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Nozle is billing infrastructure for AI products. It combines usage metering, subscriptions, product credits, entitlements, payments, and unit-economics reporting behind one API and SDK surface.

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Who is Nozle for?

Nozle is built for AI companies that:
  • Bill customers based on API calls, tokens, compute time, or other usage metrics
  • Need visibility into per-customer and per-model costs
  • Want feature gating and usage limits without building entitlement logic from scratch
  • Use Stripe for payments and need managed checkout flows

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Key capabilities

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Architecture

Nozle is built around two layers:
  1. Nozle API — The backend for checkout, subscriptions, credits, entitlements, margin analytics, and usage ingestion. Runs at api.nozle.app.
  2. SDKs — Client and server libraries that connect your application to Nozle.
You interact with Nozle through the SDKs or REST API — all the complexity of billing, entitlements, and margin lives behind a single API surface.

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SDKs

Nozle ships three SDKs:
  • @nozle-js/react — Public catalog, checkout orchestration, pricing, usage, and presentational gate components.
  • @nozle-js/node — Server-side billing, credits, subscriptions, event tracking, entitlements, and margin queries.
  • nozle-sdk (Python) — Typed server-side access to the same core billing and credit workflows.

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Production URLs

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Next steps

Head to the Quickstart to track your first event and connect checkout, or read Architecture for a deeper look at the trust boundaries and data flow.