---
title: API Reference
description: Next.js API Reference for the App Router.
url: "https://nextjs.org/docs/app/api-reference"
docs_index: /docs/llms.txt
lastUpdated: 2025-06-16
---

> For an index of all documentation, see [/docs/llms.txt](/docs/llms.txt).

- [Directives](/docs/app/api-reference/directives): Learn how React and Next.js directives define client entry points, Server Functions, and cached output.
- [Components](/docs/app/api-reference/components): API Reference for Next.js built-in components.
- [File-system conventions](/docs/app/api-reference/file-conventions): API Reference for Next.js file-system conventions.
- [Functions](/docs/app/api-reference/functions): API Reference for Next.js Functions and Hooks.
- [Configuration](/docs/app/api-reference/config): Learn how to configure Next.js applications.
- [CLI](/docs/app/api-reference/cli): API Reference for the Next.js Command Line Interface (CLI) tools.
- [Adapters](/docs/app/api-reference/adapters): Build deployment adapters for Next.js platforms and infrastructure.
- [Edge Runtime](/docs/app/api-reference/edge): API Reference for the Edge Runtime.
- [Turbopack](/docs/app/api-reference/turbopack): Turbopack is an incremental bundler optimized for JavaScript and TypeScript, written in Rust, and built into Next.js.

---

For a semantic overview of all documentation, see [/sitemap.md](/sitemap.md)

For an index of all available documentation, see [/docs/llms.txt](/docs/llms.txt)