Amazon Marketplace - Connect Your Store

This article is for whoever connects an Amazon store inside DropStream — a fulfillment provider (3PL) or a merchant who manages their own DropStream account. You’ll add the store through DropStream’s Add Connection wizard.

Amazon uses the Selling Partner API (SP-API), which authorizes through Amazon’s own sign-in (OAuth). There are no API keys, secrets, or “API user” to create — the only thing you choose in DropStream is the marketplace; access is granted by signing in to Amazon and approving DropStream.

What you’ll need

• A DropStream account you can sign in to.
• The Amazon marketplace the store sells in (for example, United States or United Kingdom).
• An Amazon Seller Central account with permission to authorize apps — used for the one-time authorization step. For 3PL setups, this is the merchant’s Seller Central account, and they authorize it themselves (see below).

How DropStream connects to Amazon

Which route you take depends on whose Seller Central account you’re connecting.

• If you manage your own DropStream account (merchant), you connect the store in the Add Connection wizard, authorizing Amazon yourself. Start at Choose the marketplace below.
• If you’re a fulfillment provider (3PL), Amazon requires the merchant to authorize their own Seller Central account, so there’s no Authorize button for you. You send the merchant a credential request first, and the connection wizard comes afterwards. See If you’re a fulfillment provider (3PL).

One connection per marketplace. Amazon authorizes access per-marketplace, so each marketplace needs its own DropStream connection, billed individually. For example, France (.fr) and Spain (.es) each require a dedicated connection.

Choose the marketplace

For the full walkthrough of the wizard’s four steps, see Add a Connection. This section covers only the Store Setup step.

1. In the Add Connection wizard, work through to the Store Setup step. Choose Create new store, give the store a Name, and select Amazon Marketplace as the Platform. The Amazon settings appear below.

2. Select the Marketplace this store sells in. DropStream supports the United States, Canada, Mexico, Brazil, the UK, and the EU, Middle East, India, and Asia-Pacific marketplaces, among others.

3. Click Authorize, sign in to Amazon Seller Central, and approve access for DropStream. The window closes and returns you to the wizard with the authorization applied.

If you’re a fulfillment provider (3PL)

You never enter Amazon credentials or choose the marketplace — the merchant does both on their own authorization page. Selecting Amazon Marketplace in the Add Connection wizard shows a notice instead of an Authorize button, pointing you here:

1. On the Connections page, click the arrow next to Add Connection, then click Request merchant credentials.
2. Select Amazon Marketplace as the Store platform, enter the merchant’s email, and click Send Invitation.
3. The merchant opens the emailed link, picks the Marketplace their store sells in, signs in to Amazon Seller Central, and approves access.
4. When the request reaches Ready to finalize on the Merchant Invitations page, click Finalize to run the connection wizard and authorize the warehouse.

For the full flow, including how to track and resend requests, see Request Merchant Credentials.

Import and fulfillment settings

Set these in the Store Setup step (the defaults suit most merchant-fulfilled setups):

Save the connection

When you’re done, click Add connection. (In a 3PL handoff, you save the connection at the Finalize step instead — see the handoff article above.)

Once the connection is added, continue with Configure SKUs, then confirm orders are flowing with Review Order Status.