steam-mcp

An MCP server that exposes the Steam Web API to any AI harness — Claude Desktop, Claude Code, Cursor, Cline, Windsurf, or anything that speaks the Model Context Protocol.

Ask your assistant things like "How many hours have I put into Team Fortress 2?", "What are the most-played games my friend owns?", or "Summarize the reviews for Baldur's Gate 3" — and it fetches the answer live from Steam.

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Why

The Steam Web API is powerful but sprawling: dozens of interfaces, inconsistent shapes, 64-bit SteamIDs, an undocumented store API, and a mandatory key for anything player-related. steam-mcp wraps the useful parts behind a small, well-documented set of workflow-oriented MCP tools that return LLM-friendly, token-efficient responses.

Quickstart

You need a Steam Web API key for player/profile tools. Get one (free) at https://steamcommunity.com/dev/apikey. Store tools (app details, reviews, search) work without a key.

Run it straight from GitHub with no install using uv (works today — PyPI release pending):

STEAM_API_KEY=xxxxxxxx uvx --from git+https://github.com/rachittshah/steam-mcp steam-mcp

Or install it from source:

uv pip install git+https://github.com/rachittshah/steam-mcp
# once published to PyPI: uv pip install steam-mcp

Claude Desktop / Claude Code

Add to your MCP config (claude_desktop_config.json, or .mcp.json for Claude Code):

{
  "mcpServers": {
    "steam": {
      "command": "uvx",
      "args": ["--from", "git+https://github.com/rachittshah/steam-mcp", "steam-mcp"],
      "env": { "STEAM_API_KEY": "your-key-here" }
    }
  }
}

(After a PyPI release the args simplify to ["steam-mcp"].)

Cursor / Cline / Windsurf

Point the MCP server command at the same uvx --from git+... steam-mcp invocation and set STEAM_API_KEY in the environment. See docs/clients.md for per-client instructions.

Configuration

Variable	Required	Default	Description
STEAM_API_KEY	for player tools	—	Steam Web API key.
STEAM_MCP_TIMEOUT	no	20	HTTP request timeout (seconds).
STEAM_MCP_LANGUAGE	no	english	Language for localized store responses.
STEAM_MCP_COUNTRY	no	US	ISO country code for store pricing.

Tools

The full, generated tool reference lives in docs/tools.md. Highlights:

• Identity — resolve_vanity_url, get_player_summary, get_player_bans, get_steam_level
• Library — get_owned_games, get_recently_played_games, get_friend_list
• Achievements & stats — get_player_achievements, get_game_schema, get_global_achievement_percentages, get_current_player_count
• Store — get_app_details, get_app_reviews, search_store
• News — get_news_for_app

Example prompts

Once connected, try asking your assistant:

• "How many people are playing Counter-Strike 2 right now?" → search_store → get_current_player_count
• "What's the rarest achievement in Team Fortress 2?" → get_global_achievement_percentages
• "Summarize the recent reviews for Elden Ring." → search_store → get_app_reviews
• "Whose profile is steamcommunity.com/id/gabelogannewell, and what are they playing?" → get_player_summary
• "What are my 5 most-played games?" (needs your SteamID) → get_owned_games
• "Any recent patch notes for Dota 2?" → get_news_for_app

Development

git clone https://github.com/rachittshah/steam-mcp
cd steam-mcp
uv venv && source .venv/bin/activate
uv pip install -e ".[dev]"
ruff check . && mypy src && pytest

Contributing

Contributions welcome — see CONTRIBUTING.md.

License

MIT © Rachitt Shah. Not affiliated with or endorsed by Valve Corporation. Steam and the Steam logo are trademarks of Valve Corporation.