How to Scrape eBay Listings and Track Auction Prices

eBay has billions of listings. Here is how to extract and monitor them. eBay APIs Browse API (Free) async function searchEbay ( query , limit = 10 ) { const url = `https://api.ebay.com/buy/browse/v1/item_summary/search?q= ${ encodeURIComponent ( query )} &limit= ${ limit } ` ; const res = await fetch ( url , { headers : { Authorization : `Bearer ${ token } ` } }); return res . json (); } Finding API (No Auth for Basic Search) https://svcs.ebay.com/services/search/FindingService/v1?OPERATION-NAME=findItemsByKeywords&keywords=macbook&paginationInput.entriesPerPage=10&RESPONSE-DATA-FORMAT=JSON&SERVICE-VERSION=1.0.0&SECURITY-APPNAME=YOUR_APP_ID What Data You Get Item title, price, condition Auction end time, bid count Seller rating and feedback Shipping cost and location Item specifics (brand, model, etc.) Images Use Cases Price research — what does X sell for? Arbitrage — find underpriced items Market sizing — how many listings for X? Trend tracking — price changes over time Competitor mo