mcp-steam

A Model Context Protocol (MCP) server for the Steam API. Connect any MCP-compatible client to search games, retrieve detailed information, and list a player's owned games.

Features

| Tool | Description | |---|---| | search_games | Search Steam by name or keyword, returns AppIDs, prices, platforms | | get_game_details | Full details for a game: price, description, Metacritic, genres, reviews | | get_owned_games | All games owned by a Steam player (requires API key + public profile) |

Requirements

• Node.js 18+
• A Steam Web API key for the get_owned_games tool — get one free at steamcommunity.com/dev/apikey

search_games and get_game_details use the public Steam Store API and do not require an API key.

Installation

With npx (recommended)

Add this to your MCP client configuration file:

{
  "mcpServers": {
    "steam": {
      "command": "npx",
      "args": ["-y", "@naouts/mcp-steam"],
      "env": {
        "STEAM_API_KEY": "YOUR_STEAM_API_KEY"
      }
    }
  }
}

Global install

npm install -g @naouts/mcp-steam

Then reference it in your MCP config:

{
  "mcpServers": {
    "steam": {
      "command": "mcp-steam",
      "env": {
        "STEAM_API_KEY": "YOUR_STEAM_API_KEY"
      }
    }
  }
}

Tools

search_games

Search Steam for games by name or keyword.

Parameters:

| Name | Type | Required | Default | Description | |---|---|---|---|---| | query | string | yes | — | Search query (game name or keyword) | | limit | number | no | 5 | Max results (1–20) |

Example prompt:

Search for "hollow knight" on Steam

Example response:

Found 12 result(s) for "hollow knight" (showing 5):

1. **Hollow Knight** (AppID: 367520)
   Price: $14.99 | Platforms: Windows, Mac, Linux

2. **Hollow Knight: Voidheart Edition** (AppID: 851710)
   Price: $19.99 | Platforms: Windows, Mac, Linux
...

get_game_details

Get full details for a game by its Steam AppID.

Parameters:

| Name | Type | Required | Description | |---|---|---|---| | appid | number | yes | Steam AppID (e.g. 570 for Dota 2, 730 for CS2) |

Example prompt:

Give me the details of Elden Ring on Steam (AppID 1245620)

Example response:

## Elden Ring (AppID: 1245620)

**Price:** $59.99
**Developer(s):** FromSoftware Inc.
**Publisher(s):** Bandai Namco Entertainment
**Release date:** Feb 25, 2022
**Platforms:** Windows
**Genres:** Action, RPG
**Reviews:** 722,984 recommendations
Metacritic: 95/100

**Description:**
THE NEW FANTASY ACTION RPG. Rise, Tarnished, and be guided by grace to brandish the power of the Elden Ring...

**Store page:** https://store.steampowered.com/app/1245620/

get_owned_games

List all games owned by a Steam player. The player's profile must be set to public. Requires a Steam API key.

Parameters:

| Name | Type | Required | Default | Description | |---|---|---|---|---| | steamid | string | yes | — | 17-digit 64-bit SteamID | | sort_by | string | no | "playtime" | Sort by "playtime" or "name" |

How to find a SteamID:

• Visit steamidfinder.com or steamid.io
• Or open a profile URL: https://steamcommunity.com/id/USERNAME → look for the 17-digit ID

Example prompt:

Show me the games owned by SteamID 76561198000000000, sorted by playtime

Example response:

## Owned games for SteamID 76561198000000000

**Total games:** 312
**Total playtime:** 8,453 hours

### Top 25 games (sorted by playtime):
 1. **Counter-Strike 2** — 1,204h (3h 22min last 2 weeks)
 2. **Dota 2** — 987h
 3. **The Witcher 3: Wild Hunt** — 342h
...

Environment Variables

| Variable | Required | Description | |---|---|---| | STEAM_API_KEY | For get_owned_games | Your Steam Web API key |

Development

# Clone and install
git clone https://github.com/naouts/mcp-steam.git
cd mcp-steam
npm install

# Build
npm run build

# Run locally
STEAM_API_KEY=your_key node dist/index.js

# Watch mode (rebuilds on change)
npm run build && npm run dev

Project structure

mcp-steam/
├── src/
│   └── index.ts      # Server + all tools
├── dist/             # Compiled output (git-ignored)
├── package.json
├── tsconfig.json
└── README.md

Publishing to npm

# Make sure you're logged in
npm login

# Dry-run to verify what gets published
npm publish --dry-run --access public

# Publish
npm publish --access public

License

MIT — see LICENSE