J-Quants MCP

An MCP (Model Context Protocol) server that retrieves Japanese stock market data via J-Quants API v2. It runs locally over stdio via the published package.

People connecting finance tools to Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-08-22 · ★ 2 · #29 OF 283 MAINTAINED FINANCE · VERIFIED 2026-08-25

MIT · Python servers · how we verify → /methodology

01 · Install J-Quants MCP

before you install - you'll need

JQUANTS_API_KEY

Environment variables documented in the project's README - it lists which are required and which have defaults.

Claude Code

claude mcp add shigechika-jquants-mcp -- uvx jquants-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "shigechika-jquants-mcp": {
      "command": "uvx",
      "args": [
        "jquants-mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

pypi package jquants-mcp - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.shigechika is GitHub-verified and matches the repo owner

03 · What J-Quants MCP can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

An agent gets 2 documented tools spanning api, key, including register_api_key, delete_api_key.

The 2 tools it gives your agent

Extracted from the project's README - what J-Quants MCP lets an agent do.

register_api_key: - Encrypt and store your J-Quants API key
delete_api_key: - Remove your stored key

Latest releases

v1.3.0 · 2026-08-22

1.3.0 (2026-08-22) · fetch the earnings calendar from /fins/earnings-date on Light+ plans

v1.2.0 · 2026-08-15

1.2.0 (2026-08-15) · package the server as a Claude Code plugin

v1.1.0 · 2026-08-13

1.1.0 (2026-08-13) · rebuild the compose path on mcp-stdio serve · fall back to dpkg when TARGETARCH is unset · stop paging on cold starts

04 · Who maintains J-Quants MCP

J-Quants MCP is maintained by shigechika. We track 13 MCP servers from shigechika - 13 actively maintained, 11 combined GitHub stars, oldest repo from Feb 2026. Full record: all servers from shigechika.

MCP Stdio Stdio-to-HTTP gateway - connects MCP clients to remote HTTP MCP servers ★ 8

05 · Facts

repository: github.com/shigechika/jquants-mcp
category: finance - ranked #29 of 283 actively-maintained finance servers as of 2026-08-25.
release cadence: 10+ releases in the last 90 days (latest 2026-08-22)
registry: io.github.shigechika/jquants-mcp (active, first published 2026-04-29 · 105 versions)
packages: pypi:jquants-mcp

06 · J-Quants MCP FAQ

What is J-Quants MCP?

An MCP (Model Context Protocol) server that retrieves Japanese stock market data via J-Quants API v2. It runs locally over stdio via the published package.

Is J-Quants MCP still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-22 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

How do I install J-Quants MCP?

Run `uvx jquants-mcp`. The README documents one environment variable (JQUANTS_API_KEY) to set first. You can also paste the ready-made client config above.

Does J-Quants MCP run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to J-Quants MCP

Alternatives to J-Quants MCP

Maintained finance servers if J-Quants MCP isn't the fit.

Pairs well with

Servers that cover what J-Quants MCP doesn't - only shown when the pairing reason fits the companion.

More finance MCP servers · L402 Kit · PCI DSS v4.0.1 Compliance Checker · Bcb Br MCP · DJZS Trust MCP · Knowmint

More Python MCP servers · Stdio · SMRITI Memory · Mi Fitness Data Bridge · Live Memory · Tokenmizer · see all