Mercari Japan Price Checker — Sold Comps & Market Stats

One call answers the question every reseller, collector, and proxy buyer keeps asking: "What is this item actually worth on Mercari Japan?"

Instead of dumping thousands of raw listings on you, this Actor samples sold (completed) listings for your keywords and returns a ready-to-use price summary — median, average, quartiles, price range, and how fast items sell — plus the individual comps if you want them.

Try it free in 30 seconds: hit Start with the prefilled example — one keyword costs a flat $0.02, covered many times over by the $5 free usage credit every Apify account gets each month.

日本語ガイド — メルカリの売り切れ相場を1コールで

概要: メルカリの売り切れ(SOLD)商品をキーワード検索し、実際に売れた価格の統計 — 中央値・平均・四分位・価格帯 — と「売れるまでの日数」の中央値を JSON で返します。出品前の相場チェック、仕入れ・せどりの判断、eBay など海外市場との価格差の確認に使えます。

使い方: 入力欄にキーワードを入れて Start を押すだけ。日本語キーワードが最も精度が高く、複数キーワードの一括チェックもできます。

{
    "keywords": ["ポケモンカード リザードン psa10"],
    "itemStatus": "sold_out",
    "maxItemsPerKeyword": 120,
    "convertToUsd": true
}

料金: 1キーワードあたり $0.02(約3円) の従量課金で、サブスクリプションや月額固定費はありません。個別の売り切れ一覧(タイトル・価格・URL 付き)も欲しい場合は Include individual listings をオンにすると +$0.002/件。結果が0件のキーワードには課金されません。Apify の無料プランには毎月 $5 分の無料クレジットが付くので、月250回程度の相場チェックまで実質無料です。

Why sold comps?

Asking prices lie. Sold prices don't. Mercari Japan is the world's largest source of Japanese collectibles — trading cards (Pokémon, One Piece, Yu-Gi-Oh!), anime figures, film cameras, watches, fashion, retro games — but its sold-item data is only browsable in Japanese, one page at a time. This Actor turns it into structured market intelligence:

• Price a collection before you buy or sell — median and quartiles from real completed sales
• Spot arbitrage — compare Japan sold prices against eBay/StockX/your local market
• Track liquidity — medianDaysToSell tells you how fast an item actually moves
• Feed your AI agent or spreadsheet — clean JSON, USD conversion included

Pricing — know your cost before you run

No subscription, no monthly rental — you pay per call:

Event	Price
Price summary (one per keyword)	$0.02
Individual listing record (optional, off by default)	$0.002 each

• A default run costs a flat $0.02 per keyword — the summary is the product. 10 keywords = $0.20.
• Want the raw comps too? Turn on Include individual listings: e.g. 120 listings add $0.24.
• Keywords with zero results are never charged.
• Apify's free plan includes $5 of usage credit every month — about 250 price checks at no cost. Most scrapers rent by the month; here an occasional price check costs cents.

Input example

{
    "keywords": ["ポケモンカード リザードン psa10", "Leica M6"],
    "itemStatus": "sold_out",
    "maxItemsPerKeyword": 120,
    "convertToUsd": true
}

Japanese keywords give the best coverage. English brand names (Leica, Rolex, Supreme) also work well.

Output

One price_summary record per keyword:

{
    "type": "price_summary",
    "keyword": "ポケモンカード リザードン psa10",
    "status": "sold_out",
    "totalListingsFound": 7767,
    "sampledListings": 120,
    "priceJpy": { "min": 2030, "p25": 12800, "median": 22750, "p75": 39800, "max": 450000, "average": 31420 },
    "priceUsd": { "min": 13.4, "p25": 84.5, "median": 150.2, "p75": 262.7, "max": 2971.0, "average": 207.4 },
    "medianDaysToSell": 3,
    "checkedAt": "2026-07-02T12:00:00+00:00"
}

Plus (optional) every sampled listing with title, JPY/USD price, condition, photo, timestamps, and a direct jp.mercari.com URL.

Use with AI agents

This Actor works out of the box with the Apify MCP server, so Claude, ChatGPT, and other MCP-enabled agents can check Japanese market prices autonomously — for example inside an automated sourcing or repricing workflow.

Fair use & data

• Reads only publicly visible listing data — no login, no personal data beyond what any visitor sees
• Requests are throttled to keep the load on Mercari negligible
• Not affiliated with Mercari, Inc. Data is provided for market research; verify before large transactions

Roadmap

Multi-marketplace comps (Yahoo! Auctions / PayPay Flea Market), price history tracking, and category-level market reports. Feedback via issues is very welcome — tell me what your workflow needs.