diff --git a/tree/tree.xcodeproj/project.pbxproj b/tree/tree.xcodeproj/project.pbxproj
index 528e713..b6b7913 100644
--- a/tree/tree.xcodeproj/project.pbxproj
+++ b/tree/tree.xcodeproj/project.pbxproj
@@ -28,6 +28,7 @@
 		BC2656C321FD94EE00003413 /* NetworkResult.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC2656BB21FD94EE00003413 /* NetworkResult.swift */; };
 		BC2656C421FD94EE00003413 /* NetworkError.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC2656BC21FD94EE00003413 /* NetworkError.swift */; };
 		BC2656C721FD950900003413 /* Articles.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC2656C621FD950900003413 /* Articles.swift */; };
+		BC2656CB21FE97E700003413 /* Config.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC2656CA21FE97E700003413 /* Config.swift */; };
 		D9C6AB3D21FA9B3E001C0AB8 /* Extension+UIColor.swift in Sources */ = {isa = PBXBuildFile; fileRef = D9C6AB3721FA9B3E001C0AB8 /* Extension+UIColor.swift */; };
 		D9C6AB4421FA9CF8001C0AB8 /* Search.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = D9C6AB4321FA9CF8001C0AB8 /* Search.storyboard */; };
 		D9C6AB4D21FAAD0A001C0AB8 /* SearchViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D9C6AB4A21FAAD09001C0AB8 /* SearchViewController.swift */; };
@@ -60,6 +61,7 @@
 		BC2656BB21FD94EE00003413 /* NetworkResult.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NetworkResult.swift; sourceTree = "<group>"; };
 		BC2656BC21FD94EE00003413 /* NetworkError.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NetworkError.swift; sourceTree = "<group>"; };
 		BC2656C621FD950900003413 /* Articles.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Articles.swift; sourceTree = "<group>"; };
+		BC2656CA21FE97E700003413 /* Config.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; name = Config.swift; path = ../../../../Documents/Config.swift; sourceTree = "<group>"; };
 		BF0163F8362378789ACC30D4 /* Pods_tree.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_tree.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		D9C6AB3721FA9B3E001C0AB8 /* Extension+UIColor.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "Extension+UIColor.swift"; sourceTree = "<group>"; };
 		D9C6AB4321FA9CF8001C0AB8 /* Search.storyboard */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.storyboard; path = Search.storyboard; sourceTree = "<group>"; };
@@ -110,6 +112,7 @@
 		35DC0DCD21F6F3C700F30416 /* tree */ = {
 			isa = PBXGroup;
 			children = (
+				BC2656C921FE97D200003413 /* Config */,
 				BC2656C521FD950900003413 /* Model */,
 				D9C6AB3F21FA9CB4001C0AB8 /* View */,
 				D9C6AB4821FAAD09001C0AB8 /* Controller */,
@@ -181,6 +184,14 @@
 			path = Model;
 			sourceTree = "<group>";
 		};
+		BC2656C921FE97D200003413 /* Config */ = {
+			isa = PBXGroup;
+			children = (
+				BC2656CA21FE97E700003413 /* Config.swift */,
+			);
+			path = Config;
+			sourceTree = "<group>";
+		};
 		D9C6AB3621FA9B3E001C0AB8 /* Extension */ = {
 			isa = PBXGroup;
 			children = (
@@ -367,6 +378,7 @@
 				BC2656BF21FD94EE00003413 /* APIManager.swift in Sources */,
 				35CB482021FB6306000D96CF /* ArticleFeedTableViewCell.swift in Sources */,
 				D9C6AB4D21FAAD0A001C0AB8 /* SearchViewController.swift in Sources */,
+				BC2656CB21FE97E700003413 /* Config.swift in Sources */,
 				BC2656C721FD950900003413 /* Articles.swift in Sources */,
 				D9C6AB5D21FC152D001C0AB8 /* SearchScrollEnum.swift in Sources */,
 				D9C6AB3D21FA9B3E001C0AB8 /* Extension+UIColor.swift in Sources */,
diff --git a/tree/tree/Model/Articles.swift b/tree/tree/Model/Articles.swift
index 2c61cd8..819cd70 100644
--- a/tree/tree/Model/Articles.swift
+++ b/tree/tree/Model/Articles.swift
@@ -13,6 +13,9 @@ struct Articles: Codable {
 }
 
 struct Results: Codable {
+    let page: Int // Current page number
+    let totalResults: Int // Total articles count
+    let pages: Int // Total pages count
     let results: [Article]
 }
 
diff --git a/tree/tree/Network Layer/API/EventRegistryAPI.swift b/tree/tree/Network Layer/API/EventRegistryAPI.swift
index 1fe63ac..65b16f9 100644
--- a/tree/tree/Network Layer/API/EventRegistryAPI.swift	
+++ b/tree/tree/Network Layer/API/EventRegistryAPI.swift	
@@ -8,6 +8,26 @@
 
 import Foundation
 
+private enum DefaultParameter {
+    case articleBodyLen
+    case includeArticleImage
+    case articlesCount
+    case resultType
+    case action
+}
+
+extension DefaultParameter {
+    var value: Any {
+        switch self {
+        case .articleBodyLen: return -1
+        case .includeArticleImage: return true
+        case .articlesCount: return 20
+        case .resultType: return "articles"
+        case .action: return "getArticles"
+        }
+    }
+}
+
 enum EventRegistryAPI {
     case getArticles(
         keyword: String,
@@ -45,19 +65,20 @@ extension EventRegistryAPI: APIService {
             let keywordLoc,
             let lang,
             let articlesSortBy,
-            let articlesPage):
+            let articlesPage
+            ):
             return [
                 "keyword": keyword,
                 "keywordLoc": keywordLoc,
                 "lang": lang,
                 "articlesSortBy": articlesSortBy,
                 "articlesPage": articlesPage,
-                "action": "getArticles",
-                "resultType": "articles",
-                "articlesCount": 20,
-                "includeArticleImage": true,
-                "articleBodyLen": -1,
-                "apiKey": "553fab57-e89f-4a1c-8941-3dcb37cf7e30"
+                "action": DefaultParameter.action.value,
+                "resultType": DefaultParameter.resultType.value,
+                "articlesCount": DefaultParameter.articlesCount.value,
+                "includeArticleImage": DefaultParameter.includeArticleImage.value,
+                "articleBodyLen": DefaultParameter.articleBodyLen.value,
+                "apiKey": APIConstant.eventRegistryKey
             ]
         }
     }
diff --git a/tree/tree/Network Layer/NetworkHelper/NetworkResponse.swift b/tree/tree/Network Layer/NetworkHelper/NetworkResponse.swift
index f057941..27bb948 100644
--- a/tree/tree/Network Layer/NetworkHelper/NetworkResponse.swift	
+++ b/tree/tree/Network Layer/NetworkHelper/NetworkResponse.swift	
@@ -18,7 +18,7 @@ enum ResponseTypes {
 struct NetworkResponse {
     func result(_ response: HTTPURLResponse) -> ResponseTypes {
         switch response.statusCode {
-        case 200: return .success
+        case 200..<300: return .success
         case 400..<500: return .clientError
         case 500..<600: return .serverError
         default: return .failure