What does this tool retrieve?

It calls the provider's usage endpoint for your chosen date range and aggregates the returned token counts by day, then sums them and projects forward based on the daily average.

Where does my API key go?

Your key is held only in your browser for the request and sent directly to OpenAI or Anthropic over HTTPS. It is never sent to this site's servers, stored, or logged.

Why might I get a permission error?

Usage endpoints require an admin or organization-scoped key. A standard project key without usage read permission will return a 401 or 403. Use a key with the appropriate scope.

How is the projection calculated?

It averages the daily token total over the selected range and multiplies by 30. It is a simple straight-line estimate — actual usage will vary with traffic, so treat it as a planning figure.

Does this work for CORS?

Provider usage endpoints may restrict browser origins. If a request is blocked by CORS the tool reports the error; in that case run the same query from a server or the provider dashboard.

API Key Usage Auditor

API key usage auditor

See where your tokens actually go. With your own OpenAI or Anthropic key, this auditor pulls recent usage straight from the provider, aggregates it by day, totals your consumption over the selected range, and projects next month’s volume from the trend — all without your key ever touching this site’s servers.

How it works

Both providers expose a usage endpoint that reports historical token consumption. The tool requests your chosen date range, sums the per-bucket token counts into a daily series, and derives a forward estimate:

total_tokens   = Σ daily_tokens
daily_average  = total_tokens / days_in_range
projection_30d = daily_average × 30

The request goes directly from your browser to the provider over HTTPS using the key you paste, so nothing is intermediated or stored here.

Tips and notes

Use an admin-scoped key. Usage endpoints need organization or admin read permission; a plain project key will be rejected.
Short ranges load faster. A 7- or 14-day window returns quickly and is enough to spot a trend; widen it only when you need a fuller picture.
Pair with cost figures. Multiply the projected tokens by your model’s price to turn the volume forecast into a dollar budget.