Get Auto

Build Your Own eBay Listing Generator From a Photo

If you resell, you’ve probably searched for a custom GPT for writing eBay listings — something that turns a photo of an item into a title, description, and price you can paste and post. Instead of hunting for the perfect tool, you can build your own in a few minutes and shape it around exactly how you sell.

Why build it instead of downloading one

There are plenty of options out there: a ChatGPT prompt for resellers, an eBayGPT Chrome extension, or a generic eBay AI tool that generates listings from photos. They work, roughly. But they’re built for a generic seller, not you — not your categories, not your voice, not the marketplaces you actually post to.

When you build your own in Auto, you get a personal mini-app (a “Frame”) that does exactly what you want. It’s camera-first: describe the listing style you like, snap a photo of the item, and Auto writes the listing. No code, no extension to configure, no settling.

Build it in Auto

  1. Open Auto and describe what you want in plain language — for example, “Take a photo of an item and write me a marketplace listing I can copy and paste.”
  2. Tell it what to include: title, condition, description, suggested price, and which platforms you post to (eBay, Facebook Marketplace, OfferUp).
  3. Snap a photo of an item and let Auto generate a draft.
  4. Tweak the wording or fields until listings come out the way you’d write them, then save the Frame and reuse it for every item.

That’s it — a listing generator tailored to your inventory, ready whenever you photograph something new.

How someone built theirs

One reseller wanted something simple: point the camera at an item they were selling, let the AI gather the product details, and get back a finished listing they could copy and paste straight into Facebook Marketplace or OfferUp.

So that’s what they described in Auto — a photo in, a ready-to-post listing out. The result was a Frame they named “Listing Maker.” No prompt-engineering, no extension setup. Just a tool that fit their exact workflow, built in minutes and reused every time they had something new to sell.

You can build the same kind of thing around your own categories and the platforms you actually use.

FAQ

Do I need to know how to code? No. You describe what you want in plain English and snap a photo. Auto builds the Frame for you.

Can it write listings for platforms other than eBay? Yes. Tell it which marketplaces you post to — eBay, Facebook Marketplace, OfferUp — and it’ll format the output so you can copy and paste anywhere.

How is this different from a ChatGPT prompt or a Chrome extension? Those are generic and one-size-fits-all. A Frame you build is yours: it captures your pricing style, your descriptions, and your platforms, and it starts from a photo instead of typing everything in.

Can I change it later? Yes. Reopen your Frame and adjust the fields or wording anytime your selling habits change.