Hermes Computer Use

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CI PyPI License: MIT Python 3.11+ Platform: WSL2 Ubuntu

Scope: Windows 11 + WSL2 Ubuntu 22.04 / 24.04 only. See docs/WSL_SETUP.md.

Pixel-level browser automation MCP server. Gives any MCP-speaking agent (hermes-agent, Claude Code, Codex, …) 21 tools to drive a real Chrome browser in an Xvfb display — screenshots as vision input, OS-level mouse/keyboard as output. No CDP. No navigator.webdriver. No DOM shortcuts.

What the GIF shows — an agent opens Chrome, focuses the Google search bar, types snp500, presses Enter, and Google returns a full SERP with the live S&P 500 index card. The same flow routinely trips "unusual traffic" or a captcha for Playwright-driven automation. This stack doesn't get flagged because the browser is stock Chrome driven by stock X11 input — there is no automation fingerprint to detect.

Why this exists

	Playwright / CDP	hermes-computer-use
navigator.webdriver	true (detectable)	undefined
CDP endpoint open	yes	no
DOM access	direct (fast, brittle to markup changes)	screenshot only (slower, resilient to UI rewrites)
Anti-bot footprint	large, constantly patched	near-zero: stock Chrome + stock X input
Best for	flows on sites you own	agents operating unfamiliar sites like a human

If your automation has to walk a signup funnel on a site guarded by Cloudflare, Kasada, reCAPTCHA, or DataDome, this stack usually passes where Playwright gets stopped.

Evidence: docs/assets/demo-sannysoft.png — bot.sannysoft.com fingerprint panel with WebDriver, Chrome runtime, Permissions, Plugins, Languages, and PHANTOM all passed.

Architecture

agent ── stdio MCP ──▶ hermes_computer_use.server ── subprocess ──▶ xdotool / scrot
                                                                        │
                                                                        ▼
                                                                    Xvfb :99
                                                                        │
                                                     ┌──────────────────┼──────────────────┐
                                                     ▼                                     ▼
                                               x11vnc :5900                    websockify + noVNC :6080
                                          (native VNC clients)                 (browser viewer)

Longer version: docs/ARCHITECTURE.md.

Install

Prerequisites: Windows 11, WSL2 with Ubuntu 22.04/24.04, systemd enabled. Full walkthrough: docs/WSL_SETUP.md.

Everything below runs inside the WSL shell.

From PyPI

pip install "hermes-computer-use[novnc]"

You still need system packages (Xvfb, Chrome, xdotool…) and systemd units — see source install steps 1 & 4.

From source

git clone https://github.com/Noah3521/hermes-computer-use.git ~/hermes-computer-use
cd ~/hermes-computer-use

bash scripts/setup.sh                            # 1. apt + Chrome + uinput (sudo)
python3 -m venv .venv && . .venv/bin/activate
pip install -e ".[novnc]"                        # 2. Python package
bash scripts/install-novnc.sh                    # 3. (optional) web viewer

mkdir -p ~/.config/systemd/user                  # 4. persistent services
cp systemd/*.example ~/.config/systemd/user/
# edit the paths inside to match your clone, then:
sudo loginctl enable-linger "$USER"
systemctl --user daemon-reload
systemctl --user enable --now computer-use.service novnc.service

Smoke test: python examples/smoke_test.py.

Wire to an MCP client

Copy the relevant snippet from config/hermes.yaml.example into your agent's MCP server config. Works with hermes-agent, Claude Code, Codex, mcp-inspector, or any stdio MCP client.

Hand the install to an LLM

If your agent has shell + filesystem tools, you can skip the manual install entirely: paste the prompt in docs/LLM_SETUP_PROMPT.md and it will clone, install, wire up systemd, run the smoke test, and report back. Available in English, 日本語, 中文, 한국어.

Tools (30)

Category	Tools
Status	screen_info, cursor_position
Capture	screenshot
Pointer	move, left_click, right_click, double_click, middle_click, drag, scroll
Keyboard	type_text, press_key, hold_key, clear_field, select_all, copy, paste, cut, undo, redo, clipboard_set, clipboard_get
Timing	wait
Browser	open_url, new_tab, close_tab, back, forward, reload
Escape hatch	run_shell
Optional DOM fast-path (CU_ENABLE_CDP=1)	dom_click, dom_type, dom_query, dom_exists, dom_wait, dom_eval, network_capture, console_messages

press_key accepts case-insensitive names and aliases — Backspace, backspace, BackSpace all work; cmd+a, command-a, ctrl+a all resolve; meta/win/windows/cmd map to Super.

Opt-in DOM fast-path

For DOM-heavy pages where vision grounding is slow or fragile (SPA dashboards, deep forms), you can opt into CSS-selector-based clicks / typing / queries. Trade-off: Chrome exposes a DevTools port and navigator.webdriver flips to true for the session, which defeats the anti-bot posture on sites that fingerprint Chrome. Off by default.

CU_ENABLE_CDP=1 bash scripts/display.sh restart
pip install "hermes-computer-use[dom]"        # adds websocket-client
# Run the MCP with CU_ENABLE_CDP=1 in its env too (hermes config etc.)

See docs/ARCHITECTURE.md#dom-fast-path for when to use which.

Demo prompts

Try any of the prompts in examples/demo_prompts.md. The simplest and most illustrative:

"Use computer_use to open Google, search for snp500, and tell me the current S&P 500 index price from the page."

Open http://localhost:6080/vnc.html in a browser while the agent runs — watching the cursor arc through the search bar is surprisingly compelling.

Configuration (env vars)

Var	Default	Meaning
CU_DISPLAY	99	X display number
CU_WIDTH / CU_HEIGHT	1440 / 900	Virtual screen size
CU_VNC_PORT	5900	x11vnc listen port
CU_STATE_DIR	/tmp/hermes-computer-use	Logs, PID files
CU_PROFILE_DIR	$CU_STATE_DIR/chrome-profile	Persistent Chrome profile
CU_START_URL	about:blank	First URL Chrome opens
CU_INPUT	xdotool	Set to ydotool for /dev/uinput input
CU_KEY_DELAY_MS	25	Inter-keystroke delay
CU_MOVE_STEPS	18	Cursor interpolation steps

Docs

• WSL_SETUP.md — Windows-side setup, systemd, linger
• ARCHITECTURE.md — internals + design rationale
• CAPTCHA.md — what passive / behavioural / visual challenges this approach can and cannot handle
• TROUBLESHOOTING.md — common failure modes with fixes
• FAQ.md — Playwright comparison, anti-bot honesty, parallel runs, profile safety
• SECURITY.md — threat model and hardening checklist

Security

This is an LLM with hands. Read SECURITY.md. Baseline:

• Run in an isolated WSL distro, not your daily driver.
• Strip run_shell if the agent doesn't need shell access.
• Don't persist real credentials in CU_PROFILE_DIR.

Contributing

See CONTRIBUTING.md. The guiding thesis is "emit no abnormal signals by default" > "emit clever evasions" — but additive hybrid paths (e.g. opt-in DOM / CDP fast-clicks that users turn on per-site) are welcome when they do not flip the default posture.

License

MIT. See LICENSE.

Acknowledgements

• anthropic-quickstarts/computer-use-demo — the reference loop.
• x11vnc + noVNC — observer pipeline.
• Model Context Protocol — the interface.