Connect your data stream from the eBay Seller Hub’s Product Research tool — one of several sources SellThru uses to unlock deeper listing insights and strategic optimizations.

🔧 How It Works
- SellThru Server is a lightweight Python Flask app that runs locally on your machine, not in the cloud.
- eBay Research Helper extension communicates with it via
http://localhost:5001
. - It processes eBay cookies and raw XHR entirely on your device — only aggregate item data is sent to SellThru, never your cookie.
- You can audit the code, monitor activity, and shut it down any time.
🔎 What’s the Purpose?
SellThru Server is a lightweight backend that connects your account to eBay’s Research API, facilitating automatic Terapeak-style data for your listings.
Rather than manually researching listings through the normal overlay, SellThru will soon let you run the optimizer directly from the dashboard at SellThru.net. It will automatically pull the research data for all your active listings, analyze it, and save it to your account — so you only need to fetch it once.
This gives you full access to conversion-focused market data, without having to gather the data manually.
🛡️ Is it Safe?
SellThru was built with privacy and transparency first. The base browser extension runs entirely on your device — no signups, no tracking, and no data sent anywhere.
If you choose to use SellThru Server, you’ll need to sign up at SellThru.net so we can link your account and import metrics for your store’s listings automatically.
Your eBay session cookies are only used locally to query eBay’s Research API. Only aggregate item data is sent to SellThru — your cookies never leave your machine. You’re in full control over when the server is running.
By default, SellThru Server binds to 127.0.0.1:5001
and only accepts connections from your own device. It uses Python’s built-in Flask dev server, which is not meant for public hosting or handling large numbers of concurrent requests.
🚀 Getting Started
- Download the latest version using the button above.
- Unzip the file and run
python app.py
(or your preferred startup method). - Make sure it says
Running on http://localhost:5001
. - You’re good to go! The extension will automatically detect it.
🛠 Troubleshooting
- Make sure nothing else is using port
5001
. - If you see a warning in the extension popup, verify the server is running and that your browser allows local connections.
- Still stuck? Visit the Contact Page
SellThru Server is open-source and free to use with the SellThru Chrome Extension. Power up your eBay research — all locally, all securely.