Browser extension · free · open source
Unofficial · not affiliated with AnthropicStop finding your Claude limit by hitting it.
Arken Limit Monitor pins your own Claude.ai usage to the page you are already working in — session, weekly, spend and credits — counts down to the reset, and warns you before the wall. So you finish the thought first.
USAGE CREDITS
one click → folds into a pill at the bottom edge
What it shows
Every limit Claude is counting, in one place
No dashboard, no tab-switching, no digging through settings mid-task.
Your 5-hour window as a ring gauge, with a live “resets in 1h 21m” countdown so you know exactly how much runway is left.
All models at a glance, plus a row for each per-model limit your plan exposes. Rename those rows yourself so they read the way you think.
Month-to-date spend measured against your own spend limit, so an overage never arrives as a surprise.
Current balance, promotional credits, and the dates they expire — the numbers that are easiest to forget you have.
An optional desktop notification when you cross a level you choose. Default is 90%; set it wherever suits your work.
One click folds the card into a small pill docked at the bottom edge of the window. Drag it anywhere — it stays put.
Setup
Installed in about a minute
No account, no API key, no build step. Store listings are in review — until they are live, this is a normal unpacked install.
- Download and unzipUse the download button above. Unzip it somewhere permanent — if you delete the folder later, the extension stops working.
- Open your extensions pageGo to
chrome://extensionsoredge://extensionsin a new tab. - Turn on Developer modeThe toggle sits in the top-right corner of that page.
- Click Load unpackedSelect the unzipped
ArkenLimitMonitorfolder — the one withmanifest.jsoninside it. - Open or refresh claude.aiThe widget docks to the bottom-right corner. That is the whole setup.
extension folder directly if you would rather not download a zip.
Privacy
It reads your numbers. Nothing else, nowhere else.
This extension runs entirely in your browser. It reads only your own usage figures — the same numbers Claude’s own settings page shows you — using the session you are already signed into.
It does not ask for a username, password or API key. It does not read or store authentication cookies. It does not collect, transmit, sell or share any data. There is no external server and no telemetry of any kind. Your settings live in your browser’s local storage, on your machine.
It does not read your conversations, your files, or any other page. It runs on claude.ai and nowhere else.
Questions
The things people ask first
Is this made by Anthropic?
No. It is an independent tool built by ArkenApps, with no affiliation, endorsement or sponsorship from Anthropic. “Claude” is a trademark of Anthropic, used here only to describe what the extension works with.
Will it break?
Possibly. It depends on an interface Anthropic does not document or support, so a change on their side can stop it reporting until it is patched. It fails quietly and shows the last known figures rather than interfering with the page. Being honest about this up front seems better than a pleasant surprise later.
Why isn’t it in the Chrome or Edge store yet?
Store listings are in progress. Until they are published, the unpacked install above is the way in — and it is the same code either way, readable in full on GitHub.
Does it work on Firefox or Safari?
Not yet. It is a Manifest V3 extension, so it works on Chromium browsers: Chrome, Edge, Brave, Arc, Vivaldi and Opera. Safari would need a conversion through Xcode on macOS.
Something shows a wrong number. What do I send you?
Open the settings gear in the widget and press Copy debug info. It copies percentages, reset times and credit figures only — no account or organisation identifiers — so you can paste it straight into a GitHub issue.
What does it cost?
Nothing, and there is no paid tier. If it saves you from a mid-task cutoff you are welcome to buy me a coffee, but the extension has no nags and no locked features.
Know your runway before you need it.
Free, open source, and out of your way until it matters.