Claude Code Usage Monitor vs IsDown in 2026

Q: Is Codex Forecast free to use?

Codex Forecast is free, with no account and no paid tier . It is a website with a public API that needs no key . The site and API share a snapshot cached for up to five minutes . Its email alerts are free and arrive when a reset actually happens, if you opt in .

Compare Claude Code Usage Monitor and IsDown on what each tracks, what each costs, and what to check before you choose either.

By SupaKeeper · 2026-10-27

SupaKeeper is published by LunarWerx, which makes some of the tools compared here.

Claude Code Usage Monitor watches how close you are to your Claude Code limits while you work, and warns you as they approach. IsDown supplies outage data for many vendors through an API. Codex Forecast is the publisher's product on this page, and it estimates when OpenAI will next reset Codex usage limits.

Option	What its sources say it does	Cost	Account or install
Claude Code Usage Monitor	Real-time Claude Code usage monitor with predictions and warnings ^[1]; default Custom plan tracks token consumption, message counts and cost ^[1]; reset-aware forecasting and pace calculations ^[1]	not published	supports Python 3.9 and later ^[1]; installable with pip ^[1] and uv ^[1]
IsDown	Outage Data API serving real-time and historical outage data from 6,320+ vendors ^[2]	Starter $27/month or $22/month paid annually ^[2]; Pro $49/month or $40/month paid annually ^[2]; Premium $99/month or $80/month paid annually ^[2]; Business $179/month or $150/month paid annually ^[2]; MSP $200/month billed monthly ^[2]	free 14-day trial with no credit card ^[2]; instant 14-day Pro trial on signup ^[2]; education and non-profit get 30% off ^[2]; annual billing saves about 20% ^[2]; full refund if cancelled within 10 days ^[2]; accepts purchase orders and invoices for annual plans ^[2]
Codex Forecast	Estimates when OpenAI resets Codex usage limits ^[3]; combines an account checked every 60 seconds, staff announcements and the OpenAI status page ^[3]	free, no paid tier ^[3]	no account ^[3]; a website with a public API ^[3]

The short answer

Claude Code Usage Monitor watches how much of your Claude Code allowance you use while you work, with predictions and warnings as you get close to a limit ^[1]. Its default plan tracks token consumption, message counts and cost ^[1]. IsDown gives you real-time and historical outage data from many vendors through an API ^[2]. Codex Forecast estimates when OpenAI will next reset Codex usage limits ^[3]. Pick by the question you have: a developer inside a Claude Code session who wants a heads-up before hitting a limit points to Claude Code Usage Monitor, a developer who wants outage data about many services at once points to IsDown, and a developer who wants an estimate of when Codex limits reset points to Codex Forecast.

What Claude Code Usage Monitor, IsDown is built for

Claude Code Usage Monitor provides real-time usage monitoring with predictions and warnings ^[1]. Its default Custom plan monitors three metrics: token consumption, message counts, and cost ^[1]. It supports reset-aware forecasting and pace calculations ^[1]. IsDown's Outage Data API provides real-time and historical outage data from 6,320+ vendors ^[2]. Its Starter plan is for individuals tracking a few services ^[2], and its Pro plan is for small teams monitoring key vendors ^[2].

What Codex Forecast is built for

Codex Forecast is made by the team that publishes this site. It gives a statistical estimate of when OpenAI will next reset Codex usage limits ^[3]. The estimate combines an account it checks every 60 seconds, OpenAI staff announcements and the OpenAI status page ^[3]. When a measured refill and an announcement disagree, it trusts the measured refill ^[3]. Each reset used in the forecast is listed with a link to where it was announced ^[3]. Its named-day predictions are scored in public, misses included ^[3]. You can opt in to free emails that are sent when a reset actually happens ^[3]. A public API that needs no key gives stats, paginated reset history, forecasts and operational health ^[3], with a published OpenAPI specification ^[3]. It is an independent tracker and is not affiliated with OpenAI ^[3].

Pricing and fees

Claude Code Usage Monitor has no price given in the facts, so it is not published here; check its own page for the cost. IsDown's Starter plan is $27 per month, or $22 per month when paid annually ^[2], and its Pro plan is $49 per month, or $40 per month when paid annually ^[2]. The facts given here do not list the price of every IsDown plan, so the full range is not published here. Codex Forecast is free, with no account and no paid tier ^[3]. If you need a price that is not stated here, check the tool's own pages.

Setting it up and daily use

Claude Code Usage Monitor reports usage with predictions and warnings while you use Claude Code ^[1], and its default plan watches token consumption, message counts and cost ^[1]. The facts here do not describe installing or configuring Claude Code Usage Monitor, so check its own pages for that. IsDown's Outage Data API serves real-time and historical outage data from 6,320+ vendors ^[2]. The facts here do not describe the IsDown account setup, so check its own pages. Codex Forecast runs as a website with a public API, so you open it in a browser or call the API for data ^[3]. The site and API share a snapshot that is cached for up to five minutes ^[3], and there is no account and no paid tier to set up ^[3].

Things to check before you choose

Ask which allowance you need to watch. Claude Code Usage Monitor tracks usage within Claude Code sessions ^[1], Codex Forecast tracks when Codex usage limits reset ^[3], and IsDown gives outage data for many vendors ^[2]. Ask what you will install. The facts here do not say how Claude Code Usage Monitor is installed, so check its own pages. Ask what data leaves your machine; Codex Forecast serves a snapshot cached for up to five minutes ^[3]. Ask what each tool costs for your own use, since the facts here give a price for IsDown ^[2] and Codex Forecast ^[3], and none for Claude Code Usage Monitor.

How to choose

A developer who wants a warning inside a Claude Code session as usage climbs fits Claude Code Usage Monitor, which offers real-time monitoring with predictions and warnings ^[1] and tracks token, message and cost usage ^[1]. A developer who wants outage data across many providers fits IsDown, whose API serves real-time and historical data from 6,320+ vendors ^[2]. A developer who wants an estimate of when Codex limits reset fits Codex Forecast ^[3]. If the need is a paid outage data feed, IsDown offers Starter and Pro plans ^[2] ^[2]. If the need is a free estimate of when OpenAI resets Codex limits, Codex Forecast is free with no paid tier ^[3].

Frequently asked questions

Does IsDown's outage data API cover many vendors?

Yes. IsDown's Outage Data API provides real-time and historical outage data from 6,320+ vendors ^[2]. That means a developer can pull outage information for a large set of providers through one API. The facts here give the number of vendors covered and the plan prices ^[2], so check the tool's own pages for limits on how much you can query and for the account steps.

What does Claude Code Usage Monitor track?

Claude Code Usage Monitor keeps an eye on your usage while you work in Claude Code, with predictions and warnings ^[1]. Its default Custom plan tracks three things: token consumption, message counts, and cost ^[1]. The facts here give no price for the tool, so check its own pages for what it costs and how it is installed.

Is Codex Forecast free to use?

Codex Forecast is free, with no account and no paid tier ^[3]. It is a website with a public API that needs no key ^[3] ^[3]. The site and API share a snapshot cached for up to five minutes ^[3]. Its email alerts are free and arrive when a reset actually happens, if you opt in ^[3].

Can Codex Forecast predict when Codex usage limits reset?

Yes. Codex Forecast gives a statistical estimate of when OpenAI will next reset Codex usage limits ^[3]. The estimate combines an account it checks every 60 seconds, OpenAI staff announcements and the OpenAI status page ^[3]. When a measured refill and an announcement disagree, it trusts the measured refill ^[3]. Its named-day predictions are scored in public, misses included ^[3].

How much does IsDown cost?

IsDown's Starter plan costs $27 per month, or $22 per month when paid annually ^[2], and its Pro plan costs $49 per month, or $40 per month when paid annually ^[2]. The facts here do not state a price for Claude Code Usage Monitor, so check its own pages for that. For any IsDown plan, check the tool's own pages for the account setup and limits.

It is free, with no account and no paid tier. ^[3]

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