Claude Usage Tracker

A Chrome extension that tracks your token usage across Claude Chat, Projects, Cowork, and Design in real time — with desktop alerts before you run low and full trend analytics. > **Independent open-source project. Not affiliated with Anthropic.** --- ## Features - **Live badge** on the toolbar icon showing today's usage as % of your daily average - **Desktop notifications** at configurable thresholds (default 50 🟢 / 75 🟡 / 90 🔴) - **Popup** with today's gauge, per-product breakdown, and one-click dashboard access - **Full dashboard** with daily bars, weekly bars, time-of-day heatmap, and product donut chart - **Product filter** — track only the Claude surfaces you care about - **CSV export** for your own analysis - All data stored **locally** — nothing leaves your browser --- ## How it works The extension intercepts `fetch` calls on `claude.ai` and reads the `input_tokens` / `output_tokens` fields from Anthropic's streaming SSE responses. Message content is never read or stored. Since Anthropic does not expose a public quota API, usage is tracked **relative to your own rolling average** rather than against an absolute limit.