# Docs


- **Get Started**
- [Introduction](/docs/introduction): Introduction to PayKit.
- [Installation](/docs/installation): how to install and configure PayKit in your app
- [Quickstart](/docs/quickstart): Getting started with PayKit.

- **Concepts**
- [Plans & Features](/docs/plans-and-features): Define your billing model in code with typed plans, feature grants, and plan groups.
- [Customers](/docs/customers): Sync your app's billing identity into PayKit and keep provider mappings internal.
- [Subscriptions](/docs/subscriptions): Subscribe, upgrade, downgrade, and cancel plans with a single method.
- [Entitlements](/docs/entitlements): Check feature access and track metered usage against plan limits.
- [Webhook Events](/docs/webhook-events): How PayKit handles provider webhooks and fires application events.
- [Database](/docs/database): How PayKit stores and syncs billing state locally.
- [Plugins](/docs/plugins): Extend PayKit with plugins that add endpoints and functionality.
- [Client](/docs/client): Call PayKit from the browser with a typed HTTP client.
- [CLI](/docs/cli): Project initialization and plan management from the command line.
- [TypeScript](/docs/typescript): Type inference, plan ID narrowing, and compile-time safety.

- **Flows**
- [Subscription Billing](/docs/subscription-billing): Implement a complete subscription billing flow with plans, checkout, and plan changes.
- [Metered Usage](/docs/metered-usage): Track and gate usage-based billing with metered features.

- **Plugins**
- [Dashboard](/docs/dashboard): Embedded billing dashboard plugin for PayKit.

## AI Access

- Append `.mdx` to any documentation page URL to get raw Markdown content (e.g. `/docs/introduction.mdx`)
- Full documentation as a single file: `/llms-full.txt`