eBay plugin for OpenClaw post

Author: monde

_posts/2026-03-31-i-built-an-openclaw-plugin.md

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+---
+title: "I built an OpenClaw plugin"
+date: 2026-03-31
+---
+
+<img src="/assets/images/openclaw-ebay-plugin-demo.webp" alt="OpenClaw eBay plugin demo" style="float: left; margin: 0 1em 1em 0;">
+
+I hate HTML forms in a browser. eBay listing forms are a particular offender —
+dropdowns, required fields, category trees. So I built an OpenClaw plugin for
+eBay and the Lobster handles all of it now, efficiently, through eBay's API.
+The animated image to the left is the sizzle reel of creating an eBay listing
+simply through chat and sharing images. A better one minute video, and the full
+six minutes of the interaction is referenced at the end of this post.
+
+eBay does have its own AI image scan to bootstrap a listing from a photo. It
+works, but it's baked into eBay's UI — a one-shot feature you can't build on.
+With the OpenClaw plugin, the knowledge about how to create a listing lives in
+code I own and can reuse. When eBay's API behaves unexpectedly or throws an
+edge case, the OpenClaw can heal itself and/or fix plugin code to work around
+it. A traditional fixed UX can't do that.
+
+Claude labor is just like human labor. Asking Claude to figure out how to do
+something from scratch is fine once, but inefficient the second time. You're
+paying to rediscover the same territory every time you run it.
+
+Moving that knowledge into a Skill is a step up. A Skill gives Claude a focused
+starting point for repeating a task. But a Skill is still guidance — Claude
+still has to reason through the specifics on each invocation, the same way a
+person who's done something before still has to think it through each time.
+
+Actions in an OpenClaw plugin go further. They encapsulate repeatable work
+against a third-party API so it doesn't have to be relearned on each run. The
+how is baked in.
+
+Better yet, a plugin can expose RPCs so other plugins — or the OpenClaw agent
+itself — can invoke those focused actions directly without having to relearn
+the task. The knowledge accumulates and stays useful across sessions instead of
+evaporating when the conversation ends.
+
+If you want to see it in action, here's a one-minute cut with the highlights of
+the eBay demo.
+
+<iframe width="560" height="315" src="https://www.youtube.com/embed/1lWGIxBFvWA" title="OpenClaw eBay plugin demo" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
+
+The full six-minute version shows the whole interaction — texting with The
+Lobster (aka biddy as it's known to me in Telegram) to build and refine an eBay
+listing through a plain chat exchange. It's slow: Biddy is sandboxed in a
+Docker container on my laptop, running Claude Opus 4.6, and every message is
+bouncing through my home connection to Telegram then out to AT&T and back. But
+that's not the point. Watch how the collaboration works — iterating on a
+listing just by chatting. I even write the box weight and dimensions on an
+index card and feed that to biddy to fill in the shipping details. This is
+extremely useful to record freehand when the package is on the scale. A huge
+time saver - if you know, you know.
+
+<iframe width="560" height="315" src="https://www.youtube.com/embed/olLAA9LXl_Y" title="OpenClaw eBay listing full demo" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
+
+I'm thinking about productizing this work, let me know if you are interested
+mikemondragon@gmail.com .