Japan Price Alert MCP

io.github.atushi1841Published by GitHub account atushi1841v0.1.0Updated Oct 27, 2026

Price change alert MCP. Apify: apify.com/fruitful_quintessence Gumroad: atushi5.gumroad.com/l/kutuxe

The publisher's own server: Alertcamp

VerifiedSTDIODesktop onlyWeb Search & ScrapingBusiness & Commerce

Overview

AI-generated overview

Monitors product prices on Japanese e-commerce sites and alerts an assistant's user when prices drop, via a local stdio server.

What you can do
  • Create, list, inspect, update and delete price watches for product URLs on Japanese marketplaces such as Mercari, Yahoo Auctions, Rakuten, SUUMO, Kakaku.com and Suruga-ya
  • Run an immediate price check on one watch or batch-check all due watches
  • Read historical price data for a watched item
  • Detect which supported platform a product URL belongs to
  • Send alerts on price thresholds, any drop, percentage drops or restock, to logs, Telegram or a webhook
When to use it
Useful when you want an assistant to track prices of items on Japanese marketplaces and shopping or auction sites and notify you when a target price is reached or an item drops in price or comes back in stock.
Requirements
Runs locally as a stdio process; the README lists Python 3.10 or newer with fastmcp, or installation through the Smithery CLI. Optional environment variables PRICE_WATCH_DB for the SQLite database path, and TELEGRAM_BOT_TOKEN plus TELEGRAM_CHAT_ID for Telegram alerts. Network access is needed to scrape the marketplace pages.
Before you install
Telegram notifications require a bot token and chat ID, which are secrets to store carefully. Webhook alerts POST to a URL you supply, so data leaves the machine. Watches write to a local SQLite database and can be updated or deleted. Scraping marketplace pages may conflict with their terms of service. Email alerts are only logged, not actually sent.

Installation

In SourceWeft

  1. Open Japan Price Alert MCP in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

japan-price-alert-mcp

Japanese EC price-change monitoring and notification MCP server for AI agents.

[Smithery]

Overview

Monitor product prices across major Japanese e-commerce platforms (Mercari, Yahoo Auctions, Rakuten, SUUMO, Kakaku.com) and receive instant alerts on price drops.

Built on the Kensho project's price monitoring engine.

Platforms

  • Mercari Japan (メルカリ) - jp.mercari.com
  • Yahoo! Auctions / Shopping (ヤフオク) - auctions.yahoo.co.jp, shopping.yahoo.co.jp
  • Rakuten Ichiba (楽天市場) - item.rakuten.co.jp
  • SUUMO (SUUMO) - suumo.jp
  • Kakaku.com (価格.com) - kakaku.com
  • Suruga-ya (駿河屋) - suruga-ya.jp

Tools

ToolDescription
create_price_watchRegister a new product URL for price monitoring
list_price_watchesList all registered watches
get_price_watchGet details of a specific watch
update_price_watchUpdate watch parameters (target price, interval, etc.)
delete_price_watchRemove a watch
check_price_watchForce immediate price check
run_due_price_checksBatch check all due watches
get_price_historyGet historical price data
detect_platform_urlDetect platform from URL

Installation

Smithery (Recommended)

bash
npx @smithery/cli install atushi1841/japan_price_alert_mcp

Manual

bash
# Clone or extract the MCPB bundle# Configure in your MCP client:{  "servers": {    "japan-price-alert-mcp": {      "command": "uv",      "args": ["run", "--directory", "/path/to/bundle", "src/stdio_main.py"]    }  }}

Configuration

Environment VariableDescriptionDefault
PRICE_WATCH_DBCustom SQLite database path<bundle>/data/price_watch.db
TELEGRAM_BOT_TOKENTelegram bot token (for notifications)-
TELEGRAM_CHAT_IDTelegram chat ID (for notifications)-

Usage Examples

typescript
// Create a price watchconst result = await mcp.callTool("create_price_watch", {  user_id: "user123",  url: "https://www.mercari.com/us/item/m123456789/",  target_price_jpy: 5000,  notification_channel: "telegram",  notification_destination: "123456789",  check_interval_minutes: 30});
// Check a specific watchconst check = await mcp.callTool("check_price_watch", {  watch_id: "pw_abc123"});
// List all watchesconst list = await mcp.callTool("list_price_watches", {  user_id: "user123"});

Alert Conditions

  • lte (default): Alert when price <= target_price_jpy
  • any_drop: Alert on any price decrease
  • percent_drop: Alert when price drops by >= drop_percentage%
  • in_stock: Alert when item comes back in stock

Notification Channels

  • log (default): Log to stderr
  • telegram: Send to Telegram bot (requires token + chat_id)
  • webhook: POST to specified URL
  • email: Log email alert (SMTP not implemented)

Dependencies

  • Python >=3.10
  • fastmcp >=3.0.0
  • stdlib only for scraping (no external dependencies beyond fastmcp)

License

MIT

Author

atushi1841

Data & Store

Source: README.md at commit 8eabd25

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v0.1.0LatestOct 18, 2026

Score

40% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

    Declare a license in the repository or the registry entry.

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