Steam Local MCP

A free, open-source Windows Model Context Protocol server that lets an MCP-capable agent work with the Steam client installed for the current Windows user.

Ask an agent to find an installed game, launch it, open its Steam page, check local download/update status, search the Store, or summarize Steam-library storage. Steam starts quietly in the background when a requested client action needs it.

This is a standard stdio MCP server. It is agent-neutral: use it with Codex, Claude, or any other MCP client that can run a local command.

Example Usage

User: "Pick a strategy game for me to play."

Agent: 🛠️ Calling steam_list_games()

Agent: "How about Balatro? Should I launch it?"

User: "Yes."

Agent: 🛠️ Calling steam_launch_game(app_id: 2861700)

Agent: "Launched Balatro."

What it can do

Local Steam tools — no API key

• steam_list_games and steam_find_game — inspect locally installed games across all configured Steam libraries.
• steam_launch_game — launch one installed game by name or app ID.
• steam_get_game_install_status and steam_get_download_status — inspect manifest-recorded install, update, download, and paused-download states.
• steam_get_library_storage — show installed sizes and free disk space for every local Steam library.
• steam_open_library_page, steam_open_store_page, and steam_open_client_page — navigate the Steam client.
• steam_install_game — ask Steam to install an app ID; Steam validates ownership and manages the install flow.
• steam_client_status — report the detected Steam installation, discovery source, and whether Steam is running.

Public Store tools — no API key

• steam_search_store — find Store app IDs from a game name.
• steam_get_game_details — get public metadata, price, genres, release date, and Metacritic score.

Optional account tools — Steam Web API key required

Set STEAM_API_KEY and STEAM_ID to enable:

• steam_api_status — verify if API credentials are configured, valid, and connected to Steam's Web API.
• steam_get_library — owned games, playtime, last played, filtering, and pagination.
• steam_get_recently_played — recently played games, ordered by two-week playtime.

Requirements

• Windows 10 or newer
• Steam installed for the current Windows user
• Node.js 20 or newer

Install from npm

To install the published package via npm, add this equivalent configuration to your MCP client:

{
  "mcpServers": {
    "steam": {
      "command": "npx",
      "args": ["-y", "steam-local-mcp"]
    }
  }
}

The configuration-file location differs by agent, but the command and arguments above remain the same. Restart or reconnect your MCP client after saving its configuration.

To confirm your install manually, run:

npx -y steam-local-mcp print-config

Install from source

Use this when developing, auditing the source, or before an npm release is available:

git clone https://github.com/Jackson-Brooks/steam-local-mcp.git
cd steam-local-mcp
npm install
npm run build

Then configure your MCP client to run the compiled entry point from the directory you cloned:

{
  "mcpServers": {
    "steam": {
      "command": "node",
      "args": ["C:\\path\\to\\steam-local-mcp\\dist\\src\\index.js"]
    }
  }
}

Replace C:\path\to\steam-local-mcp with your own clone location. Do not use another user's path.

Optional Steam Web API configuration

Pass credentials through your MCP client's environment configuration or the operating-system environment:

{
  "mcpServers": {
    "steam": {
      "command": "npx",
      "args": ["-y", "steam-local-mcp"],
      "env": {
        "STEAM_API_KEY": "your_key",
        "STEAM_ID": "your_64_bit_steam_id"
      }
    }
  }
}

The server never loads a .env file automatically. Never commit credentials. Steam profile and game-details privacy settings can prevent ac

... View full README on GitHub