Reseller Loop

All setups · Shipping, Orders

Three marketplaces, one pack list, zero apps to check before coffee

An AI gathers overnight orders from all three marketplaces into one list with big SKUs and photos, shown on a screen in your packing area. No more checking three apps.

What happened in our store

No more checking three apps in the morning; nothing missed across platforms

Time to set up
Two days of building, runs itself since
Cost
Free (a spare TV and a home computer)
Tools
Claude Code, eBay API, Nifty Auto Crosslister, Tailscale
Sells on
eBay, Poshmark, Depop

The problem

Three marketplaces, three apps, three places an order can hide. Early-morning packing means you want everything on one page before coffee.

The workflow

  1. Every hour the agent reads new eBay orders through the official API, and Poshmark and Depop sales from the crosslister's sales log.
  2. The pack list runs 5 AM to 5 AM so it matches when the seller actually pulls orders. Monday's list covers Friday 5 AM to Monday 5 AM.
  3. Each line shows the SKU in big type, the first listing photo, size, and where it sold. The SKU doubles as the shelf location.
  4. A "packed" tick per order lives only in the screen, nothing is written back to any marketplace.
  5. The same page runs on a TV in the packing room through a private network, so any phone or screen in the house can open it.

What happened

Orders are pulled from one list instead of three apps. Cross-platform sales that used to be noticed a day late show up within the hour.

For your store

Our honest estimate from running this. Your store and numbers will differ.

What you need
eBay API access, a computer that stays on, and someone who can run a script (an AI coding tool helps). A spare TV is optional.
First try takes
A weekend at least. It took us two days of building.
First step tonight
Write down where each marketplace shows new orders and what you need on a pick list: SKU, size, photo, where it sold. That is the plan for the build.
After a week
Even before building anything, a written morning routine. With the build, one list instead of three apps.

Tools in this one

  • Claude Code Agent that writes and runs code on your own computer. How most of the Beartooth tools were built.
  • eBay API Official way for your own software to read listings, orders and traffic. Browser bots are against eBay's terms; the API is not.
  • Nifty Auto Crosslister Crosslists eBay to Poshmark and Depop, relists on a schedule, logs sales.
  • Tailscale Private network so your phone and TV can reach tools running on a home computer.
Next setup