Free · OpenAI API users
Know before it blows.
Set a monthly $ ceiling. Get emailed at 50%, 80%, and 100% of it — before a retry loop or a leaked key turns a $12 side project into a $300 surprise.
Fusebox Alerts
You've hit 80% of your $50 ceiling
$40.10 spent this month. $9.90 left before you hit your limit.
Drag to see the alert at any spend level — no key needed to try this80%
Free
$0
- Emailed once you hit 100%
- Unlimited months
Paid
$7/mo
- Everything in Free
- + early warnings at 50% and 80%
less than one avoided $300 surprise
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OpenAI does have a spend alert already — so why this? Theirs is one manually-set number, buried in billing settings, and most people never go find it. Fusebox is live the moment you connect a key, no digging through settings required.
🔒
The key we ask for can't spend a cent. Scoped to
api.usage.read only — it can't touch billing, other keys, or your org's members. Worst case if it ever leaked: someone sees your usage numbers, nothing else.
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One person built and runs this. No investors, no data resale, no ad network — the $7/mo tier is the only way this makes money, so there's no reason to do anything with your data except what the product says it does. If that's not enough to trust it yet, use the slider above first and connect a key only once you actually want the real alerts.
Get started — 3 fields, 2 minutes.
We check the key works before storing anything, then you're armed.
Before you paste a key: create a scoped OpenAI Admin key so we can only ever read, never spend or manage anything.
- Go to
platform.openai.com/settings/organization/admin-keys - Create key → grant only the
api.usage.readscope - Leave every other scope (members, projects, api keys) unchecked
Why Fusebox doesn't support Claude yet →
