ReviewLoop is a published application on the Amazon Selling Partner Appstore, so there's nothing to register, no developer account to apply for, and no credentials to copy anywhere. You approve ReviewLoop from inside Amazon, and Amazon hands the connection back to us directly.
In ReviewLoop, open the Amazon connection tab and click Connect with Amazon.
That takes you to Amazon's own authorisation screen, where you'll be asked to confirm you want to give ReviewLoop access. Approve it, and Amazon returns you straight back to ReviewLoop with the connection already in place.
If you're not already signed in to Seller Central, Amazon will ask you to sign in first. Use the account owner's login — Amazon only lets the primary user authorise an application.
Selling in South Africa, India or the Middle East? Those stores have their own Seller Central rather than sharing Europe's, so do step 2 first — the Connection tab tells you which one you'll be sent to, and it follows whichever marketplaces you've picked.
Open Settings and pick the region you sell in, then tick each marketplace you actively sell on. Amazon's regions aren't quite geography: the one labelled Europe, Middle East, Africa & India covers Amazon.co.uk and Amazon.de alongside Amazon.co.za, Amazon.in and Amazon.ae. One connection covers every marketplace within a single region, so selling in both the UK and South Africa is fine on one connection — but selling in both the UK and the US needs a separate connection for each.
Then set days after order. This is how long ReviewLoop waits after an order before asking for the review. Fourteen days is a sensible default: long enough that the item has usually arrived and been used, while comfortably inside the window Amazon allows.
Open Billing and add a card. Your first 100 review requests are free, and nothing is charged until you've used them — after that it's 2p per request that actually sends, with no monthly fee and no minimum.
Billing has to be set up before anything sends, even while you're still inside the free allowance.
ReviewLoop runs once a day from here on. Each run looks for orders that reached your chosen age, asks Amazon which of them are still eligible, and triggers Amazon's official review request for each one that qualifies.
Your dashboard shows what was sent, skipped and failed each day, and you'll get a short summary email on Mondays. You can pause sending at any time from Settings without losing your connection or settings — nothing sends while paused, so nothing is charged.
"Connect with Amazon" doesn't complete. Amazon's authorisation links expire after a few minutes. If you started the process and left it sitting, go back to the Connection tab and start again from the beginning rather than reusing the old tab.
Amazon doesn't recognise your account when you sign in. You're almost certainly on the wrong Seller Central. Several stores — South Africa, India, the UAE, Ireland, Poland and others — have their own, separate from the shared European one. Pick your marketplaces in Settings, and the Connection tab will send you to the right one.
You're not the account owner. Amazon only allows the primary Seller Central user to authorise an application. If you manage the account on someone else's behalf, they'll need to complete step 1 themselves — after that, everything else can be done by anyone with access to the ReviewLoop account.
The connection stops working later. If access is revoked in Seller Central, or Amazon invalidates the connection, ReviewLoop pauses your billing automatically and emails you — you're never charged while disconnected. Use Test connection on the Connection tab to check the current state, and Connect with Amazon again to reconnect.
Nothing is sending. Check all three steps above are complete — the dashboard will tell you which one is outstanding. The most common cause is marketplaces never having been selected, since the daily run has no way to know which of your stores to check.
Anything else, get in touch — setup problems are the thing we most want to hear about.