Connecting Marketplaces & Mapping SKUs
How to connect Amazon and Walmart, import your marketplace catalog, and map listings to your internal SKUs.
How multi-channel works in Carpe Inventory IQ
- Shopify connects automatically when you install the app. No extra setup needed.
- Amazon and Walmart are connected separately from the Channels page.
- Every marketplace starts in Read-Only mode — nothing gets pushed until you say so.
- SKU mapping links each marketplace listing to your internal SKU so inventory stays in sync.
Connecting your marketplaces
Each marketplace has its own connection method. Both take about 5 minutes to set up.
Amazon
OAuth (SP-API)- 1Go to Channels and click Add Amazon.
- 2You’ll be redirected to Amazon Seller Central to authorize the connection via OAuth.
- 3Sign in with your Amazon seller credentials and grant the requested permissions.
- 4You’ll be redirected back to Carpe Inventory IQ. The connection is active immediately.
Amazon connects in Read-Only mode by default. Carpe Inventory IQ reads your orders and FBA/FBM inventory but doesn’t push anything back until you enable Full Sync.
Walmart
API Key (Seller Center)- 1Log in to the Walmart Developer Portal and click My Account in the upper right.
- 2Select your login type: Marketplace (US, Mexico, Canada & Chile) if you sell on seller.walmart.com, or Marketplace (Canada) if you sell on seller.walmart.ca.
- 3After logging in, find My API Keys and copy your Client ID and Client Secret.
- 4In Carpe Inventory IQ, go to Channels and click Add Walmart.
- 5Paste your Client ID and Client Secret. Click Test Connection to verify, then Connect.
Like Amazon, Walmart starts in Read-Only mode. You control when to enable Full Sync.
Store your Client Secret securely — Walmart only shows it once. Carpe Inventory IQ encrypts your credentials when stored.
Mapping marketplace SKUs
Once a channel is connected, you need to tell Carpe Inventory IQ which marketplace listing corresponds to which internal SKU. This is called SKU mapping. Each channel has its own mapping page.
Import your marketplace catalog
Go to Channels → select your marketplace → Mapping. Click “Import Catalog” (or “Refresh Catalog” if you’ve imported before). This pulls all your marketplace listings into Carpe Inventory IQ and auto-matches any that share the same SKU code as your internal catalog.
Auto-matching is exact — if your marketplace SKU is “WIDGET-001” and you have an internal SKU “WIDGET-001”, they’ll link automatically.
Review auto-matched SKUs
After import, you’ll see a summary: total products, how many were auto-matched, and how many need manual mapping. Review the auto-matched ones to make sure they’re correct. You can unmap any incorrect matches.
Map remaining SKUs manually or via CSV
For SKUs that didn’t auto-match, you have two options. You can map them one at a time using the inline search on the mapping page — just type your internal SKU code and select the match. Or you can map them in bulk via CSV: export unmapped products, fill in the internal SKU Code column, and re-import.
Verify your mappings
Once all SKUs show a mapped status, your marketplace is ready. When orders come in from that channel, Carpe Inventory IQ knows exactly which internal SKU was sold and adjusts inventory across all channels accordingly.
CSV import reference
Each mapping page supports bulk import via CSV. Download the template from the mapping page, fill in the columns, and upload. The importer is flexible with column names — for example, “Walmart SKU,” “Seller SKU,” and “Channel SKU” all map to the same field.
| Column | Required | Description |
|---|---|---|
SKU Code | Yes | Your internal SKU code in Carpe Inventory IQ |
Walmart SKU | Yes | The seller SKU on Walmart (column name varies by channel) |
GTIN | Optional | UPC or GTIN barcode (optional, used for reference) |
The CSV template is channel-specific. Download it from each channel’s mapping page to get the correct column headers. Amazon uses “Amazon SKU” and “ASIN” instead of “Walmart SKU” and “GTIN.”
Frequently asked questions
Ready to connect a marketplace? Head to the Channels page.