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.

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

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.