What is steam-mcp AGENTS.md?

A repository instruction file for Steam-MCP, a server that lets software access Steam profiles, game libraries, statistics, store information, and Workshop items. Steam is a platform for buying and playing PC games.

Developing or operating Steam profile, library, statistics, store, Workshop, system-status, and chat features.

It documents the available services, ports, login settings, AI chat options, and commands so an agent can work with the project correctly.

How sandraschi/steam-mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to sandraschi/steam-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/sandraschi/steam-mcp/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/sandraschi/steam-mcp

Made for: Codex, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/sandraschi/steam-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/sandraschi/steam-mcp/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/sandraschi/steam-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/sandraschi/steam-mcp/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/sandraschi/steam-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/sandraschi/steam-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 598 This file is loaded in full into every session.

When invoked 598 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00598	$0.00598
Opus 5.5	$0.00239	$0.00239
Sonnet 5.5	$0.00120	$0.00120
Haiku 4.5	$0.00060	$0.00060

Measured 1mo ago against content hash b37e3e131ef5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

steam-mcp AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

AGENTS.md · 49 lines

What it actually says

Steam-MCP Agent Context

Repo

steam-mcp — FastMCP 3.2 portmanteau server for Steam profile, library, stats, store, and Workshop. v0.3.1

Ports

Backend: 11020 (FastAPI + MCP HTTP at /mcp)
Frontend: 11021 (Vite dev; Tauri native uses same webapp)
Env: BACKEND_PORT, FRONTEND_PORT

Auth

STEAM_API_KEY — profile, library, workshop, wishlist
STEAM_ID — default account for own profile / library
Public: store search, app details, news, player counts

AI / chat (webapp)

STEAM_CHAT_MODE — hybrid (default) | llm | rules
AI_PROVIDER, AI_ENDPOINT, AI_MODEL — Ollama / OpenAI-compatible
STEAM_SAMPLING_BASE_URL — fallback for AI_ENDPOINT
STEAM_PREFAB_APPS=0 — disable prefab-ui App tools (dict fallbacks)

Portmanteau tools

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
steam_help, agentic_steam_workflow, Prefab show_* cards

Packaging

manifest.json + just mcpb-pack → dist/steam-mcp.mcpb
glama.json, llms.txt, llms-full.txt — discovery / LLM corpus
native/ — Tauri 2 + PyInstaller sidecar (build-sidecar.ps1, build.ps1)

Layout

src/steam_mcp/services/ — Steam API logic
src/steam_mcp/mcp/tools/ — portmanteau, prefab, prompts, resources, agentic
src/steam_mcp/skills/steam-mcp/SKILL.md — agent skill (also SkillsDirectoryProvider)

Commands

just run — STDIO MCP
just serve — HTTP + REST + MCP
just test / just smoke / just mcpb-pack
just native-dev / just native-build
start.ps1 / webapp/start.ps1 — full stack

Install docs: mcp-central-docs/standards/AGENT_INSTALL_REFERENCE.md

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 49 lines · 598 tokens per session scan A b37e3e131ef5

Subscribe to this mod's changes

steam-mcp AGENTS.md is an instructions file published in the GitHub repository sandraschi/steam-mcp (3 stars, last pushed 10d ago), licensed MIT. It adds 598 tokens to every session, about $0.0024 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Game development fastmcp game-development godot mcp mcp-server steam

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

steam-mcp: Instructions file for Codex