diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index a2cf405..639c779 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -9,8 +9,8 @@
         <option name="gradleJvm" value="#GRADLE_LOCAL_JAVA_HOME" />
         <option name="modules">
           <set>
-            <option value="$PROJECT_DIR$/../../5주차/KUIT6_Android_API" />
-            <option value="$PROJECT_DIR$/../../5주차/KUIT6_Android_API/app" />
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
           </set>
         </option>
       </GradleProjectSettings>
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 0c6dbbc..a01f761 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -1,3 +1,6 @@
+//import org.jetbrains.kotlin.konan.properties.Properties
+import java.util.Properties
+
 plugins {
     alias(libs.plugins.android.application)
     alias(libs.plugins.kotlin.android)
@@ -18,6 +21,15 @@ android {
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
 
+
+// defaultConfig 블록 안에 추가
+        val properties = Properties()
+        val localPropertiesFile = rootProject.file("local.properties")
+        if (localPropertiesFile.exists()) {
+            properties.load(localPropertiesFile.inputStream())
+        }
+        val baseUrl = properties.getProperty("BASE_URL") ?: "http://10.0.2.2:8080/"
+        buildConfigField("String", "BASE_URL", "\"$baseUrl\"")
     }
 
     buildTypes {
@@ -38,6 +50,7 @@ android {
     }
     buildFeatures {
         compose = true
+        buildConfig = true
     }
 }
 
@@ -74,4 +87,11 @@ dependencies {
     androidTestImplementation(libs.androidx.espresso.core)
     debugImplementation(libs.androidx.compose.ui.tooling)
     debugImplementation(libs.androidx.compose.ui.test.manifest)
+
+    //Retrofit & Okhttp
+    implementation(libs.retrofit)
+    implementation(libs.retrofit.converter.gson)
+    implementation(libs.okhttp)
+    implementation(libs.okhttp.logging.interceptor)
+
 }
diff --git a/app/src/main/java/com/example/kuit6_android_api/data/api/ApiService.kt b/app/src/main/java/com/example/kuit6_android_api/data/api/ApiService.kt
new file mode 100644
index 0000000..ad8c8bf
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/data/api/ApiService.kt
@@ -0,0 +1,20 @@
+package com.example.kuit6_android_api.data.api
+
+import com.example.kuit6_android_api.data.model.response.BaseResponse
+import com.example.kuit6_android_api.data.model.response.PostResponse
+import retrofit2.http.GET
+import retrofit2.http.POST
+import retrofit2.http.Body
+import retrofit2.http.Query
+
+
+interface ApiService {
+    @GET(value = "/api/posts")
+    suspend fun getPosts(): BaseResponse<List<PostResponse>>
+
+    @POST("/api/posts")
+    suspend fun createPost(
+        @Query("author") author: String = "규빈",
+        @Body request: PostCreateRequest
+    ): BaseResponse<PostResponse>
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/data/model/request/PostCreateRequest.kt b/app/src/main/java/com/example/kuit6_android_api/data/model/request/PostCreateRequest.kt
new file mode 100644
index 0000000..ce49d8f
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/data/model/request/PostCreateRequest.kt
@@ -0,0 +1,9 @@
+package com.example.kuit6_android_api.data.model.request
+
+import kotlinx.serialization.SerialName
+
+data class PostCreateRequest(
+    @SerialName( value = "title" ) val title: String,
+    @SerialName( value = "content" ) val content: String,
+    @SerialName(value = "imageUrl" ) val imageUrl: String?
+)
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/data/model/response/AuthorResponse.kt b/app/src/main/java/com/example/kuit6_android_api/data/model/response/AuthorResponse.kt
new file mode 100644
index 0000000..9755f13
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/data/model/response/AuthorResponse.kt
@@ -0,0 +1,9 @@
+package com.example.kuit6_android_api.data.model.response
+
+import kotlinx.serialization.SerialName
+
+data class AuthorResponse(
+    @SerialName(value = "id") val id: Long,
+    @SerialName(value = "username") val username: String,
+    @SerialName(value = "profileImageUrl") val profileImageUrl: String?
+)
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/data/model/response/BaseResponse.kt b/app/src/main/java/com/example/kuit6_android_api/data/model/response/BaseResponse.kt
new file mode 100644
index 0000000..d883a42
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/data/model/response/BaseResponse.kt
@@ -0,0 +1,10 @@
+package com.example.kuit6_android_api.data.model.response
+
+import kotlinx.serialization.SerialName
+
+data class BaseResponse<T>(
+    @SerialName(value = "success")  val success: Boolean,
+    @SerialName(value = "message")  val message: String?,
+    @SerialName(value = "data")  val data: T?,//데이터가 안 올 수도 ?
+    @SerialName(value = "timestamp")  val timestamp: String
+)
\ No newline at end of file
diff --git a/app/src/main/java/com/example/kuit6_android_api/data/model/response/PostResponse.kt b/app/src/main/java/com/example/kuit6_android_api/data/model/response/PostResponse.kt
new file mode 100644
index 0000000..dac12e3
--- /dev/null
+++ b/app/src/main/java/com/example/kuit6_android_api/data/model/response/PostResponse.kt
@@ -0,0 +1,13 @@
+package com.example.kuit6_android_api.data.model.response
+
+import kotlinx.serialization.SerialName
+
+data class PostResponse(
+    @SerialName(value = "id")  val id: Long,
+    @SerialName(value = "title") val title: String,
+    @SerialName(value = "content") val content: String,
+    @SerialName(value = "imageUrl") val imageUrl: String?,
+    @SerialName(value = "author") val author: AuthorResponse,
+    @SerialName(value = "createdAt") val createdAt: String,
+    @SerialName(value = "updatedAt") val updatedAt: String
+)
\ No newline at end of file