Shipping Cost Comparator
Compare shipping options across retailers.
shopping
PlugThis prompt
Build a Chrome extension called "Shipping Cost Comparator" that, on any product page, detects the product name and target ship-to address (from user options). Query a configured list of competing retailers via their public search endpoints (Amazon, Walmart, Target) to find a matching SKU, then surface a sidebar comparing each retailer's price + shipping + ETA. Cache results per query for 1 hour. Permissions: storage, activeTab. Host permissions: <all_urls>. Manifest V3 with content script and service worker.
How to build it in 3 minutes
- Sign in to PlugThis and open the chat input.
- Copy the prompt above and paste it into the chat.
- PlugThis generates the full Manifest V3 extension in 60-90 seconds.
- Download the zip, extract it, and load it via
chrome://extensionsdeveloper mode.