Amazon Buy Box control room with guarded price updates

Build me a Buy Box and pricing control room for my Amazon listings. I want to open it every morning, see which of my listings are losing the featured offer, and fix the ones worth fixing, instead of clicking through Seller Central listing by listing.

The main screen is a table of my active ASINs. Load my listings from Amazon Seller Partner using Search Listings Items, filtered to active listings in the marketplace I configure. For each row show: my SKU and ASIN, the product title, my current price, who currently owns the Buy Box, the featured offer price, the gap between my price and the featured offer price, the total number of competing offers, and whether the winning offer is fulfilled by Amazon. Let me sort and filter the table, and default the sort to the listings where I am losing the most, so the biggest problems are at the top.

The competitive picture per ASIN comes from two Amazon Seller Partner operations: Get Item Offers for the offer list and Buy Box eligibility, and Get Competitive Pricing for the competitive price points. Derive a Buy Box status for each listing with exactly three states and label them distinctly in the UI. I own the Buy Box means the winning offer is mine. Buy Box lost means another seller holds the featured offer, so show their price and the gap I would need to close. Buy Box suppressed means no seller holds the featured offer at all, which is a different problem entirely and usually means the price is too high against recent market prices, there is no Prime or fast shipping offer, or seller feedback is too low. Never collapse lost and suppressed into a single warning state, because they need completely different responses. For a suppressed listing, do not present a competitor gap, since there is no competitor to beat. Instead surface the likely suppression reasons as a checklist.

Get Item Offers and Get Competitive Pricing are both rate limited at roughly one request every two seconds, with a burst of one. Do not call them on every page load. Instead, store the competitive data for each ASIN along with the time it was fetched, and render the table from that stored data with a clear timestamp showing how fresh it is. Provide a manual refresh button that walks the ASINs in batches, spacing requests to stay under the rate limit, with a visible progress state showing how many listings have been refreshed out of the total and which one is in flight. Let me cancel a refresh in progress, and let me refresh a single listing on its own from the detail panel. If a request comes back throttled, back off and retry rather than dropping the listing, and mark any listing whose refresh failed so I know its data is stale.

Clicking a row opens a detail panel for that ASIN. List every competing offer with its price, shipping cost, landed price, condition, fulfillment channel, and seller feedback rating, with the offer currently winning the Buy Box clearly marked. For the seller who currently owns the Buy Box, pull their storefront reputation from Real-Time Amazon Data using Get Seller Profile, and pull the live product page detail with Get Product Details. Show the seller's feedback rating, feedback count, and how established they look, next to the live product page information. The point is to tell a legitimate competitor apart from someone hijacking my own listing, so make that comparison easy to read at a glance.

From the detail panel I can set a new price and push it live using Amazon Seller Partner Patch Listings Item, which takes a JSON Patch partial update against the listing's price attribute. Before any write, enforce a per SKU floor price that I configure once and that the app stores. If the price I enter is below that SKU's floor, block the submission entirely with a clear explanation of the floor, and do not send anything to Amazon. If the price passes the floor, show a confirmation step that states the SKU, the current price, and the new price, and require me to confirm before the write happens. After a successful write, record the change and refresh that listing's competitive data so I can see the effect.

Add a settings area where I set and edit the floor price for each SKU, in bulk if possible, since I want to configure them once and have the app enforce them from then on. Persist the floor prices, the cached competitive data with fetch timestamps, and a history of the price changes I have pushed, showing what changed, when, and what the Buy Box status was at the time. Show a listing with no floor price set as not yet repriceable, and prompt me to set one before I can submit a price for it.

Nothing in this app should reprice automatically. Every price change is reviewed and confirmed by me. The app's job is to make the situation obvious and the fix safe.