Is io.github.shigechika/jquants-mcp safe to use?

io.github.shigechika/jquants-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.

How do I install io.github.shigechika/jquants-mcp?

io.github.shigechika/jquants-mcp can be installed by cloning its GitHub repository and following the setup instructions in the README.

What AI clients work with io.github.shigechika/jquants-mcp?

io.github.shigechika/jquants-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio transport.

Is io.github.shigechika/jquants-mcp actively maintained?

io.github.shigechika/jquants-mcp is actively maintained — last commit was 1 day ago.

io.github.shigechika/jquants-mcp

MCP server for retrieving Japanese stock market data via J-Quants API v2

0 tools GitHub

No known CVEs

No license

Actively maintained

Last commit 1d ago

Works with most clients

Transport: stdio

0 tools

Grade F

Edit this pageView history

Finance

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "io-github-shigechika-jquants-mcp": {
      "command": "<see-readme>",
      "args": []
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-shigechika-jquants-mcp)](https://mcppedia.org/s/io-github-shigechika-jquants-mcp)

Read me

What io.github.shigechika/jquants-mcp does

MCP server for retrieving Japanese stock market data via J-Quants API v2

Test This Server

No automated test available for this server. Check the GitHub README for setup instructions.

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

34/100across 5 weighted dimensions

How we score →

0255075100

−66

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

No package registry to scan.

Help improve this page

This server is missing a description. Tools and install config are also missing.If you've used it, help the community.

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Community

Reviews

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Have you used this server?

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How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.shigechika/jquants-mcp safe to use?: io.github.shigechika/jquants-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install io.github.shigechika/jquants-mcp?: io.github.shigechika/jquants-mcp can be installed by cloning its GitHub repository and following the setup instructions in the README.
What AI clients work with io.github.shigechika/jquants-mcp?: io.github.shigechika/jquants-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio transport.
Is io.github.shigechika/jquants-mcp actively maintained?: io.github.shigechika/jquants-mcp is actively maintained — last commit was 1 day ago.

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Community

Discussion

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Has anyone used this with Cursor?How do you handle auth?Any alternatives?

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Finance

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "io-github-shigechika-jquants-mcp": {
      "command": "<see-readme>",
      "args": []
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-shigechika-jquants-mcp)](https://mcppedia.org/s/io-github-shigechika-jquants-mcp)

Read me

What io.github.shigechika/jquants-mcp does

MCP server for retrieving Japanese stock market data via J-Quants API v2

Test This Server

No automated test available for this server. Check the GitHub README for setup instructions.

README

jquants-mcp

English | 日本語

An MCP (Model Context Protocol) server that retrieves Japanese stock market data via J-Quants API v2.

User-facing documentation site: https://shigechika.github.io/jquants-mcp/ (also available in 日本語) — start there if you want a gentler 5-minute introduction. This README is the technical reference (config schema, all 43 tools with parameter tables, deployment).

Release history and changelog: GitHub Releases.

Deployment shapes (stdio / Docker Compose / self-hosted HTTP / Cloud Run) and how to pick between them: see docs/deploy/.

Demo

24-second loop showing real output from the Claude iPhone app calling jquants-mcp tools:

Sector performance ranking (業種別騰落率) — get_sector_performance
Top turnover by trading value (売買代金ランキング) — get_top_turnover_value
Candlestick chart with SMA — render_candlestick
Quarterly financial summary (決算ダイジェスト) — get_fins_summary
5-stock return comparison — render_comparison_chart

Individual frames are in docs/screenshots/.

Features

50 MCP tools — 22 J-Quants API v2 endpoints, 9 market overview + valuation, 9 offline screener, 1 technical indicators, 1 single-stock summary, 1 cache-only equity search, 2 chart renderers (opt-in), and 5 server utilities
Two-tier SQLite cache — row-level cache for time-series data, response-level cache with TTL for others
Stock split detection — automatic cache invalidation when AdjFactor changes
Rate limiting — plan-aware sliding window (Free: 5/min, Light: 60, Standard: 120, Premium: 500)
Retry with backoff — automatic retry for 429/5xx errors
Pagination — transparent multi-page fetching
Plan-aware — all tools registered regardless of plan; graceful error messages on restriction

Requirements

Python 3.10+
J-Quants API key (Free plan or above)

Installation

# Using uv (recommended)
uv pip install jquants-mcp

# Using pip
pip install jquants-mcp

From source

git clone https://github.com/shigechika/jquants-mcp.git
cd jquants-mcp
uv sync --dev

Configuration

Settings are loaded with the following priority (later wins):

~/.jquants-api/jquants-api.toml — API key only (J-Quants official config)
~/.config/jquants-mcp/config.ini (user global)
./config.ini (current directory)
Environment variables (from MCP client or shell)

API Key (zero-config)

If you already use jquants-api-client, your API key is automatically read from ~/.jquants-api/jquants-api.toml. No extra configuration needed.

API Key via browser login

jquants-mcp login

Opens a browser to J-Quants (AWS Cognito, PKCE flow), and on success writes the API key to ~/.config/jquants-mcp/config.ini (mode 0600). Same auth backend as the official jquants-cli. Use jquants-mcp logout to clear the saved key.

config.ini

MCP-specific settings (cache, client behavior):

[jquants]
# cache_dir = ~/.cache/jquants-mcp
# base_url = https://api.jquants.com/v2

[client]
# max_retries = 5
# retry_base_delay = 1.0
# max_pages = 10

[server]
# ssl_certfile = /path/to/fullchain.pem
# ssl_keyfile = /path/to/privkey.pem
# bearer_token = <secret>
# encryption_key = <random-secret>   # enables per-user API key storage (multi-user mode)

[oauth]
# github_client_id = <your-githu

... [View full README on GitHub](https://github.com/shigechika/jquants-mcp#readme)

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

34/100across 5 weighted dimensions

How we score →

0255075100

−66

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

No package registry to scan.

Help improve this page

This server is missing a description. Tools and install config are also missing.If you've used it, help the community.

Add information

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.shigechika/jquants-mcp safe to use?: io.github.shigechika/jquants-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install io.github.shigechika/jquants-mcp?: io.github.shigechika/jquants-mcp can be installed by cloning its GitHub repository and following the setup instructions in the README.
What AI clients work with io.github.shigechika/jquants-mcp?: io.github.shigechika/jquants-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio transport.
Is io.github.shigechika/jquants-mcp actively maintained?: io.github.shigechika/jquants-mcp is actively maintained — last commit was 1 day ago.