Steam Mcp

Steam-MCP

FastMCP 3.2 portmanteau server for Valve Steam — profile, library, stats, store, Workshop, SteamCMD status. React dashboard with hybrid Ollama chat, Prefab cards, fleet discovery (/.well-known/mcp/manifest.json), MCPB bundle, and Tauri native shell.

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Fleet SOTA (v0.3.1)

| Item | Status | |------|--------| | Portmanteau + Prefab + agentic | ✅ | | manifest.json + just mcpb-pack | ✅ | | assets/prompts/ (MCPB 3-4-100) | ✅ | | install-mcp.ps1 | ✅ | | /.well-known/mcp/manifest.json | ✅ | | GET /api/capabilities | ✅ | | llms.txt + generated llms-full.txt | ✅ | | Tauri scaffold + release CI | ✅ |

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Portmanteau tools

| Tool | Operations | |------|------------| | steam_profile | own, summaries, friends, resolve_vanity | | steam_library | owned, recent, details, wishlist | | steam_stats | achievements, global_percentages, players, leaderboards | | steam_store | news, search, reviews | | steam_workshop | query, item_details | | steam_system | status, steamcmd_status |

Also: steam_help, agentic_steam_workflow, Prefab show_* cards.

No API key: store search, app details, news, player counts, global achievement %.

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Quick start

git clone https://github.com/sandraschi/steam-mcp.git
cd steam-mcp
uv sync

$env:STEAM_API_KEY = "your-key"   # https://steamcommunity.com/dev/apikey
$env:STEAM_ID = "7656119xxxxxxxxxx"

just serve              # backend :11020
.\start.ps1             # backend + frontend :11021

MCP: http://localhost:11020/mcp · REST: /api/status, /api/capabilities, /api/tools/{name}/call

Discovery: http://localhost:11020/.well-known/mcp/manifest.json

Install MCP client: .\install-mcp.ps1 print · MCPB: just mcpb-pack

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MCP client config

{
  "mcpServers": {
    "steam": {
      "command": "uv",
      "args": ["--directory", "D:/Dev/repos/steam-mcp", "run", "steam-mcp"],
      "env": {
        "STEAM_API_KEY": "...",
        "STEAM_ID": "..."
      }
    }
  }
}

HTTP:

{
  "mcpServers": {
    "steam": { "url": "http://localhost:11020/mcp" }
  }
}

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Example calls

{"operation": "search", "query": "Godot", "count": 5}

→ steam_store

{"operation": "players", "app_id": 440}

→ steam_stats (no key)

{"operation": "owned"}

→ steam_library (key + STEAM_ID)

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Architecture

src/steam_mcp/
  services/          # Steam API logic (shared httpx client)
  mcp/tools/         # portmanteau, prefab, prompts, resources, agentic
  skills/steam-mcp/  # MCP skill for hosts
  server.py          # FastAPI + /mcp mount
  web.py             # REST bridge
webapp/              # Vite React dashboard (Chat tool console)

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Development

just install
just test
just smoke
just lint
just e2e

Fleet doc: mcp-central-docs/projects/steam-mcp/README.md

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License

MIT

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: sandraschi
• Source: sandraschi/steam-mcp
• License: MIT
• Homepage: https://github.com/sandraschi/steam-mcp

Install and usage instructions live in the source repository linked above.