NotifyJP watches Mercari’s firehose 24/7 and pings you within a minute of something you want listing — by keyword, brand, seller, or category, in English or Japanese. More of Japan’s marketplaces are on the roadmap.
🔥1M+ new listings a day📊Live, by the minute 
🔥1M+ new listings a day📊Live, by the minute 
🔥1M+ new listings a day📊Live, by the minute Start with Mercari today — your watches will carry over to other marketplaces as we add them.
Built for resellers, collectors, and anyone who wants the deal before everyone else.
Discord, Telegram, email, or browser push within a minute of a match listing — with a link straight to buy.
Type what you want in English. We expand it to the Japanese terms sellers actually use, so nothing slips past.
Filter by keyword, brand, seller, category, price — even buy-it-now vs auction. Whole-word matching, not blunt substrings.
We scan every new Mercari listing, not a sampled feed — over a million arrive every day.
Follow a seller's every drop, or watch only auction-format listings. Perfect for grails and restocks.
See what Japan is listing right now — by category, brand, condition, price, and hour of day.
A keyword, brand, seller, or category. English is fine — we handle the Japanese.
Every new Mercari listing, scanned within a minute of going live.
Within a minute, on your channel of choice, with a direct link before anyone else pounces.
The real product — live data, your watches, and the ping within a minute of a match listing.
🌐Type English, match Japanese🎯Keyword · brand · seller🔨Buy-now or auction 
🌐Type English, match Japanese🎯Keyword · brand · seller🔨Buy-now or auction 
🌐Type English, match Japanese🎯Keyword · brand · seller🔨Buy-now or auction 
🌐English → Japanese🔨Buy-now or auction filter 
🌐English → Japanese🔨Buy-now or auction filter 
🌐English → Japanese🔨Buy-now or auction filter We’re opening up access in waves. Drop your email and we’ll bring you in.
Fast listing alerts for Mercari Japan. Tell it what you’re hunting for and it pings you within a minute of a matching listing appearing — so you buy before someone else does.
Mercari today. We’re exploring Yahoo Auctions Japan and other Japanese marketplaces — your watches will carry over as we add them.
No. Type your keywords in English and we expand them to the Japanese terms sellers actually use, so you don’t miss listings just because of the language.
Typically within a minute of a listing going live — we poll the firehose continuously, not on a slow schedule.
Free during the beta. Join the waitlist and we’ll let you in as we open up capacity.