claude-usage-tray

Windows system tray indicator for Claude Code session + weekly usage %. Live color-coded dot next to your clock, local SQLite history, interactive stats.

What it does

• 🟢 Colored dot in the Windows tray that reflects your current 5-hour session usage (🟢 <50% → 🟡 50–80% → 🟠 80–95% → 🔴 >95%)
• 🕑 Tooltip on hover: current session %, reset countdown, weekly % across all models
• 📊 Stats report on right-click "View stats…": line chart of session % over time, hourly heatmap, velocity (%/h), ETA-to-100%
• 💾 Local SQLite stores every snapshot — all your historical usage is yours
• 🚀 Optional autostart with Windows (HKCU registry, no admin needed)

Quick start

npx claude-usage-tray

Or grab the binary directly from the Releases page.

How it gets the data

This tool reads your Claude Code CLI's local OAuth credentials (~/.claude/.credentials.json) and calls Anthropic's undocumented usage endpoint (the same one the Claude desktop app uses for the Settings → Usage view).

• No new credentials — it piggy-backs on your existing Claude Code auth.
• No data leaves your machine except the usage check itself, directly to api.anthropic.com.
• No telemetry, no analytics server.

⚠️ The endpoint is undocumented. It may be removed or changed by Anthropic without notice. Rate limits are aggressive (~5 calls, then 429 for ~30 min) — polling is intentionally throttled to every 5 minutes.

Requirements

• Windows 10 / 11 (Linux / macOS builds are best-effort)
• Claude Code CLI installed and logged in (~/.claude/.credentials.json present)

Configuration

The first run creates %APPDATA%\claude-usage-tray\config.toml. You can edit:

api_poll_secs = 300          # minimum 300 — do not lower
local_poll_secs = 60
retention_days = 90
autostart = false
alert_threshold_pct = 90.0

Database lives at %APPDATA%\claude-usage-tray\usage.sqlite (WAL mode, readable by other SQLite tools).

Build from source

cargo build --release --bin claude-usage-tray
# Output: target\release\claude-usage-tray.exe

Architecture

• crates/core — domain types, SQLite storage, OAuth fetch, analytics queries, HTML report generation. Pure Rust lib, UI-agnostic.
• crates/tray — winit event loop + tray-icon integration, polling thread, tooltip/icon updates.
• npm/ — thin Node wrapper that downloads the platform binary on install and spawns it via npx.

┌─ Main thread (winit event loop) ───────────────────────┐
│   TrayIcon + Menu + UserEvent dispatch                 │
└─────────▲───────────────────────────▲──────────────────┘
          │ UserEvent::Poller(snap)   │ Menu / Tray events
          │                           │
┌─────────┴───────────┐  ┌────────────┴────────────────┐
│ Update forwarder    │  │ tray-icon global channels   │
│ (update_rx → proxy) │  └─────────────────────────────┘
└─────────▲───────────┘
          │ PollerUpdate
┌─────────┴───────────────────────────────────────────────┐
│ Poller thread                                           │
│  - Fetch usage every ≥5 min (API)                       │
│  - Insert into SQLite                                   │
│  - Backoff exponentially on 429                         │
└─────────────────────────────────────────────────────────┘

License

MIT © 2026 Laurent Rochetta

Acknowledgments

• tray-icon by the Tauri team
• claude-code-statusline for pioneering the OAuth usage endpoint
• ccusage for the JSONL-based estimation approach