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The Application Billing API covers the workflows most integrations need: customer provisioning, plan discovery, subscriptions, payment-gated checkout, cancellation, invoices, and usage events.

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Base URL

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Authentication

All Billing API requests require a Bearer token:
Get your billing API key from the Nozle dashboard under Settings > API Keys.

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Resources

Customers

Create, update, and manage customers

Events

Send usage events for metering

Subscriptions

Assign plans to customers

Plans

Define pricing and charges

Invoices

Retrieve customer invoices

Wallets

Legacy prepaid balances
Use the Nozle API for higher-level checkout, product-credit, entitlement, and margin-intelligence endpoints.