Mercari Japan Scraper — Listings, Prices & Sold Data

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📌 Overview

The Mercari Japan Scraper searches mercari.jp — Japan's largest consumer-to-consumer marketplace — for any list of keywords and returns every matching listing as a clean record: title, price in JPY, item condition, brand, sale status, seller, category, timestamps and photo URLs. It paginates each search to pull thousands of listings per keyword.

It needs no login, no cookies and no API key — it reads only public search data over residential proxies, so there's zero account risk. With no headless browser, it's a fast and low-cost way to assemble large marketplace datasets.

✅ Add many keywords, set filters (price / condition / brand) and raise maxItemsPerTerm to build an analysis-ready Mercari dataset in one run.

✨ Features

🎯 Who it's for

• Resellers & arbitrage — track prices, sold-out velocity and brands across Japan's biggest marketplace.
• Market & pricing research — benchmark resale prices for any product or brand.
• Brand protection — monitor counterfeit and grey-market listings.
• Data science & ML — build labelled product datasets for pricing, trend and demand models.

🧾 Input

Example input

{
"searchTerms":["nintendo","pokemon card"],
"status":"on_sale",
"sort":"SORT_CREATED_TIME",
"priceMin":1000,
"priceMax":50000,
"fetchDetails":false,
"maxItemsPerTerm":1000
}

📦 Output

Each listing is saved as one structured record:

{
"id":"m12345678901",
"url":"https://jp.mercari.com/item/m12345678901",
"name":"Nintendo Switch 本体 有機ELモデル ホワイト",
"price":32000,
"currency":"JPY",
"status":"STATUS_ON_SALE",
"itemConditionId":"2",
"categoryId":"1234",
"brandId":"5678",
"brandName":"Nintendo",
"sellerId":"987654321",
"itemType":"ITEM_TYPE_MERCARI",
"thumbnail":"https://static.mercdn.net/c!/w=240/thumb/photos/m12345678901_1.jpg",
"photos":["https://static.mercdn.net/item/detail/orig/photos/m12345678901_1.jpg"],
"created":1717400000,
"updated":1717500000,
"searchTerm":"nintendo",
"scrapedAt":"2026-06-04T10:00:00.000Z"
}

With fetchDetails: true, each record also includes description, sellerName, sellerNumSellItems, sellerNumRatings and sellerScore.

📖 Output field reference

⚙️ How it works

1. You provide one or more search keywords and optional filters.
2. For each term the actor queries Mercari's public search API, signing every request with a freshly generated DPoP (ES256) token — no account, no cookies.
3. It paginates with the result page token until the term is exhausted or your cap is hit.
4. Each item is parsed into a clean record; with fetchDetails it also pulls the full description and seller stats, then streams results to the dataset.

No login, no cookies, no API keys — and no Mercari account is ever used or risked.

❓ FAQ

Is this a Mercari Japan API alternative?

Yes. Mercari has no public developer API, so this works as an unofficial Mercari API alternative — it signs its own DPoP tokens against the public search endpoint, with no API key or login required.

How do I export Mercari Japan data to CSV or JSON?

Every run streams to a dataset you can download as CSV, JSON, Excel or HTML, or pull via the Apify API and webhooks — a ready Mercari data export for spreadsheets or pipelines.

Can I scrape Mercari Japan without an API or login?

Yes — this is a no-API-key, login-free way to scrape mercari.jp. It reads only public search data over residential proxies, so no Mercari account is ever used or risked.

🔗 Works great with

• 🛒 E-commerce price trackers — feed Mercari prices into your pricing pipeline.
• 🖼️ Bulk image downloader — pull the listing photos for cataloguing or ML.

📝 Changelog

2026-06-15

• Reliability pass: re-verified end-to-end on live data with real-world inputs. Routine maintenance build.

2026-06-07

• Docs: added coverage for Mercari Japan unofficial API alternative, exporting Mercari data to CSV/JSON, and scraping mercari.jp without an API key or login.

2026-06-05

• 🛡️ Reliability fix: results are no longer dropped by strict output validation — runs now complete cleanly even at high volume (thousands of results).
• ⚡ Stability & performance hardening; fresh rebuild.

2026-06-04

• Verified live & refreshed build — reliability/maintenance pass.