pysteam-client
Modern Python client for the Steam network — CM protocol, PICS, CDN, WebAuth, Web API, Steam Guard, SteamIDs — plus a fully-async facade for FastAPI / TaskIQ and an MCP tool set for LLM agents.
Maintained fork of ValvePython/steam for Python 3.13+ and current Steam wire protocols. Full docs in the Wiki.
Install
pip install pysteam-client[client][client] pulls in the gevent-based SteamClient (login, PICS, CDN). Without it the requests-only subset (WebAPI / WebAuth / SteamID / master-server query) still works.
Quick start
Sync (script, CLI, batch jobs):
from steam.client import SteamClient
client = SteamClient()
client.anonymous_login()
info = client.get_product_info(apps=[440], timeout=15)
print(info["apps"][440]["common"]["name"])
client.logout()Async (FastAPI, TaskIQ, any asyncio app):
from steam.aio import AsyncSteamClient
async with AsyncSteamClient() as client:
await client.anonymous_login()
info = await client.get_product_info(apps=[440])MCP (expose to an LLM agent):
from mcp.server.fastmcp import FastMCP
from steam.aio import AsyncSteamClient
from steam.mcp import register_steam_tools
server = FastMCP("Steam")
client = AsyncSteamClient()
await client.start()
await client.anonymous_login()
register_steam_tools(server, client) # steam.status, steam.get_product_info, steam.send_umDocumentation
Full documentation lives in the Wiki. Highlights:
Getting started
Client APIs
SteamClient — sync gevent client (the original)
PICS — app / package metadata
CDNClient — depot downloads
WebAuth — authenticated session
WebAPI — api.steampowered.com wrapper
SteamAuthenticator — 2FA
SteamID — parse / convert Steam IDs
Async / FastAPI / MCP (new in 1.6)
AsyncSteamClient — asyncio facade
Pool — multi-account
MCP — Model Context Protocol tools + FastMCP adapter
Advanced
Security
Every push, PR, and release runs the following gates before any wheel ships to PyPI: ruff + black (style), mypy --strict (types), pytest (unit + integration), deptry (deps hygiene), bandit (Python SAST), pip-audit (CVEs), CodeQL (cross-file SAST), OpenSSF Scorecard (repo posture). A failing gate blocks the publish step.
Report a vulnerability: use GitHub Security Advisories (private, coordinated disclosure). Full policy in SECURITY.md. Do NOT open a public GitHub issue for security reports.
License
MIT — see LICENSE. Unchanged from upstream.
1 maintainer
Metadata
1 maintainer
Release files for pysteam-client 1.8.2
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