February 2026

Amazon Selling Partner: New authentication method

We are updating the authentication method for the Amazon Selling Partner connector.

Previously, connections authenticated through Weld's shared OAuth application. Going forward, each connection must authenticate using credentials from your own Selling Partner API (SP-API) application.

New required fields:

  • Refresh Token -- generated during the authorization flow
  • Client ID -- from your SP-API application
  • Client Secret -- from your SP-API application
Amazon Selling Partner - Authenticate with Private app

Rollout timeline

Action required by April 30, 2026. Existing connections that have not been migrated to the new authentication method by this date will experience sync failures. Please migrate as soon as possible to avoid disruptions.

  • Effective now -- all new Amazon Selling Partner connections use the new authentication method.
  • By April 30, 2026 -- all existing connections must be migrated.

Prefer not to manage your own SP-API application? Authentication with Weld's shared OAuth is still available on a custom quote plan. to learn more.

Who needs to migrate

You must migrate if your existing Amazon Selling Partner connection authenticates using Weld's shared OAuth.

Connections that already authenticate using a private SP-API application do not require migration.

Prerequisites

Before starting the migration, make sure you have:

  1. A registered SP-API application -- Register a private application in Amazon Seller Central if you don't already have one.
  2. Client ID and Client Secret -- Available from your SP-API application's credentials page.
  3. Refresh Token -- Generated by completing the self-authorization flow for your application.

How to migrate

  1. Log in to your Weld workspace and go to Settings → Connectors.
  2. Select the Amazon Selling Partner connection.
  3. Click Configuration.
  4. Select Authenticate with Private app as the authentication method.
  5. Enter the Refresh Token, App Client ID, and App Client Secret from your SP-API application.
  6. Select the Region your Amazon account is registered in.
  7. Click Authorize to reauthenticate the connection.
  8. Trigger a test sync to confirm everything is working correctly.

For full setup instructions and data schema details, see the Amazon Selling Partner connector documentation.

New connectors

Amazon Attribution

A dedicated connector for Amazon Attribution metrics, separated from the standard Amazon Ads integration for better granularity.

Amazon Attribution documentation

ShipHero

Full ELT support for ShipHero including Orders, Products, Shipments, Inventory, and Warehouse operations (13+ streams).

ShipHero documentation

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