A menu bar app that warns you before your API credits run out.
If you opt in to update checks, the app sends its app version, macOS version and chip to the signed update feed.
Coming soonFree and open sourcemacOS 26+Apple silicon
Low-balance alerts
Set a number you care about for each tool. Once the balance drops below it, the bird in your menu bar changes color and a notification shows up.
Run-out estimates
After a few readings it works out how fast each balance is going down and roughly when it hits zero: 2 days, 3 weeks. The one that runs out first is at the top of the list.
Local, always.
No signup required. Your API keys stay in your Mac’s Keychain and only go to the tools they belong to.
If you opt in to update checks, the app sends its app version, macOS version and chip to the signed update feed.
A bird’s-eye view
of your credit stack.
Don’t see yours? Ask for it.
Free. Open source. Staying that way.
No signup. No credit card. No “talk to sales.” There is no sales.
Get the bird
I run cold outreach pipelines for a living. Every few weeks a campaign would die at 3am, and after an hour of digging the cause was always the same: one vendor out of ten had quietly run out of credits. Some tools auto-top-up. Some send a warning email. The rest just stop.
So I built it. It sits in the menu bar, watches the balances I care about, and says something while there’s still time. I run it on my own stack every day. It’s free mostly because I can’t picture anyone paying for a balance checker, so if it saves one of your campaigns, tell someone. That’s the entire growth strategy.
Questions.
Reasonable ones, mostly.
What can you do that the tool’s own dashboard can’t?
Three things. We translate balances into deadlines (“burns out in ~3 days,” not “120 left”), watch all your connected tools at once instead of making you check seven tabs, and warn you before the credits hit zero. That’s the whole product.
Will it send me notifications I don’t want?
Notifications are optional. They warn when balances are low, critical or empty, and when a tool can’t be checked. The app needs to be running, and your Mac awake and online.
Does it touch my data, sends, or campaigns?
No. We only read the usage endpoint. We don’t ingest contacts, see message bodies, or touch outbound. Use a scoped key where your tool offers one; plenty only issue an all-or-nothing key, and we won’t pretend otherwise. The whole security model is public.
Which tools don’t you track?
QuotaCanary tracks tools that expose quota through a simple read-only API call. Platforms like RapidAPI that only expose usage through dashboards or traffic headers are out today, because chasing those turns a free tool into a science project. Ship a clean quota endpoint and we’ll add you: Apollo used to be named right here, and now it’s tracked. The directory is the full list; if yours is missing, ask and we’ll take a look.
Do you watch OpenAI or Anthropic?
No. Both tell an API key what you spent this month, never what’s left, and only to an org admin key. We watch balances, not receipts. Buying LLM credit through OpenRouter, DeepSeek or Hyperbolic? Those we watch.
What Mac does it need?
macOS 26 or newer on Apple silicon. There’s an Intel build, but we haven’t tested it on Intel hardware, so we don’t list it as supported.
What does the Mac app send you?
Balance requests go directly to each vendor with that vendor’s key; keys never go to QuotaCanary servers.
If you opt in to update checks, the app sends its app version, macOS version and chip to the signed update feed.
Can I pull my balances into my own scripts or agent?
The self-host web version includes an API and MCP server for its own connections. It cannot read your Mac’s local connections.
It’s open source - can I inspect it and self-host?
Yes. Inspect the source on GitHub or run the web version on your own infrastructure.
Why is it free?
Not everything needs three pricing tiers and a suspiciously popular middle option.
Why a canary?
Birds in coal mines noticed bad air before the miners did, which gave everyone time to leave. Ours does the same job for credit balances. We added singing because it was cuter than the alternative.
Not on a Mac?
Run the web version yourself. You operate the server, database and polling schedule. Its API and MCP server read that instance, not the connections on your Mac.
The bird that sings
before the credits die.
Coming soonFree and open sourcemacOS 26+Apple silicon