diff --git a/docs/server-actions-plan.md b/docs/server-actions-plan.md
index 2082d69..8797af8 100644
--- a/docs/server-actions-plan.md
+++ b/docs/server-actions-plan.md
@@ -14,6 +14,7 @@
 | `POST /api/komga/libraries/[libraryId]/scan` | `scanLibrary()` | ✅ Done |
 | `POST /api/komga/config` | `saveKomgaConfig()` | ✅ Done |
 | `PUT /api/user/password` | `changePassword()` | ✅ Done |
+| `POST /api/auth/register` | `registerUser()` | ✅ Done |
 
 ---
 
diff --git a/src/app/actions/auth.ts b/src/app/actions/auth.ts
new file mode 100644
index 0000000..f1581cb
--- /dev/null
+++ b/src/app/actions/auth.ts
@@ -0,0 +1,23 @@
+"use server";
+
+import { AuthServerService } from "@/lib/services/auth-server.service";
+import { ERROR_CODES } from "@/constants/errorCodes";
+import { AppError } from "@/utils/errors";
+
+/**
+ * Inscrit un nouvel utilisateur
+ */
+export async function registerUser(
+  email: string,
+  password: string
+): Promise<{ success: boolean; message: string }> {
+  try {
+    await AuthServerService.registerUser(email, password);
+    return { success: true, message: "Inscription réussie" };
+  } catch (error) {
+    if (error instanceof AppError) {
+      return { success: false, message: error.message };
+    }
+    return { success: false, message: "Erreur lors de l'inscription" };
+  }
+}
diff --git a/src/app/api/auth/register/route.ts b/src/app/api/auth/register/route.ts
deleted file mode 100644
index eae0e00..0000000
--- a/src/app/api/auth/register/route.ts
+++ /dev/null
@@ -1,55 +0,0 @@
-import { NextRequest, NextResponse } from "next/server";
-import { AuthServerService } from "@/lib/services/auth-server.service";
-import { ERROR_CODES } from "@/constants/errorCodes";
-import { ERROR_MESSAGES } from "@/constants/errorMessages";
-import { AppError } from "@/utils/errors";
-import logger from "@/lib/logger";
-
-export async function POST(request: NextRequest) {
-  try {
-    const { email, password } = await request.json();
-
-    if (!email || !password) {
-      return NextResponse.json(
-        {
-          error: {
-            code: ERROR_CODES.AUTH.INVALID_USER_DATA,
-            name: "Invalid user data",
-            message: ERROR_MESSAGES[ERROR_CODES.AUTH.INVALID_USER_DATA],
-          } as AppError,
-        },
-        { status: 400 }
-      );
-    }
-
-    const userData = await AuthServerService.registerUser(email, password);
-
-    return NextResponse.json({ success: true, user: userData });
-  } catch (error) {
-    logger.error({ err: error }, "Registration error:");
-
-    if (error instanceof AppError) {
-      return NextResponse.json(
-        {
-          error: {
-            code: error.code,
-            name: error.name,
-            message: error.message,
-          } as AppError,
-        },
-        { status: 400 }
-      );
-    }
-
-    return NextResponse.json(
-      {
-        error: {
-          code: ERROR_CODES.AUTH.REGISTRATION_FAILED,
-          name: "Registration failed",
-          message: ERROR_MESSAGES[ERROR_CODES.AUTH.REGISTRATION_FAILED],
-        } as AppError,
-      },
-      { status: 500 }
-    );
-  }
-}
diff --git a/src/components/auth/RegisterForm.tsx b/src/components/auth/RegisterForm.tsx
index c2489d2..9f18ecd 100644
--- a/src/components/auth/RegisterForm.tsx
+++ b/src/components/auth/RegisterForm.tsx
@@ -9,6 +9,7 @@ import type { AppErrorType } from "@/types/global";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { Button } from "@/components/ui/button";
+import { registerUser } from "@/app/actions/auth";
 
 interface RegisterFormProps {
   from?: string;
@@ -41,24 +42,15 @@ export function RegisterForm({ from: _from }: RegisterFormProps) {
     }
 
     try {
-      // Étape 1: Inscription via l'API
-      const response = await fetch("/api/auth/register", {
-        method: "POST",
-        headers: {
-          "Content-Type": "application/json",
-        },
-        body: JSON.stringify({ email, password }),
-      });
+      // Étape 1: Inscription via Server Action
+      const result = await registerUser(email, password);
 
-      if (!response.ok) {
-        const data = await response.json();
-        setError(
-          data.error || {
-            code: "AUTH_REGISTRATION_FAILED",
-            name: "Registration failed",
-            message: "Erreur lors de l'inscription",
-          }
-        );
+      if (!result.success) {
+        setError({
+          code: "AUTH_REGISTRATION_FAILED",
+          name: "Registration failed",
+          message: result.message,
+        });
         return;
       }