claude-usage-widget 0.3.6

Desktop widget and CLI that shows real-time Claude Code usage limits and cost.

Claude Usage Widget

A cross-platform desktop widget that displays your Claude Code usage limits in real time. Always-on-top OSD overlay showing session and weekly utilization — built with PySide6 (Qt), so a single pip install works on Linux, macOS, and Windows.

Features

• Single pip install -- no apt/brew/system libraries required, Qt is bundled
• Real API data -- rate-limit utilisation read straight from anthropic-ratelimit-unified-* response headers
• OSD overlay -- transparent, frameless, always-on-top; left-click opens the details popup, right-click shows a context menu
• Detail popup -- usage bars, forecast, 5h/7d sparklines, 90-day heatmap, per-model cost breakdown, top projects, active sessions
• Auto-refresh -- every 30 seconds by default, fully configurable
• Resizable -- scroll wheel on the OSD (0.6x -- 2.0x)
• Draggable -- left-click drag on the OSD
• Cost estimation -- USD equivalent per model, cache savings, pay-as-you-go comparison for flat-fee subscribers
• Usage forecasting -- burn-rate prediction: "At current rate: 2h 30m to limit"
• Per-project breakdown -- top 5 projects by token usage today
• Anomaly detection -- flags days whose utilisation exceeds the 7/90-day baseline
• Cost optimisation tips -- suggests cache-hit-rate improvements and model-mix changes
• Themes -- default, catppuccin-mocha, dracula, nord, gruvbox-dark
• Threshold notifications -- native desktop notifications on crossing 75% / 90%
• Webhooks -- optional POST to Slack / Discord / custom URLs on threshold, daily, or anomaly events
• Localhost JSON API -- optional http://127.0.0.1:8765/usage for tmux / polybar / waybar integrations
• CLI mode -- --json, --field, --export csv for scripts and status bars

Requirements

• Python 3.10+
• Claude Code CLI installed and authenticated (OAuth) — the widget reads the same token from ~/.claude/.credentials.json (or macOS Keychain)

Installation

Any platform (pip — recommended)

pip install --user --upgrade claude-usage-widget
claude-usage              # launches the OSD overlay
claude-usage --version    # 0.3.0

That's it — no apt, no brew, no PyGObject, no rumps. PySide6 ships Qt in the wheel, so the widget is fully self-contained.

macOS (Homebrew — optional)

If you prefer brew over pip:

brew tap bozdemir/tap
brew install claude-usage-widget

From source

git clone https://github.com/bozdemir/claude-usage-widget.git
cd claude-usage-widget
pip install -e .
python3 main.py

Usage

OSD overlay controls

Action	Effect
Left-click	Open the details popup
Left-click drag	Move the OSD
Right-click	Open context menu (Details, Refresh, Opacity, Minimize, Quit)
Scroll up / down	Resize (0.6x -- 2.0x)

Context menu (right-click OSD)

• Details… -- open the detail popup
• Refresh -- force an immediate data refresh
• OSD Opacity -- 100% / 75% / 50% / 25%
• Minimize / Restore -- collapse the OSD to a thin progress strip
• Quit -- exit the widget

Configuration

All settings are optional. Copy config.json.example to config.json and edit the values you want to change:

cp config.json.example config.json

{
    "daily_message_limit": 200,
    "weekly_message_limit": 1000,
    "daily_token_limit": 5000000,
    "weekly_token_limit": 25000000,
    "refresh_seconds": 30,
    "osd_opacity": 0.75,
    "osd_scale": 1.0
}

Setting	Default	Description
refresh_seconds	30	How often to fetch new data from the API (seconds)
osd_opacity	0.75	OSD background opacity (0.15--1.0)
osd_scale	1.0	OSD scale factor (0.6--2.0)
daily_message_limit	200	Daily message limit for local tracking in the popup
weekly_message_limit	1000	Weekly message limit for local tracking in the popup
daily_token_limit	5000000	Daily token limit for local tracking
weekly_token_limit	25000000	Weekly token limit for local tracking
claude_dir	~/.claude	Path to the Claude Code data directory
theme	default	Color theme for the OSD and popup. One of default, catppuccin-mocha, dracula, nord, gruvbox-dark

Keys omitted from config.json fall back to built-in defaults. claude_dir is not included in the example file because the default is correct for most setups.

Themes

The widget ships with 5 built-in color themes. Select one by adding "theme": "<name>" to your config.json:

{
    "theme": "dracula"
}

Available themes:

• default -- the original widget palette (screenshots welcome)
• catppuccin-mocha -- soft pastel dark theme (screenshots welcome)
• dracula -- classic purple-and-pink dark theme (screenshots welcome)
• nord -- cool arctic blue palette (screenshots welcome)
• gruvbox-dark -- warm retro-style dark theme (screenshots welcome)

How It Works

The widget reads your Claude Code OAuth credentials from ~/.claude/.credentials.json (Linux) or the macOS Keychain and makes a minimal API call (max_tokens=1 to claude-haiku-4-5-20251001) to read the rate-limit response headers:

anthropic-ratelimit-unified-5h-utilization: 0.58
anthropic-ratelimit-unified-5h-reset: 1776186000
anthropic-ratelimit-unified-7d-utilization: 0.10
anthropic-ratelimit-unified-7d-reset: 1776690000

These are the same values shown on the claude.ai usage page. The widget also reads local data from ~/.claude/ for message counts, token usage per model, and active session tracking.

How the OSD works

Qt's QWidget with FramelessWindowHint | Tool | WindowStaysOnTopHint plus WA_TranslucentBackground gives us a transparent, borderless floating window that behaves identically on X11, XWayland, native Wayland, macOS, and Windows. All drawing goes through QPainter (drawRoundedRect, drawText), so there's a single code path with no platform shims.

Scale and opacity -- the overlay stores a scale (0.6 -- 2.0, default 1.0) and opacity (0.15 -- 1.0, default 0.75). Scale multiplies every pixel dimension before drawing, so the widget resizes proportionally. Opacity is the alpha channel of the background fill only; bar and text remain at full alpha so they stay legible at low opacity.

Refresh cycle -- a daemon thread wakes every refresh_seconds (default 30), performs the API call, and emits a Qt signal back to the GUI thread (Signal(object)). The GUI thread then updates the OSD and the popup together. User interactions (scroll, drag, right-click) update in place and request an immediate repaint.

Troubleshooting

OSD not visible

• Check if the process is running: ps aux | grep claude-usage (Linux/macOS) or the Task Manager (Windows).
• Try launching from a terminal: claude-usage — any startup error prints to stderr.

Linux: qt.qpa.plugin: Could not load the Qt platform plugin "xcb"

Qt 6.5+ needs one tiny system library that ships separately from the wheel:

sudo apt install -y libxcb-cursor0     # Ubuntu/Debian
sudo dnf install -y xcb-util-cursor    # Fedora
sudo pacman -S xcb-util-cursor         # Arch

Linux: notifications don't appear

The widget shoots notifications via notify-send. Install it if missing:

sudo apt install libnotify-bin    # Ubuntu/Debian
sudo dnf install libnotify        # Fedora
sudo pacman -S libnotify          # Arch

API authentication fails

• Make sure the Claude Code CLI is installed and you are logged in (the claude command should work in a terminal).
• Linux / Windows: the OAuth token is read from ~/.claude/.credentials.json.
• macOS: the OAuth token is read from the Keychain, with a fallback to ~/.claude/.credentials.json.

Contributing

Contributions are welcome. A few guidelines:

• Bug reports — open an issue with your OS, Python version, and the full error output.
• Pull requests — keep changes focused. One fix or feature per PR. Run the widget manually before submitting.
• No new runtime dependencies — PySide6-Essentials is the only runtime dep. Everything else uses the Python stdlib and platform-native CLIs.
• Code style — follow the existing conventions. No formatter is enforced; just match the surrounding code.

License

MIT