Moriarty Services
View full metrics directly on the eBay Seller Hub’s Product Research page — giving you insight into which listing conditions convert buyers, beyond the basic market data eBay provides.
What It Does
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Neatly displays all existing eBay Research metrics and derivatives in structured, easy-to-read groups -
Surfaces additional insights by capturing and enriching live eBay research data from the XHR -
Encourages deeper, more informed decision-making while conducting product research -
Instantly export all metrics as JSON for backup, tracking, or long-term analysis -
Integrates with the SellThru Server for advanced, AI-powered listing optimization
Live Previews
Optional: SellThru Server
Unlock the full power of research and optimization by pairing the extension with SellThru.net. This companion system adds deeper insight and automation features such as:
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Historical STR trends and category performance scoring -
Automatic buyer interest patterning, tagging, and token analysis -
Data caching to reduce load times and enable faster research -
AI-powered title optimization using proprietary listing context and buyer sensitivity scoring
SellThru Server Instructions →
The SellThru.net Listing Optimizer includes a free tier that gives you 25 optimized listings per month — plus 5 more each day — making it easy to try before upgrading.
Try It Now
FAQ
Is this extension free?
Yes. The eBay Research Helper extension is completely free to use, with no ads or trackers. For advanced features like listing optimization, arbitrage tools, and cross-platform support, you can optionally pair it with the SellThru Server.
Does it work on Firefox?
Not yet. The extension is built using Manifest V3, which Mozilla hasn’t fully supported yet. It works on all Chromium-based browsers like Brave, Edge, and Opera.
What marketplaces are supported?
Currently: eBay.com. International support and multi-platform features are in active development.