Connect Amazon Seller Central to Unified.to

Updated:

May 13, 2026

What this integration covers

AreaUnified objectsTypical use
E‑Commercecommerce_item, commerce_collection, commerce_inventory, commerce_saleschannelCatalog, product types, FBA inventory summaries, marketplace participation
Accountingcommerce_account, accounting_salesorder, accounting_contactOrders and related account/contact style data from SP-API
Metadatametadata_metadataCustom / structured metadata mapping where supported
Exact read/write support follows your workspace permissions and the integration's object support matrix in the Unified app.

Prerequisites (Amazon side)

  1. Active Seller Central account for the marketplaces you care about.
  2. SP-API developer registration — create and configure a Selling Partner API application in the Amazon developer / SP-API flow. Please follow this guide: https://developer-docs.amazon.com/sp-api/docs/registering-your-application
    image.png
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    Put the redirect_url as shown here: https://app.unified.to/integrations/amazonsellercentral?tab=oauth2
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  3. LWA (Login with Amazon) security profile linked to that application so you obtain:
  • LWA Client ID
  • LWA Client Secret
  1. Marketplace ID(s) for each marketplace (e.g. US). Reference: Marketplace IDs.
  2. Correct region for the SP-API endpoint you will use (see below).

NOTE: Amazon's SP-API documentation also describes IAM users/roles and request signing for many operations. Follow Amazon's current SP-API onboarding for your app (including any IAM / signing requirements Amazon still enforces for certain endpoints). If calls fail with auth errors, verify the app's SP-API roles and Amazon's latest auth requirements.

Choose the SP-API region (must match your selling region)

When connecting, pick the environment that matches where you sell (this selects authorize URL and SP-API base URL):

RegionHost
North AmericaSeller Central host : .com
EuropeSeller Central host : .co.uk
Far EastSeller Central host : .co.jp

Connect in Unified (step-by-step)

  1. Open Integrations (or your product's connection UI) and activate Amazon Seller Central.
  2. Enter OAuth app credentials from Amazon (LWA Client ID and Client Secret) in the fields your Unified workspace uses for this integration (same pattern as other OAuth2 apps).
  3. Set Marketplace ID in the field Unified uses as the developer / connection key for this integration (labeled as Marketplace ID in vendor config).
  4. Select the correct regional URL (North America vs Europe vs Far East) so authorize and API hosts align with your seller account.
  5. Start OAuth — you will be sent to Seller Central to approve the app (/apps/authorize/consent).

Sandbox

Amazon documents an SP-API sandbox: https://app.unified.to/integrations/amazonsellercentral?tab=partnership Use it if you are testing before production seller data.

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