diff --git a/accounts/adapters.py b/accounts/adapters.py
new file mode 100644
index 0000000..6f3948a
--- /dev/null
+++ b/accounts/adapters.py
@@ -0,0 +1,18 @@
+# accounts/adapters.py
+from allauth.account.utils import user_username
+from allauth.core.exceptions import ImmediateHttpResponse
+from allauth.socialaccount.adapter import DefaultSocialAccountAdapter
+from allauth.socialaccount.providers.base import AuthError
+from django.http import HttpResponseRedirect
+
+
+class KakaoSocialAccountAdapter(DefaultSocialAccountAdapter):
+    def populate_user(self, request, sociallogin, data):
+        user = super().populate_user(request, sociallogin, data)
+        # allauth 기본값은 카카오 닉네임 기반 username이라 자체 계정과 네임스페이스가 뒤섞인다.
+        user_username(user, f"kakao_{sociallogin.account.uid}")
+        return user
+
+    def on_authentication_error(self, request, provider, error=None, exception=None, extra_context=None):
+        code = "KAKAO_AUTH_DENIED" if error == AuthError.CANCELLED else "SOCIAL_AUTH_FAILED"
+        raise ImmediateHttpResponse(HttpResponseRedirect(f"/login?error={code}"))
diff --git a/config/settings.py b/config/settings.py
index a59b54c..bbda12e 100644
--- a/config/settings.py
+++ b/config/settings.py
@@ -9,12 +9,14 @@
 For the full list of settings and their values, see
 https://docs.djangoproject.com/en/6.0/ref/settings/
 """
-
+import os
 from pathlib import Path
+from dotenv import load_dotenv
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
 BASE_DIR = Path(__file__).resolve().parent.parent
 
+load_dotenv(BASE_DIR / ".env")
 
 # Quick-start development settings - unsuitable for production
 # See https://docs.djangoproject.com/en/6.0/howto/deployment/checklist/
@@ -40,6 +42,19 @@
 
     'rest_framework',
     'accounts',
+    
+    'allauth',
+    'allauth.account',
+    'allauth.socialaccount',
+    'allauth.socialaccount.providers.kakao',
+]
+
+SITE_ID=1
+
+#kakao
+AUTHENTICATION_BACKENDS= [
+    "django.contrib.auth.backends.ModelBackend",
+    "allauth.account.auth_backends.AuthenticationBackend",
 ]
 
 REST_FRAMEWORK = {
@@ -57,8 +72,17 @@
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
+    
+    #kakao
+    'allauth.account.middleware.AccountMiddleware',
 ]
-
+#소셜로그인 동작설정
+SOCIALACCOUNT_LOGIN_ON_GET = False # 폼 + CSRF방어
+SOCIALACCOUNT_EMAIL_REQUIRED = False # 카카오가 이메일 안줘도 가입가능
+SOCIALACCOUNT_EMAIL_VERIFICATION = 'none' # 소셜가입시 이메일 인증절차 생략
+SOCIALACCOUNT_EMAIL_AUTHENTICATION = False # 자동연결차단
+LOGIN_REDIRECT_URL = "/" # 로그인 후 리다이렉트 주소
+SOCIALACCOUNT_ADAPTER = "accounts.adapters.KakaoSocialAccountAdapter"
 ROOT_URLCONF = 'config.urls'
 
 TEMPLATES = [
@@ -120,6 +144,15 @@
 
 USE_TZ = True
 
+SOCIALACCOUNT_PROVIDERS = {
+    "kakao": {
+        "APP": {
+            "client_id": os.environ.get("KAKAO_REST_API_KEY"), # .env에서 읽어온 REST API 키
+            "secret": os.environ.get("KAKAO_CLIENT_SECRET"),   # .env에서 읽어온 Client Secret
+            "key": "",
+        }
+    }
+}
 
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/6.0/howto/static-files/
diff --git a/config/urls.py b/config/urls.py
index 50375ae..c367673 100644
--- a/config/urls.py
+++ b/config/urls.py
@@ -15,9 +15,24 @@
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
 from django.contrib import admin
+from django.http import JsonResponse
 from django.urls import path, include
 
+
+def home(request):
+    # TODO: 프론트엔드 구현 후 SPA index 서빙으로 교체
+    return JsonResponse({"is_authenticated": request.user.is_authenticated})
+
+
+def login_placeholder(request):
+    # TODO: 프론트엔드 구현 후 로그인 페이지로 교체
+    return JsonResponse({"error": request.GET.get("error")})
+
+
 urlpatterns = [
     path('admin/', admin.site.urls),
+    path('', home, name='home'),
+    path('login', login_placeholder, name='login-placeholder'),
     path('auth/', include('accounts.urls')),
+    path('auth/social/', include('allauth.urls')),
 ]
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index d32c7a0..5b257a7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,6 @@ asgiref==3.12.1
 Django==6.0.8
 djangorestframework==3.17.2
 sqlparse==0.5.5
+django-allauth==65.18.0
+python-dotenv==1.2.2
+requests==2.34.2
\ No newline at end of file