rakuten-mcp

A Model Context Protocol server for the Rakuten Web Service API. 28 read-only tools across six Rakuten product families: Ichiba (marketplace), Books, Travel, Recipe, Kobo, and GORA (golf).

Every tool description ships in English and Japanese. Every endpoint was verified against the live Rakuten API on 2026-06-04 before release.

Install

npm install -g rakuten-mcp

Or npx rakuten-mcp on demand.

Configuration

1. Register at Rakuten Web Service.
2. Create an application. You get a UUID Application ID and a pk_-prefixed Access Key.
3. Optional: register an Affiliate ID to monetize product links. Item URLs in tool responses will carry it.

Variable	Required	Description
RAKUTEN_APP_ID	yes	Application ID (UUID format on the new platform)
RAKUTEN_ACCESS_KEY	yes	Access Key (starts with pk_)
RAKUTEN_AFFILIATE_ID	no	Affiliate ID appended to every item URL
RAKUTEN_MAX_RETRIES	no	Retries on 429 / 5xx. Default 3.

Claude Desktop

Edit claude_desktop_config.json:

{
  "mcpServers": {
    "rakuten": {
      "command": "npx",
      "args": ["-y", "rakuten-mcp"],
      "env": {
        "RAKUTEN_APP_ID": "your-app-id",
        "RAKUTEN_ACCESS_KEY": "your-access-key"
      }
    }
  }
}

Claude Code

claude mcp add rakuten -e RAKUTEN_APP_ID=... -e RAKUTEN_ACCESS_KEY=... -- npx -y rakuten-mcp

Cursor / Cline / Continue

Same JSON shape as Claude Desktop, under each client's MCP config path.

Tools

Ichiba (5)

Tool	What it does
ichiba_item_search	Keyword search on Rakuten Ichiba with price filters, sort, genre/shop restrictions.
ichiba_genre_search	Browse the genre tree. Returns current, ancestors, siblings, and children.
ichiba_tag_search	Look up a specific tag by ID. Returns the tag group and name.
ichiba_item_ranking	Bestseller ranking, overall or by genre / period / age / gender.
ichiba_product_search	Item Price Navi: same product across multiple sellers with min/max/avg price.

Books (9)

Tool	What it does
books_total_search	Cross-category search across all of Rakuten Books.
books_book_search	Printed books by title, author, ISBN, publisher.
books_cd_search	Music CDs by title, artist, label, JAN.
books_dvd_search	DVDs / Blu-ray.
books_foreign_book_search	Non-Japanese books. Returns japaneseTitle when a translation exists.
books_magazine_search	Magazines by title, publisher, JAN.
books_game_search	Video games by title, hardware platform, JAN.
books_software_search	Computer software by title, OS, JAN.
books_genre_search	Browse the Books genre tree (000 = top).

Travel (7)

Tool	What it does
travel_simple_hotel_search	Hotels by area code or lat/lon.
travel_vacant_hotel_search	Hotels with rooms available on specific check-in / check-out dates. Returns plans with per-night and total pricing.
travel_hotel_detail_search	Full details for one hotel by hotelNo.
travel_get_area_class	The area-code hierarchy: 日本 → 47 prefectures → cities → districts.
travel_keyword_hotel_search	Free-text hotel search by name / landmark / area.
travel_get_hotel_chain_list	All 307 hotel chains registered on Rakuten Travel.
travel_hotel_ranking	Top hotels by ranking genre (all / onsen / ryokan / city / resort / business / pension / publichouse).

Recipe (2)

Tool	What it does
recipe_category_list	The full Rakuten Recipe category tree (43 large → ~540 medium → ~1500 small). Pass level to fetch one tier.
recipe_category_ranking	Top recipes in a category with title, ingredient list, prep time, cost estimate, image, and author.

Kobo (2)

Tool	What it does
kobo_ebook_search	Search Rakuten Kobo's eBook catalogue. Returns title, series, author, publisher, language code, price, and sale URL.
kobo_genre_search	Browse the Kobo genre tree. Top-level is 101 (電子書籍).

GORA (3)

Tool	What it does
gora_golf_course_search	Golf courses by area code, keyword, or coordinates.
gora_golf_course_detail	Full course profile: designer, hole/par, course distance, green type, dress code, facilities, base prices.
gora_plan_search	Reservation plans on a specific play date. Returns per-plan prices, cart/caddie/lunch inclusions, player-count constraints.

Example queries

楽天で1万円以下のワイヤレスイヤホンを探して。レビュー4以上。
村上春樹の楽天Kobo電子書籍を新着順で。
東京駅近くのホテル、7月1〜2日、2名で1泊1万5千円以下の空室。
今週末東京近郊のゴルフ場で安いプランは？
楽天レシピで人気の鶏胸肉料理を5件、材料と所要時間込みで。
JANコード 4988601009447 のCDの取扱店舗。

Architecture

Modular: one file per API family under src/tools/. Stdio and HTTP transports both supported. Typed error tree with 8 classes covering Config / Auth / RateLimit / Server / NotFound / BadRequest / MalformedResponse / Unknown. Retry-with-backoff on 429 and 5xx, parses Retry-After as both seconds and HTTP-date. See AGENTS.md for the architecture brief, conventions, and how to add a new tool.

Safety

All 28 tools are read-only HTTP GETs against the Rakuten Web Service API. No tool creates, modifies, or deletes anything. Rakuten's terms of service and rate limits apply. Returned items are promotional listings — verify prices and availability on Rakuten before acting on them.

Disclaimer

Unofficial. Not affiliated with, endorsed by, or sponsored by Rakuten Group, Inc. Rakuten, Rakuten Ichiba, Rakuten Books, Rakuten Travel, Rakuten Recipe, Rakuten Kobo, and Rakuten GORA are trademarks of Rakuten Group, Inc. Use at your own risk.

License

MIT