Tools
Usage tools you can use without an account.
Client-side utilities for self-serve usage metering. We do not store the numbers you type.
Live
Plan fit
Enter monthly events and meters. We map them to Starter, Pro, or Scale — caps live in code.
Live
Usage MRR calculator
Units × price × customers. Napkin math for the Stripe usage line. Computation stays in the browser.
Live
Metering cliff
See whether you still fit self-serve, or sit above Scale — the highest self-serve tier.
Live
Stripe metered billing
Illustrate the invoice line UsageMill would write. Stripe Billing still collects.
Live
Idempotency checker
Compare two Idempotency-Key values. Same tenant + key counts once. Hard cap is a 4xx.