diff --git a/cakk-api/build.gradle b/cakk-api/build.gradle
index ab8bfb49..3fe68ea5 100644
--- a/cakk-api/build.gradle
+++ b/cakk-api/build.gradle
@@ -1,8 +1,8 @@
 description = "api module"
 
 dependencies {
-    implementation(project(':cakk-common'))
-    implementation(project(':cakk-domain'))
+	implementation project(':cakk-common')
+    implementation project(':cakk-domain')
 
 	// basic
     implementation('org.springframework.boot:spring-boot-starter-web')
diff --git a/cakk-client/build.gradle b/cakk-client/build.gradle
new file mode 100644
index 00000000..6b1098b8
--- /dev/null
+++ b/cakk-client/build.gradle
@@ -0,0 +1,16 @@
+description = 'client module'
+
+dependencies {
+	implementation project(':cakk-common')
+
+	implementation('org.springframework.boot:spring-boot-starter-web')
+	implementation('com.google.api-client:google-api-client-jackson2:2.2.0')
+	implementation('com.google.api-client:google-api-client:2.2.0')
+}
+
+bootJar {
+	enabled = false
+}
+jar {
+	enabled = true
+}
diff --git a/cakk-client/src/main/java/com/cakk/client/config/RestClientConfig.java b/cakk-client/src/main/java/com/cakk/client/config/RestClientConfig.java
new file mode 100644
index 00000000..88f397b4
--- /dev/null
+++ b/cakk-client/src/main/java/com/cakk/client/config/RestClientConfig.java
@@ -0,0 +1,23 @@
+package com.cakk.client.config;
+
+import java.time.Duration;
+
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestClient;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+public class RestClientConfig {
+
+	@Bean
+	public RestClient restClient() {
+		RestTemplate restTemplate = new RestTemplateBuilder()
+			.setConnectTimeout(Duration.ofSeconds(10))
+			.setReadTimeout(Duration.ofSeconds(5))
+			.build();
+
+		return RestClient.create(restTemplate);
+	}
+}
diff --git a/cakk-client/src/main/java/com/cakk/client/vo/OidcPublicKey.java b/cakk-client/src/main/java/com/cakk/client/vo/OidcPublicKey.java
new file mode 100644
index 00000000..982af548
--- /dev/null
+++ b/cakk-client/src/main/java/com/cakk/client/vo/OidcPublicKey.java
@@ -0,0 +1,11 @@
+package com.cakk.client.vo;
+
+public record OidcPublicKey(
+	String kid,
+	String kty,
+	String alg,
+	String use,
+	String n,
+	String e
+) {
+}
diff --git a/cakk-client/src/main/java/com/cakk/client/vo/OidcPublicKeyList.java b/cakk-client/src/main/java/com/cakk/client/vo/OidcPublicKeyList.java
new file mode 100644
index 00000000..cc2fd7b3
--- /dev/null
+++ b/cakk-client/src/main/java/com/cakk/client/vo/OidcPublicKeyList.java
@@ -0,0 +1,19 @@
+package com.cakk.client.vo;
+
+import static com.cakk.common.enums.ReturnCode.*;
+
+import java.util.List;
+
+import com.cakk.common.exception.CakkException;
+
+public record OidcPublicKeyList(
+	List<OidcPublicKey> keys
+) {
+
+	public OidcPublicKey getMatchedKey(String kid, String alg) {
+		return keys.stream()
+			.filter(key -> key.kid().equals(kid) && key.alg().equals(alg))
+			.findAny()
+			.orElseThrow(() -> new CakkException(EXTERNAL_SERVER_ERROR));
+	}
+}
diff --git a/cakk-client/src/main/java/com/cakk/client/web/AppleAuthClient.java b/cakk-client/src/main/java/com/cakk/client/web/AppleAuthClient.java
new file mode 100644
index 00000000..d1c0f17b
--- /dev/null
+++ b/cakk-client/src/main/java/com/cakk/client/web/AppleAuthClient.java
@@ -0,0 +1,26 @@
+package com.cakk.client.web;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+import org.springframework.web.client.RestClient;
+
+import lombok.RequiredArgsConstructor;
+
+import com.cakk.client.vo.OidcPublicKeyList;
+
+@Component
+@RequiredArgsConstructor
+public class AppleAuthClient {
+
+	private final RestClient restClient;
+
+	@Value("${oauth.apple.public-key-url}")
+	private final String publicKeyUrl;
+
+	public OidcPublicKeyList getPublicKeys() {
+		return restClient.get()
+			.uri(publicKeyUrl)
+			.retrieve()
+			.body(OidcPublicKeyList.class);
+	}
+}
diff --git a/cakk-client/src/main/java/com/cakk/client/web/GoogleAuthConfiguration.java b/cakk-client/src/main/java/com/cakk/client/web/GoogleAuthConfiguration.java
new file mode 100644
index 00000000..71494ad1
--- /dev/null
+++ b/cakk-client/src/main/java/com/cakk/client/web/GoogleAuthConfiguration.java
@@ -0,0 +1,29 @@
+package com.cakk.client.web;
+
+import java.util.Collections;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import com.google.api.client.googleapis.auth.oauth2.GoogleIdTokenVerifier;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.gson.GsonFactory;
+
+import lombok.RequiredArgsConstructor;
+
+@Configuration
+@RequiredArgsConstructor
+public class GoogleAuthConfiguration {
+
+	@Value("${oauth.google.client-id}")
+	private String googleClientId;
+
+	@Bean
+	public GoogleIdTokenVerifier googleIdTokenVerifier() {
+		return new GoogleIdTokenVerifier
+			.Builder(new NetHttpTransport(), new GsonFactory())
+			.setAudience(Collections.singletonList(googleClientId))
+			.build();
+	}
+}
diff --git a/cakk-client/src/main/java/com/cakk/client/web/KakaoAuthClient.java b/cakk-client/src/main/java/com/cakk/client/web/KakaoAuthClient.java
new file mode 100644
index 00000000..3ae11372
--- /dev/null
+++ b/cakk-client/src/main/java/com/cakk/client/web/KakaoAuthClient.java
@@ -0,0 +1,26 @@
+package com.cakk.client.web;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+import org.springframework.web.client.RestClient;
+
+import lombok.RequiredArgsConstructor;
+
+import com.cakk.client.vo.OidcPublicKeyList;
+
+@Component
+@RequiredArgsConstructor
+public class KakaoAuthClient {
+
+	private final RestClient restClient;
+
+	@Value("${oauth.kakao.public-key-url}")
+	private final String publicKeyUrl;
+
+	public OidcPublicKeyList getPublicKeys() {
+		return restClient.get()
+			.uri(publicKeyUrl)
+			.retrieve()
+			.body(OidcPublicKeyList.class);
+	}
+}
diff --git a/cakk-client/src/main/resources/client-local.yml b/cakk-client/src/main/resources/client-local.yml
new file mode 100644
index 00000000..9bb8694a
--- /dev/null
+++ b/cakk-client/src/main/resources/client-local.yml
@@ -0,0 +1,7 @@
+oauth:
+  kakao:
+    public-key-info: https://kauth.kakao.com/.well-known/jwks.json
+  apple:
+    public-key-url: https://appleid.apple.com/auth/keys
+  google:
+      client-id: ${GOOGLE_CLIENT_ID}
diff --git a/cakk-common/src/main/java/com/cakk/common/enums/ReturnCode.java b/cakk-common/src/main/java/com/cakk/common/enums/ReturnCode.java
index 42963837..989ef3bd 100644
--- a/cakk-common/src/main/java/com/cakk/common/enums/ReturnCode.java
+++ b/cakk-common/src/main/java/com/cakk/common/enums/ReturnCode.java
@@ -7,7 +7,11 @@
 @RequiredArgsConstructor
 public enum ReturnCode {
 
-	SUCCESS("1000", "요청에 성공하셨습니다.");
+	SUCCESS("1000", "요청에 성공하셨습니다."),
+
+	// 서버 에러 (9998, 9999)
+	INTERNAL_SERVER_ERROR("9998", "내부 서버 에러 입니다."),
+	EXTERNAL_SERVER_ERROR("9999", "외부 서버 에러 입니다.");
 
 	private final String code;
 	private final String message;
diff --git a/cakk-domain/build.gradle b/cakk-domain/build.gradle
index e8cd537a..d5320fe4 100644
--- a/cakk-domain/build.gradle
+++ b/cakk-domain/build.gradle
@@ -1,7 +1,7 @@
 description = "domain module"
 
 dependencies {
-    implementation(project(':cakk-common'))
+	implementation project(':cakk-common')
 
     // jpa
     implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
diff --git a/cakk-domain/src/main/java/com/cakk/domain/entity/user/User.java b/cakk-domain/src/main/java/com/cakk/domain/entity/user/User.java
index 8f8bba91..560c5060 100644
--- a/cakk-domain/src/main/java/com/cakk/domain/entity/user/User.java
+++ b/cakk-domain/src/main/java/com/cakk/domain/entity/user/User.java
@@ -45,7 +45,10 @@ public class User extends AuditEntity {
 	@Column(name = "nickname", length = 20, nullable = false)
 	private String nickname;
 
-	@Column(name = "email", length = 20, nullable = false)
+	@Column(name = "profile_image_url", length = 200)
+	private String profileImageUrl;
+
+	@Column(name = "email", length = 50, nullable = false)
 	private String email;
 
 	@Enumerated(value = EnumType.STRING)
@@ -68,6 +71,7 @@ public User(
 		Provider provider,
 		String providerId,
 		String nickname,
+		String profileImageUrl,
 		String email,
 		Gender gender,
 		LocalDate birthday,
@@ -76,6 +80,7 @@ public User(
 		this.provider = provider;
 		this.providerId = providerId;
 		this.nickname = nickname;
+		this.profileImageUrl = profileImageUrl;
 		this.email = email;
 		this.gender = gender;
 		this.birthday = birthday;
diff --git a/settings.gradle b/settings.gradle
index 91302cbc..8f49223a 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1,7 +1,8 @@
 rootProject.name = 'cakk'
 
 include(
-        'cakk-api',
-        'cakk-domain',
-        'cakk-common'
+	'cakk-api',
+	'cakk-client',
+	'cakk-domain',
+	'cakk-common'
 )