Steam MCP Server
An MCP server for Steam: search games and read store details, prices, reviews, discounts and news (no key), plus player profiles, libraries and achievements via the official Steam Web API (free key).
Read-only · official Steam APIs only · most tools need no key · open source.
Nobody logs in; the only credential is a free Steam Web API key you set yourself, and the server never writes, trades, posts, launches games, or makes purchases.
Works with any MCP client (Claude Desktop/Code, Cursor, VS Code, Cline, …) over stdio.
Once it's connected, just ask your agent in natural language.
No credentials needed (store, search & discovery):
"Find Hollow Knight and tell me its price, genres and age rating."
"What are recent reviews saying about Baldur's Gate 3?"
"Have Cyberpunk 2077's reviews recovered since launch?"
"Which games are >80% off right now with 90%+ positive reviews?"
"Find roguelike deckbuilders on sale."
"What discounted games run natively on macOS?"
"Which recent, well-reviewed games run on Steam Deck?"
"What well-reviewed games run on SteamOS?"
"Any games verified for the Steam Machine on sale?"
"Any Steam Frame-Verified VR games on sale?"
"What's discounted on Steam's front page right now?"
"Show me Steam's top sellers and newest releases."
"Any recent patch notes for No Man's Sky?"
"How rare is each achievement in Elden Ring?"
"How many people are playing Counter-Strike 2 right now?"
"What are the most played games on Steam right now?"
"Get current prices for appids 620, 413150 and 1145360."
"For appids 1245620 and 1086940, show price, review % and Deck / SteamOS / Machine / Frame status."
With a free API key + your STEAM_ID (your account; see Getting your credentials):
"Show my Steam profile."
"List my games by playtime."
"What have I played in the last two weeks?"
"Recommend something I'd like based on my library, on a good discount."
"Do I already own Hollow Knight and Hades?"
"What's on my wishlist that's discounted and well-reviewed?"
"List Hollow Knight's achievements and how rare each one is."
"How far am I through Elden Ring's achievements?"
"What's the SteamID64 for the profile name 'gabelogannewell'?"
"Which of my friends own Portal 2, and how many hours have they played?"
"What games do my friend and I both own, and who's played them more?"
"Show me my Steam friends list."
"Is SteamID 76561197960287930 VAC banned?"
"What games am I following that aren't on my wishlist?"
Install
Add it to your MCP client's config. Store/search tools work with no credentials; player tools need a free Steam Web API key.
{
"mcpServers": {
"steam": {
"command": "npx",
"args": ["-y", "steam-games-mcp"],
"env": {
"STEAM_API_KEY": "your-steam-web-api-key (optional — enables player tools)",
"STEAM_ID": "your-steamid64-or-vanity-name (optional — default 'you' for player tools)",
"STEAM_COUNTRY": "US (optional — store price region)",
"STEAM_LANGUAGE": "english (optional — store language)"
}
}
}
}
Replace each value with your own; remove the optional lines you don't need. A free key comes from https://steamcommunity.com/dev/apikey. From source:
npm ci && npm run build, then use"command": "node","args": ["/ABS/PATH/steam-games-mcp/dist/index.js"].
One-click install (Claude Desktop)
Download steam-games-mcp.mcpb
(always the latest release) and open it in Claude Desktop (Settings → Extensions), then
fill the optional fields (API key, Steam ID, country, language) in the install form. No JSON editing.
Also listed in the MCP Registry
as io.github.Grinv/steam-games-mcp.
Getting your credentials
Store, search and discovery tools need nothing; skip this section if that's
all you want. The player tools (profile, library, achievements)
need a free API key, and most also need a public profile — though get_wishlist
and get_followed_games need no key, and profile/ban lookups work on private
profiles. Three short steps:
-
Get a free Steam Web API key. Sign in at https://steamcommunity.com/dev/apikey, enter any domain (e.g.
localhost), and copy the key intoSTEAM_API_KEY. -
Find your Steam ID. Set
STEAM_IDto either:- your vanity name: the custom part of your profile URL
steamcommunity.com/id/YOUR_NAME→YOUR_NAME(resolved automatically), or - your 17-digit SteamID64 (
steamcommunity.com/profiles/7656…; or look it up at https://steamid.io).
With
STEAM_IDset you can just ask "my wishlist / library"; without it, give the agent a SteamID64 each time (useresolve_vanity_urlto convert a name). - your vanity name: the custom part of your profile URL
-
Make your profile public (for your own library/achievements): Steam → profile → Edit Profile → Privacy Settings → set My profile and Game details to Public.
The key and Steam ID go in your MCP client config (the
envblock above). See docs/clients.md for per-client examples. Never commit them.
Tools
Key: – no credentials · K Steam Web API key.
Two tiers. Store/search + discovery tools (store/api.steampowered.com)
need no credentials — including catalog-wide discovery (discover_games:
deals, new releases, Deck / SteamOS / Machine / Frame compatibility, tags, rating) and batch
price/review checks (get_items).
Player tools need a free
STEAM_API_KEY and a public profile; they return a clear message when the
key is unset. The two exceptions are get_wishlist and get_followed_games,
marked – above: they work with no key at all. Set STEAM_ID (a SteamID64
or vanity name — a vanity name resolves without a key too) to make those tools
default to you, so "my wishlist / library" works without passing an ID each time.
No third-party services: deal discovery and reviews come from Steam's own (keyless) store APIs. SteamDB is not used (no public API + scraping disallowed). Steam has no price-history API, so that isn't offered. Not affiliated with Valve.
Prompts
Guided one-shot prompts that orchestrate several tools for a common question. Use these when your client exposes MCP prompts, instead of describing the steps yourself:
Develop
npm install
npm run build # type-check + bundle to dist/index.js
npm test # node:test (mocked, offline)
npm run lint
npm run format
npm run check:api # live upstream health-check (key-gated checks need STEAM_API_KEY; a public STEAM_ID verifies player fields)
npm run inspector # run under the MCP Inspector
Runtime requires Node ≥ 22.18. Contributor/agent guidance: AGENTS.md. Security policy: SECURITY.md. Per-client config and all tunables: docs/clients.md.
Updating
- npx: unpinned
npx -y steam-games-mcpfetches the latest on the next run. .mcpbbundle: download the new bundle from the releases page and reinstall.- From source:
git pull && npm ci && npm run build.
Privacy Policy
steam-games-mcp runs entirely on your own machine and collects no data of
its own. See PRIVACY.md for exactly what it sends to Steam and
what (if anything) it stores locally.
License
MIT © Grinv
