mcp-steam

MCP server for Steam, focused on gaming library management, achievements, stats, and store discovery. 20 tools designed for use with Claude and other LLM agents.

Prerequisites

• Python 3.14+
• uv
• A Steam Web API Key
• Your Steam ID (numeric, up to 17 digits)

Setup

1. Get Your Steam API Key

1. Go to the Steam Web API Key page
2. Sign in with your Steam account
3. Register a domain name (any name works for personal use)
4. Note your API key

2. Find Your Steam ID

Your Steam ID is the numeric identifier in your profile URL. If your profile URL is https://steamcommunity.com/profiles/1111111111111111, your Steam ID is 1111111111111111.

If you use a custom URL (e.g., /id/username), use a Steam ID finder to look up the numeric ID.

3. Install

cd mcp-steam
uv sync

4. Configure Environment Variables

Set these before running the server:

export STEAM_API_KEY="your_api_key"
export STEAM_ID="your_steam_id"

5. Test the Connection

uv run mcp-steam

The server verifies your API key and Steam ID on startup by fetching your player summary.

Claude Desktop / Claude Code Configuration

Add to your MCP server config. If installed from PyPI:

{
  "mcpServers": {
    "steam": {
      "command": "uvx",
      "args": ["mcp-steam"],
      "env": {
        "STEAM_API_KEY": "your_api_key",
        "STEAM_ID": "your_steam_id"
      }
    }
  }
}

Or if running from a local clone:

{
  "mcpServers": {
    "steam": {
      "command": "uv",
      "args": ["--directory", "/path/to/mcp-steam", "run", "mcp-steam"],
      "env": {
        "STEAM_API_KEY": "your_api_key",
        "STEAM_ID": "your_steam_id"
      }
    }
  }
}

Tools

User Resolution

Library

Game Info

Achievements & Stats

Wishlist

News

Profile

Store Discovery

Steam Web API Notes

• API key security: Your config file contains your Steam API key. Never commit it to version control or share it publicly.
• Rate limits: The Steam Web API has undocumented rate limits. If you hit them, the server will return a rate limit error.
• Profile visibility: Some tools require your Steam profile to be public (achievements, game stats). Library data works regardless.
• Game stats availability: Not all games expose stats through the API. get_player_stats will return an error for unsupported games.
• Wishlist access: Wishlist data requires your profile's wishlist to be public.

Development

uv run mcp-steam              # Run the server
uv run ruff check src/       # Lint
uv run ruff format src/      # Format
uv run pyright src/          # Type check

Pre-commit Hooks

This project uses lefthook for pre-commit checks. Install with brew install lefthook (or see other install methods), then:

lefthook install