diff --git a/src/main/java/moodbuddy/moodbuddy/domain/diary/controller/emotion/DiaryEmotionApiController.java b/src/main/java/moodbuddy/moodbuddy/domain/diary/controller/emotion/DiaryEmotionApiController.java
index 9511c472..66eff3bc 100644
--- a/src/main/java/moodbuddy/moodbuddy/domain/diary/controller/emotion/DiaryEmotionApiController.java
+++ b/src/main/java/moodbuddy/moodbuddy/domain/diary/controller/emotion/DiaryEmotionApiController.java
@@ -13,7 +13,7 @@
 import org.springframework.web.bind.annotation.RestController;
 
 @RestController
-@RequestMapping("/api/v1/member/diary")
+@RequestMapping("/api/v2/member/diary")
 @Tag(name = "Diary", description = "일기 감정 관련 API")
 @RequiredArgsConstructor
 public class DiaryEmotionApiController {
diff --git a/src/main/java/moodbuddy/moodbuddy/domain/letter/controller/LetterApiController.java b/src/main/java/moodbuddy/moodbuddy/domain/letter/controller/LetterApiController.java
index e9b76c3a..5796aef4 100644
--- a/src/main/java/moodbuddy/moodbuddy/domain/letter/controller/LetterApiController.java
+++ b/src/main/java/moodbuddy/moodbuddy/domain/letter/controller/LetterApiController.java
@@ -21,7 +21,7 @@
 
 @RestController
 @RequiredArgsConstructor
-@RequestMapping("/api/v1/member/letter")
+@RequestMapping("/api/v2/member/letter")
 @Tag(name = "letter-controller", description = "Letter API")
 public class LetterApiController {
 
diff --git a/src/main/java/moodbuddy/moodbuddy/domain/user/controller/OAuthController.java b/src/main/java/moodbuddy/moodbuddy/domain/user/controller/OAuthController.java
index 0ae385e4..2d09a645 100644
--- a/src/main/java/moodbuddy/moodbuddy/domain/user/controller/OAuthController.java
+++ b/src/main/java/moodbuddy/moodbuddy/domain/user/controller/OAuthController.java
@@ -15,7 +15,7 @@
 @Slf4j
 @RestController
 @RequiredArgsConstructor
-@RequestMapping("api/v1/user")
+@RequestMapping("api/v2/user")
 public class OAuthController {
 
     private final KakaoService kakaoService;
diff --git a/src/main/java/moodbuddy/moodbuddy/domain/user/dto/request/UserReqLoginDTO.java b/src/main/java/moodbuddy/moodbuddy/domain/user/dto/request/UserReqLoginDTO.java
index 1454f7a9..188fe738 100644
--- a/src/main/java/moodbuddy/moodbuddy/domain/user/dto/request/UserReqLoginDTO.java
+++ b/src/main/java/moodbuddy/moodbuddy/domain/user/dto/request/UserReqLoginDTO.java
@@ -10,5 +10,5 @@
 @NoArgsConstructor
 public class UserReqLoginDTO {
     @Schema(description = "임시로 사용할 자체 로그인이기 때문에 kakaoId 으로만 로그인이 가능하게 한다.", example = "12342")
-    private Long userId;
+    private Long kakaoId;
 }
diff --git a/src/main/java/moodbuddy/moodbuddy/domain/user/repository/UserRepository.java b/src/main/java/moodbuddy/moodbuddy/domain/user/repository/UserRepository.java
index a967e366..ebdc9433 100644
--- a/src/main/java/moodbuddy/moodbuddy/domain/user/repository/UserRepository.java
+++ b/src/main/java/moodbuddy/moodbuddy/domain/user/repository/UserRepository.java
@@ -24,6 +24,8 @@ public interface UserRepository extends JpaRepository<User, Long> {
     @Query("select u from User u where u.userId = :userId")
     Optional<User> findByUserIdWithPessimisticLock(@Param("userId") Long userId);
 
+    @Query("select u from User u where u.kakaoId = :kakaoId")
+    Optional<User> findByKakaoId(@Param("kakaoId") Long kakaoId);
 //    @Modifying
 //    @Transactional
 //    @Query("update User u set u.userCurDiaryNums = :curDiaryNums where u.userId = :userId")
@@ -32,11 +34,11 @@ public interface UserRepository extends JpaRepository<User, Long> {
 //    @Modifying
 //    @Transactional
 //    @Query("update User u set u.userLastDiaryNums = :curDiaryNums where u.userId = :userId")
+
 //    void updateLastDiaryNumsById(@Param("userId") Long userId, @Param("curDiaryNums") Integer curDiaryNums);
 
     @Modifying
     @Transactional
     @Query("update User u set u.letterAlarm = :letterAlarm where u.userId = :userId")
     void updateLetterAlarmByUserId(@Param("userId") Long userId, @Param("letterAlarm") boolean letterAlarm);
-
 }
diff --git a/src/main/java/moodbuddy/moodbuddy/domain/user/service/UserService.java b/src/main/java/moodbuddy/moodbuddy/domain/user/service/UserService.java
index 44d907ee..2bf7dc31 100644
--- a/src/main/java/moodbuddy/moodbuddy/domain/user/service/UserService.java
+++ b/src/main/java/moodbuddy/moodbuddy/domain/user/service/UserService.java
@@ -61,4 +61,5 @@ public interface UserService {
     UserResLoginDTO login(UserReqLoginDTO userReqLoginDTO);
     UserResSaveDTO save(UserReqSaveDTO userReqSaveDTO);
     User getUserById(Long userId);
+    User getUserByKakaoId(Long kakaoId);
 }
diff --git a/src/main/java/moodbuddy/moodbuddy/domain/user/service/UserServiceImpl.java b/src/main/java/moodbuddy/moodbuddy/domain/user/service/UserServiceImpl.java
index 64ffd960..43892c5f 100644
--- a/src/main/java/moodbuddy/moodbuddy/domain/user/service/UserServiceImpl.java
+++ b/src/main/java/moodbuddy/moodbuddy/domain/user/service/UserServiceImpl.java
@@ -522,7 +522,7 @@ public void setUserCheckTodayDairy(Long userId, Boolean check) {
     /** 테스트를 위한 임시 자체 로그인 **/
     @Override
     public UserResLoginDTO login(UserReqLoginDTO userReqLoginDTO) {
-        return UserMapper.toUserResLoginDTO(getUserById(userReqLoginDTO.getUserId()));
+        return UserMapper.toUserResLoginDTO(getUserByKakaoId(userReqLoginDTO.getKakaoId()));
     }
 
     /** 테스트를 위한 임시 자체 회원가입 **/
@@ -534,7 +534,13 @@ public UserResSaveDTO save(UserReqSaveDTO userReqSaveDTO) {
 
     @Override
     public User getUserById(Long userId) {
-        return userRepository.findById(userId)
+        return userRepository.findByUserId(userId)
+                .orElseThrow(()->new UserNotFoundByUserIdException(ErrorCode.NOT_FOUND_USER));
+    }
+
+    @Override
+    public User getUserByKakaoId(Long kakaoId) {
+        return userRepository.findByKakaoId(kakaoId)
                 .orElseThrow(()->new UserNotFoundByUserIdException(ErrorCode.NOT_FOUND_USER));
     }
 }
\ No newline at end of file
diff --git a/src/main/java/moodbuddy/moodbuddy/global/common/config/SecurityConfig.java b/src/main/java/moodbuddy/moodbuddy/global/common/config/SecurityConfig.java
index eb092167..552c3464 100644
--- a/src/main/java/moodbuddy/moodbuddy/global/common/config/SecurityConfig.java
+++ b/src/main/java/moodbuddy/moodbuddy/global/common/config/SecurityConfig.java
@@ -44,10 +44,14 @@ public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
                                 "http://react-app:3000",
                                 "http://localhost:5173",
                                 "http://localhost:3000",
+                                "http://localhost:8080",
+                                "http://52.79.54.242:8080",
+                                "http://52.79.54.242:3000",
                                 "http://moodbuddy:8080",
                                 "https://moodbuddy.site",
                                 "http://moodbuddy.site",
-                                "https://neon-cat-f70a98.netlify.app"));
+                                "https://neon-cat-f70a98.netlify.app",
+                                "https://main.d28mm6xwy7gaq8.amplifyapp.com/"));
                         config.setAllowedHeaders(List.of("*"));
                         config.setAllowedMethods(List.of("GET", "POST", "PUT", "DELETE"));
                         config.setAllowCredentials(true);