Live Claude plan usage (5-hour + 7-day windows) in your macOS menu bar.

Anthropic's Pro / Max plans run on a rolling 5-hour window plus a weekly quota, with metered "extra usage" billing on top. The only place to see where you stand is claude.ai/settings/usage. claude-meter shows those numbers live in your menu bar and as a CLI.

Pick one of the two routes below.

brew install --cask m13v/tap/claude-meter

Then load the extension in each browser you use with Claude (Chrome, Arc, Brave, Edge):

1. Clone this repo: git clone https://github.com/m13v/claude-meter
2. Open chrome://extensions (or arc://extensions, etc.)
3. Enable Developer mode (top right)
4. Load unpacked → select the extension/ folder
5. Pin the ClaudeMeter icon if you want the popup

The extension fetches your usage using your existing claude.ai cookies and pushes it to the menu-bar app over localhost:63762. No passwords, no keychain prompts, no new logins.

brew install --cask m13v/tap/claude-meter

On first launch, macOS asks:

ClaudeMeter wants to use the confidential information stored in "Chrome Safe Storage" in your keychain.

Click Always Allow. The app then reads your Chrome cookie database directly and decrypts the session cookie. Works without the extension, but the prompt is broad because "Chrome Safe Storage" is Chrome's master key for cookies, saved passwords, and credit cards. Click Deny → the app has no data source and shows !.

• No telemetry, no analytics, no network egress beyond claude.ai itself.
• All cookies, tokens, and API responses stay on your machine.
• The menu-bar app's bridge (127.0.0.1:63762) is localhost-only.
• Open source (MIT), audit it.

The brew cask also installs a claude-meter CLI next to the app:

/Applications/ClaudeMeter.app/Contents/MacOS/claude-meter
/Applications/ClaudeMeter.app/Contents/MacOS/claude-meter --json

Prints the same data as the menu bar, one-shot, machine-readable with --json.

1. Via extension (Route A): the extension runs every 60 seconds, fetches /api/organizations/{uuid}/usage with your logged-in cookies, and POSTs the snapshot to the menu-bar app over localhost.
2. Via keychain (Route B): the menu-bar app shells out to security find-generic-password to get Chrome's Safe Storage AES key, locates the profile logged into claude.ai, decrypts its cookies, and calls the same endpoints itself (Chromium-family browsers only).

The menu-bar app identifies which browser sent each POST by looking up the peer TCP socket's owning process, so Chrome and Arc get labeled correctly without any user configuration.

• macOS only. Linux/Windows not planned.
• Safari uses .binarycookies under Full Disk Access; not supported yet.
• Endpoints are undocumented; Anthropic can change them at any time.
• Session cookies expire; log back into claude.ai in your browser and the extension picks it up.

git clone https://github.com/m13v/claude-meter
cd claude-meter
cargo build --release
# CLI:  ./target/release/claude-meter
# App:  bash scripts/build-app.sh

MIT. See LICENSE.