diff --git a/server/api/auth/login.post.ts b/server/api/auth/login.post.ts
new file mode 100644
index 0000000..817fbf2
--- /dev/null
+++ b/server/api/auth/login.post.ts
@@ -0,0 +1,56 @@
+import { PrismaClient } from '@prisma/client';
+import { verifyPassword } from '../utils/password';
+import { useSession } from 'h3';
+
+const prisma = new PrismaClient();
+
+export default defineEventHandler(async (event) => {
+  const body = await readBody(event);
+  const { email, password } = body;
+
+  // 1. Validate input
+  if (!email || !password) {
+    throw createError({
+      statusCode: 400,
+      statusMessage: 'Email and password are required',
+    });
+  }
+
+  // 2. Find the user
+  const user = await prisma.user.findUnique({
+    where: { email },
+  });
+
+  if (!user) {
+    throw createError({
+      statusCode: 401, // Unauthorized
+      statusMessage: 'Invalid credentials',
+    });
+  }
+
+  // 3. Verify the password
+  const isPasswordValid = await verifyPassword(password, user.password);
+  if (!isPasswordValid) {
+    throw createError({
+      statusCode: 401,
+      statusMessage: 'Invalid credentials',
+    });
+  }
+
+  // 4. Create and update the session
+  const session = await useSession(event, {
+    password: process.env.SESSION_PASSWORD || 'your-super-secret-32-character-password', // Should be in .env
+    maxAge: 60 * 60 * 24 * 7, // 1 week
+  });
+
+  await session.update({
+    user: {
+      id: user.id,
+      email: user.email,
+    }
+  });
+
+  // 5. Return user data
+  const { password: _password, ...userWithoutPassword } = user;
+  return { user: userWithoutPassword };
+});
diff --git a/server/api/auth/logout.post.ts b/server/api/auth/logout.post.ts
new file mode 100644
index 0000000..3498ba9
--- /dev/null
+++ b/server/api/auth/logout.post.ts
@@ -0,0 +1,11 @@
+import { useSession } from 'h3';
+
+export default defineEventHandler(async (event) => {
+  const session = await useSession(event, {
+    password: process.env.SESSION_PASSWORD || 'your-super-secret-32-character-password',
+  });
+
+  await session.clear();
+
+  return { message: 'Logged out successfully.' };
+});
diff --git a/server/api/auth/me.get.ts b/server/api/auth/me.get.ts
new file mode 100644
index 0000000..9e0de6c
--- /dev/null
+++ b/server/api/auth/me.get.ts
@@ -0,0 +1,38 @@
+import { PrismaClient } from '@prisma/client';
+import { useSession } from 'h3';
+
+const prisma = new PrismaClient();
+
+export default defineEventHandler(async (event) => {
+  // 1. Get the session
+  const session = await useSession(event, {
+    password: process.env.SESSION_PASSWORD || 'your-super-secret-32-character-password',
+  });
+
+  // 2. Check if user is in session
+  if (!session.data?.user?.id) {
+    throw createError({
+      statusCode: 401,
+      statusMessage: 'Unauthorized',
+    });
+  }
+
+  // 3. Fetch the full user from the database
+  const user = await prisma.user.findUnique({
+    where: { id: session.data.user.id },
+  });
+
+  if (!user) {
+    // This case might happen if the user was deleted but the session still exists.
+    // Clear the invalid session.
+    await session.clear();
+    throw createError({
+      statusCode: 401,
+      statusMessage: 'Unauthorized',
+    });
+  }
+
+  // 4. Return user data
+  const { password: _password, ...userWithoutPassword } = user;
+  return { user: userWithoutPassword };
+});
diff --git a/server/api/auth/register.post.ts b/server/api/auth/register.post.ts
new file mode 100644
index 0000000..525da4d
--- /dev/null
+++ b/server/api/auth/register.post.ts
@@ -0,0 +1,50 @@
+import { PrismaClient } from '@prisma/client';
+import { hashPassword } from '../utils/password';
+
+const prisma = new PrismaClient();
+
+export default defineEventHandler(async (event) => {
+  const body = await readBody(event);
+  const { email, password, nickname } = body;
+
+  // 1. Validate input
+  if (!email || !password) {
+    throw createError({
+      statusCode: 400,
+      statusMessage: 'Email and password are required',
+    });
+  }
+  if (password.length < 8) {
+    throw createError({
+        statusCode: 400,
+        statusMessage: 'Password must be at least 8 characters long',
+    });
+  }
+
+
+  // 2. Check if user already exists
+  const existingUser = await prisma.user.findUnique({
+    where: { email },
+  });
+
+  if (existingUser) {
+    throw createError({
+      statusCode: 409, // Conflict
+      statusMessage: 'Email already in use',
+    });
+  }
+
+  // 3. Hash password and create user
+  const hashedPassword = await hashPassword(password);
+  const user = await prisma.user.create({
+    data: {
+      email,
+      password: hashedPassword,
+      nickname: nickname || 'New Smurf',
+    },
+  });
+
+  // 4. Return the new user, excluding the password
+  const { password: _password, ...userWithoutPassword } = user;
+  return { user: userWithoutPassword };
+});
diff --git a/server/utils/password.ts b/server/utils/password.ts
new file mode 100644
index 0000000..585ea1e
--- /dev/null
+++ b/server/utils/password.ts
@@ -0,0 +1,13 @@
+// WARNING: This is a placeholder for demonstration purposes only.
+// It is NOT secure and should be replaced with a proper password hashing
+// library like bcrypt or argon2 before any real-world use.
+
+export const hashPassword = async (password: string): Promise<string> => {
+  // In a real implementation, you would use a salt and a strong hashing algorithm.
+  return `${password}-hashed`;
+};
+
+export const verifyPassword = async (password: string, hash: string): Promise<boolean> => {
+  // In a real implementation, the hashing library would handle this comparison securely.
+  return `${password}-hashed` === hash;
+};