01 / BENEATH THE SURFACE
Find the signal.
Lose the noise.
Your API bill tells a story.
We help you read it.
Open your usage CSV to explore what changed, what’s driving spend, and what deserves a closer look.
Spot the unexpected.
See daily spend spikes and the models behind them.
Understand the details.
Check cache and batch use when your export includes them.
Explore what could change.
Compare model price scenarios, with assumptions in plain sight.
02 / YOUR PRIVATE CHECKUP
Your checkup.
Your device.
One CSV. A clearer picture.
No uploads. No signup. No API key.
Where do I get this file?
- Sign in to the Claude Console and open the usage or cost page (step by step).
- Choose the previous full month.
- Use the export option to download a CSV.
Cost and usage pages need an admin or billing role in the organization. If you do not see them, ask the person who pays the bill.
- Open the Usage page of the OpenAI platform.
- Choose the previous full month. Dates are in UTC.
- Export the data as CSV.
OpenAI explains roles, filters and export in Reviewing API usage and costs.
- Open the Activity page on OpenRouter.
- Choose the previous full month.
- In the options menu at the top right choose Export, then CSV.
OpenRouter describes the export in Activity Export. Step by step
What the file needs. A cost column, or token counts with a model name. Dates enable the spike check. Cache and batch columns enable those checks. Supported formats
No file handy? Try the demo or .
What we read and checked
Items to investigate
Model price scenarios
Estimates from list prices, not money already lost. They assume the same work and token mix, plus about 30% more tokens on Claude's newer tokenizer.
This is exactly what will be copied. It contains totals, model names and dates from your file, so check it before sharing.
Was this useful? Tell us what was useful or confusing. Please do not attach your file.
03 / NOTHING TO HAND OVER
What happens on your device
stays on your device.
- Nothing is sent. The page's security policy forbids it from making any network request (
connect-src 'none'), and your browser enforces that, not us. - Works offline. Load the page, turn off your internet, then open your file. The check still runs.
- Nothing to hand over. No account, no API key, no analytics, nothing stored after you close the tab.
- Source available. Read every line on GitHub.
04 / A LITTLE CLARITY GOES A LONG WAY
Start with clarity.
A free checkup today.
A daily watch on the horizon.
- Reads your usage or cost CSV on this device
- Spend spikes, cache and batch use, model price scenarios
- Shows what it could and could not check
- A check of your Claude and OpenAI spend every day
- An alert the same day when spend jumps or a pricier model shows up
- Runs in your own GitHub account with your own key
Not available yet. Want early access? Write to us and we will tell you when it opens.
Ask for early access