Skip to main content
Connecting your marketplace accounts enables ListAgent to publish listings directly, crosslist inventory across platforms, and track sales to prevent double-selling.

​
Integration Architecture: Direct API vs. Chrome Extension

ListAgent uses two distinct methods to integrate with selling channels depending on the platform’s API architecture:

​
Step 1: Open Marketplace Connections

  1. Log in to your ListAgent .
  2. Click the More dropdown menu in the top navig.
  3. Select **Connect Marke.
Open Connections Menu

Select 'Connect Marketplaces' from the 'More' dropdown menu

​
Step 2: Connect eBay (Direct API Integration)

Marketplaces Grid

The Marketplace Connections dashboard showing integration cards for supported channels

  1. Locate the eBay card and click the Connect eBay button.
Connect eBay Button

Click 'Connect eBay' to initiate direct OAuth authorization

  1. You will be redirected to the official eBay authorization page[cite: 5]. Sign in to your eBay seller account and approve ListAgent permissions.
  2. Once authorized, you will return to ListAgent. Confirm the eBay card displays a green Connected badge.
eBay Connected Status

eBay card displaying confirmed 'Connected' status and connected accounts

Important eBay Setup Prerequisites: Before you can publish listings to eBay through any third-party tool, eBay requires:
  • Business Policies: Active preset policies configured for Payment, Shipping, and Returns.
  • Inventory Location: At least one valid fulfillment address/location registered on your eBay account.

​
Step 3: Connect Other Marketplaces (Chrome Extension)

For Poshmark, Mercari, Depop, Vinted, Grailed, and Whatnot, crosslisting is handled via the ListAgent Crosslist Chrome Extension.
Add to Chrome

Install the ListAgent Crosslist browser extension from the Chrome Web Store

1

Install the Extension

Visit the Chrome Web Store, search for ListAgent Crosslist, and click Add to Chrome.
2

Sign in to Your Marketplaces

Open separate browser tabs and log in to your seller accounts on the platforms you want to connect (e.g., Poshmark, Mercari, Depop).
3

Authenticate in ListAgent

Navigate back to Connect Marketplaces in ListAgent[cite: 5]. Click Connect [Marketplace] on the relevant card. The extension will detect your active session and establish the bridge.
4

Enable Sales Tracking & Auto-Delisting

Toggle the Sales Tracking switch on each connected marketplace card[cite: 2, 5]. This allows ListAgent to detect when an item sells and automatically attempt to delist it across your other connected channels.

​
Monitoring Connection Health

Regularly check your Connect Marketplaces screen to ensure accounts remain authorized:
  • Green Connected Badge: The connection is healthy and ready for publishing.
  • Red Warning Banner (e.g., Unable to reach account): Your marketplace session expired. Click Reconnect while logged in to the marketplace in another tab to restore the link.

​
Troubleshooting Common Connection Issues

  • Marketplace Shows “Not Connected” After Authorization: Ensure third-party cookies and pop-ups are allowed in your browser, then retry the connection.
  • eBay Listings Fail Immediately Upon Publishing: Check your account settings to confirm that your default eBay Business Policies and Inventory Location are linked.
  • Chrome Extension Crosslisting Fails to Trigger: Verify that the extension is pinned, active, and that you are currently logged into the target platform in your browser.