Billing logic that survives contact with reality.
LOCKNEXA models plans, usage, credits and invoices as data, so pricing changes stop being engineering projects.
Payments infrastructure
Usage metering
Meter events idempotently, aggregate per window, and reconcile against the ledger.
Plan modelling
Plans, add-ons, trials and proration expressed as data, not spreadsheets.
Invoice previews
See exactly what a customer will be charged before the cycle closes.
Test mode
Replay a year of usage in seconds to check a pricing change.
“Usage-based billing for API products used to be someone's quarterly chore. Now it runs itself, and usage metering keeps it honest.”
E. Garcia / Core maintainer
From our blog
Engineering notes, performance numbers and the mistakes we made getting there.
M. Haddad
2026-01-10 · 5 min read
K. Rossi
2026-02-11 · 7 min read
Y. Silva
2026-03-12 · 9 min read