillment Sync
- Up to 3 Amazon marketplaces
- Prices and currencies per marketplace
- Settlements posted to QuickBooks or Xero
- Failed-sync alerts and a status page
- 90 days of support
For Agencies
White-Label Amazon Builds for Ecommerce Agencies
Your client wants Amazon, and you'd rather not hire an SP-API specialist for one project. We build the integration behind your brand: SKU match, API work, test orders, and a handover your team can support.
How the partnership works
White label: your client only ever sees your brand
- Your client
- You, the agency
- DeveloperLook
Share the account
Send the client's store, Seller Central setup, FBA mix, and monthly order volume.
- Client needs
- You share the details
- Details received
Review and quote
You receive the SKU plan, launch dates, and one price you can resell.
- Scope and plan
- Proposal to resell
- Your quoteYOUR LOGO
Launch under your name
We build, run live test orders, and hand over docs carrying your brand.
- Done by our team
- Your brand on it
- Handed to your clientDone
Partner with DeveloperLookDelivered under your brand
Client stays yours
We work under your brand and talk to the client only through you.
Amazon access handled
We manage SP-API registration and restricted-role requests for your client's account.
One fixed price
Each client gets one price, set after the free account review.
Extra hands on demand
Add us for one launch or a full season of Amazon work.
The Right Technology for Your Project
Technology Stack
We connect Amazon's Selling Partner API to Shopify and the systems around it, with carrier tracking and alerts your team can see.
Shopify
Amazon
GraphQL
OpenAPI
UPS
FedEx
USPS
DHL
QuickBooks
Xero
Slack
Google Sheets
Node.js
PostgreSQL
AWS
Docker
FAQ
Frequently Asked Questions
Straight answers on stock sync, order import, cost, timelines, FBA, and when Marketplace Connect is enough.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
Inventory syncs from one source of truth, usually Shopify, to Amazon through the Listings Items API. Each sale on either side updates the other, minus a buffer you set per SKU. FBA stock works differently: Amazon owns those counts, so we read them into Shopify instead of overwriting them.
Amazon orders are pulled through the Orders API and created in Shopify once Amazon marks them Unshipped. Before that, an order sits as Pending while payment clears, and Amazon withholds the address. We reserve the stock at Pending, then create the Shopify order with SKUs, ship-by date, and an Amazon tag.
Custom Amazon integrations start at $1,200 for seller-fulfilled orders: SKU matching, order import, stock buffers, and tracking. Adding FBA stock, fulfillment from FBA, returns, and new listings costs $2,900. Up to 3 Amazon marketplaces, with settlements in your books, costs $5,600. Your fixed quote follows the free account review.
Expect 2 to 3 weeks for a seller-fulfilled sync, counted from your review call. FBA, new listings, or several marketplaces stretch it to 4 to 7 weeks. Amazon's review of restricted address access can add days we don't control, so we request it in week one while SKU matching runs.
A custom build wins when your rules outgrow standard settings: stock in a 3PL or ERP, bundles, or several marketplaces. Marketplace Connect is free for 50 synced orders a month, then 1% per order, capped at $99. Before paying for a custom Amazon integration, Shopify stores should try it first.
Yes, both fulfillment types run side by side, each with its own stock pool and buffer. Amazon ships FBA orders and owns those counts, so those orders land in Shopify already fulfilled. FBM orders come to your warehouse. Shopify orders can also ship from FBA through Multi-Channel Fulfillment, which suits slow sellers.
We prevent overselling with three layers: stock reserved on Pending Amazon orders, a buffer per SKU, and a scheduled count check. Shopify can hold Amazon-bound units in its reserved state, so they stop showing as available. If the check finds drift, it corrects the count and alerts your team.
Yes, for most catalogs, as long as each product has a barcode or a GTIN exemption. Amazon groups sizes and colors under a parent listing with a variation theme set per product type. We map your Shopify options to those themes, and anything that doesn't fit goes to a review list.
Cancellations sync as soon as Amazon reports them and release the reserved stock in Shopify. Returns depend on the channel: FBA returns go back to Amazon's warehouse, while FBM returns come to you and restock only after your team checks them. Refunds stay in Seller Central, with matching records in Shopify.
Yes, partly: your SP-API app needs its roles approved in Seller Central. Standard roles cover listings, orders, and FBA stock. Buyer addresses need the restricted Direct-to-Consumer Shipping role, which Amazon reviews under its Data Protection Policy. We prepare that request in week one, and the app stays registered to you.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
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