macos-mcp AGENTS.md

macos-mcp AGENTS.md is an instructions file for Codex, OpenCode from surendranb/macos-mcp. It costs 788 tokens per session, scanned C, original, MIT.

A macOS automation server that lets AI coding agents control parts of a Mac through a standard connection. Its instructions cover installation, client setup, notifications, clipboard text, and audio devices.

In plain words
What is it for?
Use it to configure the service for Claude Code, Cursor, Claude Desktop, Antigravity, or other listed agents, and to let them send notifications, read or write plain-text clipboard contents, and inspect or change audio settings.
Why use it?
It removes the need to work out how to install and connect this Mac-control service to different coding agents. It also documents the available system controls.

Instructions file for CodexOpenCode

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/surendranb/macos-mcp/agents-md
Clone the repo
git clone --depth 1 https://github.com/surendranb/macos-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.

agentmods badge for macos-mcp AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/surendranb/macos-mcp/agents-md.svg)](https://agentmods.dev/instructions/surendranb/macos-mcp/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/surendranb/macos-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/surendranb/macos-mcp/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 788 This file is loaded in full into every session.
When invoked 788 The same file — it is already loaded in full.
Security scan C 2 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00788 $0.00788
Opus 5 $0.00394 $0.00394
Sonnet 5 $0.00158 $0.00158
Haiku 4.5 $0.00079 $0.00079

Measured 3d ago against content hash 4114a8af729a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

macos-mcp AGENTS.md scanned grade C with 2 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 3d 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -fsSL "https://macos.builditwithai.xyz/install" | bash

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -fsSL "https://macos.builditwithai.xyz/install" | bash
AGENTS.md · 73 lines

How it starts

The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — Agent Operating Manual

For AI Agents (Claude Code, Cursor, Codex, Gemini, Antigravity, OpenCode, Aider) connecting to or executing macos-mcp.


⚡ 1. Fast Install & Client Wiring (Start Here)

In 90% of cases, you just need to install and configure this MCP server for your user:

# 1-Line Universal Auto-Installer (Configures Claude Code, Cursor, Claude Desktop & Antigravity)
curl -fsSL "https://macos.builditwithai.xyz/install" | bash

# Or launch directly via stdio:
npx -y @surendranb/macos-companion-mcp
uvx macos-companion-mcp

Client Config Snippet (mcp.json / claude_desktop_config.json)

{
  "mcpServers": {
    "macos-companion": {
      "command": "npx",
      "args": ["-y", "@surendranb/macos-companion-mcp"]
    }
  }
}

📖 2. What This Repo Is

A native macOS automation MCP server providing system controls for AI agents on Apple Silicon and Intel Macs.

Primary Tools Available:

  • notify: Dispatch native macOS notifications with title, message, and sound.
  • clipboard_read & clipboard_write: Read from and write plain text to the system clipboard.
  • get_audio_devices & set_volume: Inspect audio inputs/outputs and adjust master volume (0–100).
  • get_frontmost_app & get_open_windows: Inspect active desktop apps and window titles.
  • get_displays: Query screen resolutions, display arrangement, and scale factors.
  • open_url: Open links in the user's default browser or specified application.
  • execute_applescript: Run sandboxed AppleScript / JXA automation scripts.

👤 3. How to Handle the Human (Permissions)

This server requires zero API keys or environment variables. However, macOS requires user permission for automation:

  1. Notifications: The first time notify runs, macOS may ask the user to allow notifications.
  2. Automation & Accessibility: Tools like get_open_windows and execute_applescript require permission in System Settings → Privacy & Security → Accessibility / Automation.
  3. If permission is denied: Inform the human clearly:
    • "Please grant Accessibility permissions to your terminal / IDE in macOS System Settings → Privacy & Security → Accessibility."

Read the full file on GitHub · 73 lines

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.

  1. 3d ago First seen · 73 lines · 788 tokens per session scan C 4114a8af729a

Subscribe to this mod's changes

macos-mcp AGENTS.md is an instructions file published in the GitHub repository surendranb/macos-mcp (0 stars, last pushed 3d ago), licensed MIT. It adds 788 tokens to every session, about $0.0039 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.