AI Tool Atlas
Usage tracker

FuelGauge

Chrome and Firefox extension that shows the remaining Claude budget, pace and depletion estimate in the toolbar; free, with a $9 one-time Pro.

Author
FuelGauge
Works with
Claude app (claude.ai)
Documented
Oct 28, 2026
Official docs ↗ Registry ↗

What FuelGauge is

FuelGauge is a browser extension that tracks your Claude usage budget in real time: a toolbar gauge with the remaining percentage, a pace ratio, a depletion estimate and under-use alerts. It uses your active Claude login to poll Claude's usage API and stores data locally in the browser. The free tier includes the gauge, pace tracking, depletion ETA, desktop notifications, 30-minute polling and 30 days of local history; Pro is a $9 one-time payment with historical charts, push notifications, session reset alerts, configurable thresholds, cloud sync and 1-minute polling.

What it does

How FuelGauge plugs in: which agents run it and what it addsRUNS INYour agentClaude app (claude.ai)one host documentedTRACKERFuelGaugeShows how much of a plan's usage…3 install steps1 permission noteWHAT IT ADDSWhat it doesToolbar gauge with remaining budg…Pace ratio and depletion estimateUnder-use alerts before a resetPro: historical charts, push noti…agent → extension → new capability · from the official repository or docs
Where FuelGauge runs and what it adds, from its documentation
  • Toolbar gauge with remaining budget percentage
  • Pace ratio and depletion estimate
  • Under-use alerts before a reset
  • Pro: historical charts, push notifications, reset alerts, cloud sync

When to use it

Good fit

  • You want a pace estimate, not just a percentage, for the five-hour and weekly windows

Not for

  • Claude Code in the terminal

How to install FuelGauge

You need: Chrome or Firefox with an active claude.ai login

  1. Chrome: install from the Chrome Web Store listing
  2. Firefox: install from Firefox Add-ons
  3. Sign in to claude.ai in the same browser

Permissions and security

What it can access

  • Uses your active Claude session to poll the usage API; the site says it reads only usage percentages and timestamps

Security notes from the maintainers

  • Source code and license are not stated on the site

Review the source before granting an agent access to credentials or production systems. We document what the maintainers state; we do not audit code.

Limitations

  • Polls an undocumented usage API that may change

Tools it extends

Frequently asked questions

Is FuelGauge free?

The site lists a free tier and a $9 one-time Pro tier with extra charts, push notifications and cloud sync.

What does the free tier of FuelGauge include?

The gauge, pace tracking, depletion ETA, desktop notifications, 30-minute polling and 30 days of local history, per the site's comparison table.

Is FuelGauge open source?

Not stated on the site; no repository or license is listed.

Sources and gaps