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+---
+title: Authentik
+description: Add Authentik authorization provider to Aura Auth for authentication and authorization
+---
+
+<Steps>
+
+<Step>
+
+## Authentik OAuth App
+
+### Register the Application
+
+The first step is to create and register an OAuth App on the Authentik Applications to obtain access to the user's resources.
+
+1. Navigate to your Authentik profile and go to **Applications > Applications > New Provider**.
+2. Click **New Application**.
+3. Select **OAuth2/OIDC** as Provider Type
+3. Fill in the "Application name" and "Homepage URL".
+4. Set the **Authorization callback URL** to `http://localhost:3000/auth/callback/authentik`.
+   - _(Make sure to replace `localhost:3000` with your production domain when deploying)_
+5. Click **Register application**.
+6. Ensure you copy the **Client ID** and click **Generate a new client secret**.
+
+</Step>
+
+<Step>
+
+## Installation
+
+Install the package using a package manager like `npm`, `pnpm`, or `yarn`:
+
+```npm
+npm install @aura-stack/auth
+```
+
+</Step>
+
+<Step>
+
+## Environment setup
+
+Now, you must configure the environment variables required by Aura Auth, including the Authentik credentials and the encryption secrets.
+
+```bash title=".env" lineNumbers
+# Aura Secrets
+AURA_AUTH_SECRET="your-32-byte-secret"
+AURA_AUTH_SALT="your-32-byte-salt"
+
+# Authentik Credentials
+AURA_AUTH_AUTHENTIK_CLIENT_ID="your_authentik_client_id"
+AURA_AUTH_AUTHENTIK_CLIENT_SECRET="your_authentik_client_secret"
+```
+
+<Callout type="warn">
+  **CRITICAL SECURITY WARNING:** The `AURA_AUTH_SECRET` and `AURA_AUTH_SALT` variables are used to encrypt and sign user sessions.
+  These MUST be securely generated, highly randomized strings consisting of at least 32 bytes to ensure adequate entropy. Never
+  hardcode these values in your repository. Use a secure generator (like `openssl rand -base64 32`) to create them, and store them
+  exclusively in your secure environment variables manager.
+</Callout>
+
+</Step>
+
+<Step>
+
+## Configure the Auth Instance
+
+Configure the `createAuth` instance inside an `auth.ts` file located at the root of your project. Ensure you explicitly export the `handlers`, `api`, and `jose` objects.
+
+```ts title="auth.ts" lineNumbers
+import { createAuth } from "@aura-stack/auth"
+
+export const auth = createAuth({
+  oauth: ["authentik"],
+})
+
+// Extract the required utilities
+export const { handlers, api, jose } = auth
+```
+
+<Callout type="info">
+  The `handlers` object contains mapping utilities for standard HTTP methods (`GET`, `POST`, `PATCH`) as well as a unified `ALL`
+  handler. This allows you to easily mount the authentication routes across any framework (Next.js, Elysia, Express, etc.).
+</Callout>
+
+</Step>
+
+<Step>
+
+## Customizing the OAuth Provider
+
+If you need to define custom scopes, change the response type, or map profile data differently, you can use the provider's factory function instead of a simple string identifier.
+
+```ts title="auth.ts" lineNumbers
+import { createAuth } from "@aura-stack/auth"
+import { authentik } from "@aura-stack/auth/oauth/authentik"
+
+export const auth = createAuth({
+  oauth: [
+    authentik({
+      authorize: {
+        params: {
+          // Override default scopes
+          scope: "read:user user:email",
+        },
+      },
+    }),
+  ],
+})
+
+export const { handlers, api, jose } = auth
+```
+
+</Step>
+
+<Step>
+
+## Sign In to Authentik (Client & Server)
+
+There are multiple ways to trigger the sign-in flow depending on your ecosystem.
+
+### Sign-in Path (Direct Navigation)
+
+The common route to trigger the auth flow natively without needing a client library is simply navigating the browser to:
+`http://localhost:3000/auth/signIn/authentik`
+
+---
+
+### Client-Side (React, Vue, etc.)
+
+You can utilize the `createAuthClient` utility to programmatically trigger sign-ins. You can also define a `redirectTo` destination.
+
+<Callout type="warn">
+  **Constraint Rule**: The `baseURL` passed into `createAuthClient` MUST exactly match the root domain and path where the HTTP
+  `handlers` expose their endpoints on the server.
+</Callout>
+
+```ts title="components/Login.tsx" lineNumbers
+import { createAuthClient } from "@aura-stack/auth/client"
+
+export const authClient = createAuthClient({
+  baseURL: "http://localhost:3000/auth",
+})
+
+const triggerSignIn = async () => {
+  await authClient.signIn("authentik", {
+    redirectTo: "/dashboard",
+  })
+}
+```
+
+---
+
+### Server-Side (Next.js Actions, Remix Loaders, etc.)
+
+For environments supporting server-side actions, use the programmatic `api.signIn` method securely.
+
+```ts title="actions.ts" lineNumbers
+import { api } from "./auth"
+
+export const serverSignIn = async () => {
+  const response = await api.signIn("authentik", {
+    redirectTo: "http://localhost:3000/dashboard",
+  })
+
+  // Example returning redirect location
+  return response.headers.get("Location")
+}
+```
+
+---
+
+### Session Retrieval
+
+After a user successfully signs in, you can retrieve their session data securely.
+
+**Client-Side:**
+
+```ts
+const session = await authClient.getSession()
+console.log(session?.user) // The authenticated Authentik user profile
+```
+
+**Server-Side:**
+
+```ts
+// Note: You must pass the native Web Request object or Headers!
+const session = await api.getSession(request)
+console.log(session?.user) // Safely retrieved backend session
+```
+
+</Step>
+
+</Steps>
+
+---
+
+## Resources
+
+- [RFC - The OAuth 2.0 Authorization Framework](https://datatracker.ietf.org/doc/html/rfc6749)
+- [Authentik - OAuth 2.0 Provider](https://docs.goauthentik.io/add-secure-apps/providers/oauth2/)
+- [Authentik - Create an OAuth2 Provider](https://docs.goauthentik.io/add-secure-apps/providers/oauth2/create-oauth2-provider/)
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diff --git a/packages/core/src/oauth/authentik.ts b/packages/core/src/oauth/authentik.ts
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+import type { OpenIDProvider, User } from "@/@types/index.ts"
+
+export interface AuthentikProfile {
+  iss: string
+  sub: string
+  aud: string
+  exp: number
+  iat: number
+  auth_time: number
+  acr: string
+  c_hash: string
+  nonce: string
+  at_hash: string
+  email: string
+  email_verified: boolean
+  name: string
+  given_name: string
+  family_name: string
+  preferred_username: string
+  nickname: string
+}
+
+/**
+ * Authentik OpenID Connect Provider
+ *
+ * @see [Authentik - OAuth 2.0 Provider](https://docs.goauthentik.io/add-secure-apps/providers/oauth2/)
+ * @see [Authentik - Create an OAuth2 Provider](https://docs.goauthentik.io/add-secure-apps/providers/oauth2/create-oauth2-provider/)
+ */
+export const authentik = <DefaultUser extends User = User>(
+    options?: Partial<OpenIDProvider<AuthentikProfile, DefaultUser>>
+): OpenIDProvider<AuthentikProfile, DefaultUser> => {
+    return {
+        id: "authentik",
+        name: "Authentik",
+        issuer: "https://authentik.company/application/o/:application_slug/.well-known/openid-configuration,",
+        profile: (profile) =>
+            ({
+                sub: profile.sub,
+                name: profile.name,
+                email: profile.email,
+                image: null,
+            }) as DefaultUser,
+        ...options,
+    }
+}
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