The work that happens while you're asleep.

One click, from Amazon to live on eBay

The Chrome extension reads the source product — title, price, images, brand, bullet points, specifics. ArbiKey maps it to an eBay category, fills the item specifics, orders the photos so the highest-resolution image is the cover, and publishes through eBay's official Listing API.

• Official eBay API — no password sharing, no browser scripting
• Title trimmed to eBay's 80-character limit on a word boundary
• Pre-flight check catches blockers before you spend the listing
• Country from your registered address, currency and site from the marketplace

Your supplier sells out. Your listing doesn't.

When the supplier goes out of stock, ArbiKey sets that eBay listing's quantity to 0, and restores it when stock returns. It never ends the listing — ending one permanently destroys its sales history, its search ranking and everyone watching it. A zero-quantity listing stays alive and comes straight back.

Every safety limit is yours to set: how many consecutive readings must agree before anything moves, how stale data is allowed to be, how long to wait before touching the same product again, and how many products a single run may change. A practice mode records every decision without touching eBay, so you can read a week of the log before going live.

• Quantity to 0 — the listing is never ended
• Asymmetric confirmations: quick to pause, cautious to restore
• Certain-loss guard when supply cost meets or passes your eBay price
• Practice mode, decision log, and a cap on products per run

Automation is only as good as the figure it acts on

This is where ArbiKey differs from tools built to add listings quickly. Every automated decision is made against a real profit figure — the eBay final value fee for that item's exact category, the international fee, the ad rate, VAT and the day's ECB exchange rate. Not a flat percentage applied across the catalogue.

The same engine drives the free calculator, the per-order profit you read, and the guard that pulls a listing's quantity to zero. One number, everywhere.

• Per-category final value fee, not one blended rate
• International fee, ad rate, VAT and fixed fee handled separately
• Live ECB rate when listing and payout currencies differ

eBay's dropshipping policy is explicit: “Listing an item on eBay and then purchasing the item from another retailer or marketplace that ships directly to your customer is not allowed.” Through 2025 and 2026 eBay tightened enforcement considerably. One of the ways it catches this is tracking-number matching — the retailer uploads a tracking number to their order, you upload the same number to yours, and the match is flagged automatically.

The penalties are not a warning. Listings get removed, accounts get restricted, and a permanent suspension is exactly that: no appeal, payouts held, and every listing gone.

So ArbiKey automates everything around that step and stops at it. You place and receive the supplier order yourself. ArbiKey records the supplier order number and cost, keeps the profit maths honest, syncs the tracking you actually ship under, and keeps the listing's quantity in step with your supplier. What it never does is put a package from another retailer in front of your buyer with your name on it.

• No auto-ordering. ArbiKey never places an order at a retailer on your behalf
• No listing endings. Quantity drops to zero instead, so sales history and search ranking survive
• Your tracking, not the retailer's. ArbiKey syncs the tracking number you enter for the parcel you sent
• Official eBay API only. OAuth, no password sharing, no browser scripting against eBay

If your model is to have Amazon ship straight to your eBay buyer, ArbiKey is the wrong tool — and honestly, so is the model. Sourcing you handle yourself, or from a supplier who allows it, is what this is built for.

• It doesn't find products for you. ArbiKey picks up once you've decided what to sell. Product research and competitor scanning are not part of it today.
• It doesn't end listings. That's a deliberate design decision, not a gap — see stock sync above.
• Price monitoring needs the extension. Supply prices are read through your own browser session, which is what keeps them accurate for your region and Prime status. Order and stock sync are server-side and run regardless.
• Stock sync requires eBay's out-of-stock control to be switched on in your eBay account. If it's off, eBay ends zero-quantity listings itself.