Know your AI bill
before it knows you.
Capwatch watches spend and rate limits across Anthropic, OpenAI, Vercel and OpenRouter. It forecasts your month, warns you before a budget or limit, and can pause a runaway key from your phone.
Free plan forever for 1 provider. No card needed.
A budget email after the money is gone is not a guard.
Provider budgets alert late, one provider at a time, often only by email. People report $30 caps that let $592 through. Capwatch watches all of them every 5 minutes and acts before the limit.
Every provider, one screen
Anthropic, OpenAI, Vercel and OpenRouter side by side, per key and per project. Gemini and Sarvam by hand until they ship an API.
Forecast to month end
“You will pass $3,500 around the 23rd.” Weekday-aware once there are two weeks of data.
Alerts before the limit
Budget 50/80/100%, forecast crossing, and rate-limit headroom. By email, Telegram and phone push.
Spike detection
“Spend 5× normal in the last hour” — compared with the same hour on earlier days, so night-time quiet doesn't fool it.
One-tap kill switch
Pause an Anthropic key or a Vercel project straight from the alert on your lock screen. Off by default, confirm first, every action logged.
Model-swap savings
See what this month would cost if your busiest model ran on its cheaper sibling. From your own token mix, not a guess.
Paste a read-only admin key
Encrypted with AES-256 the moment it arrives. We never show it again, and nothing in your code changes.
Set a budget
One for everything, or per provider and project. Pick how you want to hear about it.
Install it on your phone
Add Capwatch to your home screen. Alerts arrive as push notifications with a Pause button.
Half the price of the tools you know. None of the plumbing.
Helicone and Portkey sit in front of every call. Langfuse needs tracing in your code. Capwatch reads the billing data your providers already have.
| Capwatch Pro | $15/mo | Read-only keys |
| Langfuse Core | $29/mo | SDK in your code |
| Portkey Production | $49/mo | Proxy gateway |
| Helicone Pro | $79/mo | Proxy gateway |
Questions
Do I need to change my code or route calls through you?+
No. Capwatch reads the usage and billing data your providers already keep, using an admin key. There is no proxy and no SDK, so it adds zero latency and can't break your app.
Which keys do I need?+
Anthropic: an Admin API key (sk-ant-admin…). OpenAI: an Admin key. Vercel: an access token with billing read. OpenRouter: any key, or a management key to also see credits. Normal API keys can't read usage.
How are my keys stored?+
Encrypted with AES-256-GCM before they touch the database, on our own server in India. They are never shown again in the app, in emails or in logs. Delete a connection and the key is gone.
Can Capwatch stop my spend?+
Only if you turn the kill switch on for that connection. Then it can pause an Anthropic key (you can resume it) or a Vercel project, and delete an OpenAI key (OpenAI has no pause). It always asks you to confirm, unless you set a budget to auto-pause at 100%.
How fresh is the data?+
Paid plans and the trial refresh every 5 minutes. Providers themselves report usage within about 5 minutes and billed cost daily, so the last hour is an estimate from tokens; the bill is the source of truth.
What about Claude Code or ChatGPT subscription limits?+
Those live on your laptop, not in an API we can read safely from the web. Capwatch covers API spend and API rate limits. A small local helper for subscription limits is on the roadmap.
Is there a free plan?+
Yes: 1 provider, daily refresh, email alerts, the forecast and the shareable spend card, free forever. New accounts get 14 days of Pro first.
Can I get a refund?+
Yes. Full refund within 7 days of payment, no questions asked.