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zitadel/apps/docs/content/sdk-examples/nextjs.mdx
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d8ea041c56 docs: introduce versioned docs and migrate to fuma (#11166)
## Todos for release

- [x] Configure Env in docs project on vercel
- [x] Configure Root Path in the docs project on vercel
- [ ] Remove old CSP https://github.com/zitadel/website/pull/1592

## What we did

This pull request migrates the project documentation from the old
`docs/` directory to the new `apps/docs/` directory, introduces a new
documentation system built with Next.js and Fumadocs, and updates all
relevant references, configuration files, and documentation to reflect
this change. It also adds new configuration and ignore files for the new
documentation app, updates CI and linting to exclude the new docs from
certain checks, and revises the contributing guidelines accordingly.

**Documentation System Migration and New Docs App**

* Migrated all documentation from `docs/` to `apps/docs/`, and updated
all references in `README.md`, `CONTRIBUTING.md`, and other files to
point to the new location.
[[1]](diffhunk://#diff-eca12c0a30e25b4b46522ebf89465a03ba72a03f540796c979137931d8f92055L585-L640)
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[[5]](diffhunk://#diff-b335630551682c19a781afebcf4d07bf978fb1f8ac04c6bf87428ed5106870f5L30-R30)
* Added a new Next.js/Fumadocs-based documentation app under
`apps/docs/`, including core app files, layouts, routing, search API,
and a comprehensive `README.md` with development and contribution
instructions.
[[1]](diffhunk://#diff-5a1b07344a2c1b4d3f37b23ff1388b62cd9f57dea3c1cd23d8a0412b7602b132R1-R74)
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[apps/docs/app/[[...slug]]/layout.tsxR1-R81](diffhunk://#diff-59e08acde4e805b7aeccef1dcf98f1d71dfc550777e6b9402085cee0e9fa4e0aR1-R81),
[apps/docs/app/[[...slug]]/page.tsxR1-R79](diffhunk://#diff-e5df3f80d0fa01e12d63d81f29c57a9d14e846c78fd3beabb2ef768e38fd9580R1-R79),
[[4]](diffhunk://#diff-389b34918e040cacaa87cd7201ffa462cc2b0b716736f537e3d3c660ac69353bR1-R7)
[[5]](diffhunk://#diff-d3b03416d1c457b19f1c27b26f2db741412df841b875c26ccadc36e4522247f4R1-R29)
[[6]](diffhunk://#diff-c8fb8339570a5305809be7c618e14705fd86390dc278e6ce8ba224a7bc8b0c3cR1-R25)

**Configuration and Tooling Updates**

* Updated `.github/workflows/codeql.yml`, `.golangci.yaml`, and
`.github/dependabot.yml` to properly handle the new docs app: excluded
`apps/docs` from certain checks, added npm dependency updates for the
docs app, and excluded generated content.
[[1]](diffhunk://#diff-12783128521e452af0cfac94b99b8d250413c516ec71fe6d97dbea666ff7ba27L8-R14)
[[2]](diffhunk://#diff-9917ddc9f1c3304218f7269265b746d997c5c0615478177b5fceecd33ef47cb5R5-R6)
[[3]](diffhunk://#diff-9917ddc9f1c3304218f7269265b746d997c5c0615478177b5fceecd33ef47cb5R126-R129)
[[4]](diffhunk://#diff-dd4fbda47e51f1e35defb9275a9cd9c212ecde0b870cba89ddaaae65c5f3cd28R89-R106)
* Updated `.devcontainer/devcontainer.json` to use the latest Go 1.25.3
version for consistency.

**Licensing and Miscellaneous**

* Added `apps/docs/` to the list of licensed directories in
`LICENSING.md`.

These changes ensure the documentation is now maintained in a modern,
scalable system and all project tooling is updated to support the new
structure.

---------

Co-authored-by: Federico Coppede <[email protected]>
2026-01-29 08:38:36 -08:00

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---
title: Next.js
sidebar_label: Next.js
framework_url: https://nextjs.org
auth_library: next-auth
auth_library_url: https://next-auth.js.org
example_repo: https://github.com/zitadel/example-auth-nextjs
auth_flow: pkce
status: stable
---
## Overview
[Next.js](https://nextjs.org) is a React framework for building full-stack web applications. This example demonstrates how to integrate **Zitadel** using the **[OAuth 2.0 PKCE flow](https://oauth.net/2/pkce/)** to authenticate users securely and maintain sessions across your Next.js application.
#### Auth library
This example uses **[next-auth](https://www.npmjs.com/package/next-auth)** with **[openid-client](https://www.npmjs.com/package/openid-client)** to implement the [OpenID Connect (OIDC)](https://zitadel.com/docs/apis/openidoauth/endpoints) protocol, manage [PKCE](https://oauth.net/2/pkce/) code challenge generation, perform secure token exchange, and provide session management helpers.
---
## What this example demonstrates
This Next.js application demonstrates a secure authentication flow using Zitadel with the industry-standard [PKCE flow](https://oauth.net/2/pkce/). Users start on a public landing page, initiate login via the Zitadel authorization server, and after successful authentication are redirected back to a protected profile page displaying their [user information and claims](https://zitadel.com/docs/apis/openidoauth/claims).
The application implements session management using NextAuth.js with a JWT-based session strategy. It includes automatic callback handling with secure token exchange, route protection for authenticated-only pages, and an example of requesting additional [OIDC scopes](https://zitadel.com/docs/apis/openidoauth/scopes) (including `offline_access` for refresh tokens and Zitadel-specific scopes for metadata and roles).
The logout flow implements **[federated logout](https://zitadel.com/docs/guides/integrate/login/oidc/logout)** via the end-session endpoint, terminating both the local session and the Zitadel session before redirecting the user back to the application. It also demonstrates automatic token refresh to maintain long-lived sessions without requiring users to re-authenticate.
---
## Getting started
### Prerequisites
Before running this example, you need to create and configure a PKCE application in the [Zitadel Console](https://zitadel.com/docs/guides/manage/console/overview). Follow the PKCE application setup guide to:
1. Create a new Web application in your [Zitadel project](https://zitadel.com/docs/guides/manage/console/projects)
2. Configure it to use the PKCE authentication method
3. Set up your redirect URIs (e.g., `http://localhost:3000/api/auth/callback/zitadel` for development)
4. Configure post-logout redirect URIs (e.g., `http://localhost:3000/api/auth/logout/callback`)
5. Copy your **Client ID** for use in the next steps
6. Optionally enable [refresh tokens](https://zitadel.com/docs/apis/openidoauth/grant-types#refresh-token) in Token Settings for long-lived sessions
> **Note:** Make sure to enable **Dev Mode** in the [Zitadel Console](https://zitadel.com/docs/guides/manage/console/overview) if you're using HTTP URLs during local development. For production deployments, always use HTTPS URLs and disable Dev Mode.
### Run the example
Once you have your [Zitadel application configured](https://zitadel.com/docs/guides/integrate/login/oidc/login-users):
1. Clone the [repository](https://github.com/zitadel/example-auth-nextjs).
2. Create a `.env.local` file (copy from `.env.example`) and configure it with the values from your [Zitadel application](https://zitadel.com/docs/guides/manage/console/applications). Use these environment variable names exactly as shown:
```
NODE_ENV=development
PORT=3000
SESSION_SECRET=your-very-secret-and-strong-session-key
SESSION_DURATION=3600
ZITADEL_DOMAIN=https://your-zitadel-domain
ZITADEL_CLIENT_ID=your-zitadel-application-client-id
ZITADEL_CLIENT_SECRET=your-randomly-generated-client-secret
ZITADEL_CALLBACK_URL=http://localhost:3000/api/auth/callback/zitadel
ZITADEL_POST_LOGIN_URL=/profile
ZITADEL_POST_LOGOUT_URL=http://localhost:3000/api/auth/logout/callback
NEXTAUTH_URL=http://localhost:3000
```
Replace these values with:
- Your actual [Zitadel instance URL](https://zitadel.com/docs/guides/manage/console/default-settings) (the **ZITADEL_DOMAIN**)
- The **Client ID** you copied when creating the application
- A randomly generated **SESSION_SECRET** using: `node -e "console.log(require('crypto').randomBytes(32).toString('hex'))"`
- A randomly generated **ZITADEL_CLIENT_SECRET** (required by Auth.js / NextAuth.js even though PKCE doesn't require it)
- The **redirect URIs** you configured in the PKCE setup (must match exactly)
3. Install dependencies using [npm](https://www.npmjs.com) by running `npm install`, then start the development server with `npm run dev` to verify the authentication flow end-to-end at `http://localhost:3000`.
---
## Learn more and resources
* [PKCE concept](https://oauth.net/2/pkce/)
* [Federated logout](https://zitadel.com/docs/guides/integrate/login/oidc/logout)
* [OIDC integration guide](https://zitadel.com/docs/guides/integrate/login/oidc/login-users)
* [Next.js documentation](https://nextjs.org)
* [NextAuth.js documentation](https://next-auth.js.org/)
* [Example repository](https://github.com/zitadel/example-auth-nextjs)