US→UK Product
Arbitrage Engine.
Find products proven on Amazon US that the UK is not served well on yet — before you commit a penny to stock. A research engine that screens, scores and gives you one plain verdict.
A research engine for solo founders running US→UK market arbitrage and private label.
From a category to a verdict, in one run.
Discover. Gate. Decide.
Discover US winners
Give it a product type. It pulls what is genuinely selling on Amazon US — proven by real review volume and rating, not one lucky listing.
Gate the UK in British English
It checks amazon.co.uk the way British shoppers actually search, so a product already selling here under a different name — blanket versus throw — is ruled out, not mistaken for a gap.
Read the verdict
You get a ranked shortlist that opens with an executive summary and one plain verdict: Open Gap, Gap — Validate, Marginal, or No UK Gap.
Two markets. One honest gap.
The engine turns scattered cross-border research into a consistent workflow: US proof, UK supply, demand timing and unit economics in one scored run.
US proof, measured
Ranks each US candidate by review volume and rating, so a proven seller outranks a hopeful one-review listing — products, not just categories.
Demand proofUK gap gate
Checks amazon.co.uk in British English and drops anything already established here, so a real gap is a gap — not a vocabulary mismatch.
Supply gapUS-vs-UK demand
Overlays Google Trends for both markets so you can see demand the US has proven and the UK is only beginning to show.
Demand signalLanded-cost margin
Turns a realistic UK selling price into the maximum factory price you can pay, so margin is decided before you brief a supplier.
Unit economicsA screening system, ready to run.
Portable Claude Code and Codex skill for the full US→UK arbitrage pipeline.
Discovery, UK-gap gate and weighted scorer scripts in plain Python (standard library only).
UK product-market-fit modules — Amazon reviews, Reddit, Google Trends and a landed-cost margin model.
Report, dashboard, shortlist and mind-map templates, each opening with an executive summary.
A starter category roster for autonomous what-should-I-look-at runs.
Executive summary
Every run opens with a verdict and the one reason behind it — decision first, detail after.
Ranked shortlist
Survivors ranked by a weighted gap score, so the strongest opportunity is at the top.
US-vs-UK demand
A dual-market Trends chart that shows where the UK is catching up to the US.
Margin model
A backward landed-cost calculation from UK price down to the factory ceiling.
Before you buy
Will it hand me a guaranteed winner?
No. It is a screening engine, not a winner generator. Its sharpest skill is ruling out saturated markets, so most runs honestly say no — and that is the result that saves you money.
Does it replace my judgement?
No. It surfaces candidates, demand and a first-pass gap; confirming a real opportunity still takes your call on sourcing, landed cost, UKCA and VAT.
Do I need to code?
No code-writing, but you should be comfortable following setup steps in Claude Code or Codex and adding your own API keys.
What happens after purchase?
Gumroad gives instant access. Open the folder in Claude Code, say set this up for me, add your keys, and point your first run at a specific product type.