kaist-beast-mcp — Amateur Baseball Scouting & Management (gameone x Claude)

한국어 README

An MCP server that auto-collects our league's data from gameone.kr and lets you analyze your team, build lineups, and scout opponents in natural language inside Claude.

The server only collects and organizes data; Claude does the analysis, so no extra API key is needed.

• League: Science League, group B (lig_idx=85)

• Our team: The Beasts (club_idx=22098)

How it works

gameone (login) --crawl--> parse --> SQLite
                                       |
                        MCP server (22 data/management tools)
                                       |  stdio (Desktop) / HTTP (claude.ai)
                              Claude  <- ask in natural language

This program collects/organizes data; Claude (Desktop or web) performs the reasoning (lineups, strategy).

Related MCP server: Statcast MCP Server

Requirements

1. macOS or Windows with a terminal and git installed (macOS: git is offered by Xcode Command Line Tools on first use; Windows: install "Git for Windows").

2. Claude — the Claude Desktop app (recommended), or claude.ai web (Pro/Max/Team/Enterprise).

3. Python 3.10+ — you do not need to install it yourself; the uv step below fetches 3.12.

4. Your own gameone account that is a registered league member of the Science League (records are invisible to non-members; each person uses their own account).

You do not need any LLM/Anthropic API key — Claude itself does the analysis.

Install

1) Clone

git clone https://github.com/mw-jeong/kaist-beast-baseball-mcp.git
cd kaist-beast-baseball-mcp

2) Virtual env + dependencies (uv recommended)

Install uv if you don't have it: macOS/Linux curl -LsSf https://astral.sh/uv/install.sh | sh · Windows (PowerShell) irm https://astral.sh/uv/install.ps1 | iex

After installing uv, open a new terminal so the uv command is found. Then create the venv, activate it, and install. Once activated (prompt shows (.venv)), every command in this guide is just python ... — identical on macOS and Windows.

macOS / Linux:

uv venv --python 3.12 .venv
source .venv/bin/activate
uv pip install -r requirements.txt

Windows (PowerShell):

uv venv --python 3.12 .venv
# If you see "running scripts is disabled", run this once in this window first:
Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass
.\.venv\Scripts\Activate.ps1
uv pip install -r requirements.txt

uv venv --python 3.12 downloads Python 3.12 automatically if needed. Each new terminal = re-activate (re-run the source/Activate.ps1 line). If you'd rather not activate, prefix commands with the venv python instead: macOS .venv/bin/python ..., Windows .venv\Scripts\python.exe ....

• macOS/Linux: python3.12 -m venv .venv && source .venv/bin/activate && pip install -r requirements.txt

• Windows: py -3.12 -m venv .venv then .\.venv\Scripts\Activate.ps1 then pip install -r requirements.txt

3) gameone account (.env)

cp .env.example .env      # Windows: copy .env.example .env

Edit .env and fill in your gameone id/password:

GAMEONE_USER_ID=your_id
GAMEONE_PASSWD=your_password

.env is gitignored and never committed. Do not share it — each person uses their own account.

4) Verify login

With the venv activated, run (same command on macOS and Windows):

python -m beast.cli login-test

You should see "✓ 로그인 성공". If it fails, fix .env (id/password) before continuing — the connect step won't work until login succeeds. Run all commands from the project folder.

Connect to Claude

Option A — Claude Desktop (local, simplest, recommended)

python -m beast.cli setup-desktop

This auto-registers the server in your Claude Desktop config (handles macOS and Windows paths, using this venv's Python). Then fully quit and reopen Claude Desktop — on macOS closing the window isn't enough; use Cmd+Q (or right-click the dock icon > Quit). On Windows, quit from the system tray.

Verify it loaded: in Claude Desktop, Settings > Developer should list kaist-beast-mcp as running, and the chat's tools/connector menu should show its tools. (If not, see Troubleshooting.)

If you later move or rename the project folder, the saved paths break — just re-run setup-desktop and restart Claude Desktop.

Option B — claude.ai web (remote, advanced / optional)

Most people should use Option A. Use this only if you specifically want the web app. claude.ai only accepts remote HTTP MCP servers reachable from the public internet — a local stdio server cannot be added directly. You must keep this server running in HTTP mode on your machine and expose it via a tunnel:

1. Run in HTTP mode (venv activated, leave it running): python -m beast.mcp_server --http --port 8765 (serves http://127.0.0.1:8765/mcp)

2. Install a tunnel tool and expose the port (in another terminal):

   • cloudflared — macOS brew install cloudflared, Windows winget install Cloudflare.cloudflared, then cloudflared tunnel --url http://127.0.0.1:8765

   • or ngrok (sign up, install) — ngrok http 8765 You get a public https://... URL; the MCP endpoint is that URL + /mcp.

3. In claude.ai: Customize > Connectors > Add custom connector, paste https://.../mcp. (Pro/Max; Team/Enterprise admins add it under Organization settings > Connectors.)

About .env for the web path: the server still runs on your own machine and reads the same local .env (your gameone account) — fill it exactly as in install step 3. claude.ai/Anthropic never see your credentials; they only reach your locally-running server through the tunnel. Each person who wants web access runs their own server + tunnel + connector (the server logs in as whoever's .env it is).

Security: because the server logs in with your gameone credentials, a public tunnel URL means anyone who has that URL can query it. Keep the URL private, shut the tunnel down when unused, or put auth in front. Claude Desktop (Option A) needs no tunnel and avoids this entirely.

Usage

Ask Claude in natural language, for example:

• "Show the group B standings"

• "Summarize The Beasts' batters and pitchers"

• "Scout 대전 리드오프 and suggest a lineup and pitching plan"

• "Show 김현호's game-by-game this season" / "Show 구전서's career trend"

• "Refresh the data" (after games)

Claude calls the tools below automatically. Tip: it can call guide first to learn the domain caveats (small samples, 7-inning ERA, etc.).

The first question takes ~1 minute — it triggers the initial data collection (records + box scores) and caches it. Later questions are instant; ask "refresh the data" after new games.

MCP tools (22)

Design: data tools return gameone's raw numbers; correction (shrinkage) is a separate opt-in tool. Per-game box scores enable real lineups, rotations, and recent form. See docs/GAMEONE.md for the full domain guide (also returned by the guide tool).

CLI (optional)

With the venv activated:

python -m beast.cli crawl --save                 # collect + store (records + box scores)
python -m beast.cli export --opponent "대전 리드오프"  # build a Markdown scouting report

Troubleshooting

• Server not showing in Claude Desktop -> fully quit/reopen; re-run setup-desktop; verify login-test. Check Claude Desktop > Settings > Developer.

• DH_KEY_TOO_SMALL SSL error -> gameone uses a weak DH key; a workaround adapter is included. Make sure your code is up to date (git pull).

• mcp install/version error -> your Python is < 3.10. Recreate the venv with 3.12 (install step 2).

• Windows PowerShell: "running scripts is disabled on this system" (on Activate.ps1) -> run Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass in that window, then activate again.

• python not found / wrong Python -> the venv isn't activated. Re-run the activate line (macOS source .venv/bin/activate, Windows .\.venv\Scripts\Activate.ps1), or prefix with the venv python (.venv/bin/python / .venv\Scripts\python.exe).

• Login fails -> check id/password and that the account is a Science League member.

Project layout

beast/
  config.py        settings (.env, league/team ids, group bujo_idx)
  crawler/         login, fetch, parse (session/endpoints/crawl/parse)
  storage/db.py    SQLite (snapshots + box-score game logs)
  analysis/        metrics & reports (stats, report)
  mcp_server.py    MCP server (Claude)
  desktop.py       auto-config for Claude Desktop
  cli.py           CLI
docs/GAMEONE.md    domain guide for Claude
data/              collected data (gitignored)

Use for another team/league

Override identifiers in .env (teammates leave these as-is): LIG_IDX, CLUB_IDX, OUR_JO (A/B), OUR_BUJO_IDX, CURRENT_SEASON.

Security

.env (credentials), *.bak, and collected data are never committed. Never share your account.