diff --git a/Counters.xcodeproj/project.pbxproj b/Counters.xcodeproj/project.pbxproj
index 4ac3e28..c8d5971 100644
--- a/Counters.xcodeproj/project.pbxproj
+++ b/Counters.xcodeproj/project.pbxproj
@@ -8,6 +8,7 @@
 
 /* Begin PBXBuildFile section */
 		00039F6C268210520061B2A2 /* String+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 00039F6B268210520061B2A2 /* String+Extensions.swift */; };
+		000BB85126B1CA79001B2C7E /* URLResponse+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 000BB85026B1CA79001B2C7E /* URLResponse+Extensions.swift */; };
 		001978632695D13B0092FFF1 /* UserDefaultsProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = 001978622695D13B0092FFF1 /* UserDefaultsProtocol.swift */; };
 		001978692695D1D80092FFF1 /* UserDefaultsMock.swift in Sources */ = {isa = PBXBuildFile; fileRef = 001978682695D1D80092FFF1 /* UserDefaultsMock.swift */; };
 		002ABA3126666F5500F5B3C9 /* CreateCounterViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 002ABA2626666F5500F5B3C9 /* CreateCounterViewModel.swift */; };
@@ -98,6 +99,7 @@
 
 /* Begin PBXFileReference section */
 		00039F6B268210520061B2A2 /* String+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "String+Extensions.swift"; sourceTree = "<group>"; };
+		000BB85026B1CA79001B2C7E /* URLResponse+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "URLResponse+Extensions.swift"; sourceTree = "<group>"; };
 		001978622695D13B0092FFF1 /* UserDefaultsProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UserDefaultsProtocol.swift; sourceTree = "<group>"; };
 		001978682695D1D80092FFF1 /* UserDefaultsMock.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UserDefaultsMock.swift; sourceTree = "<group>"; };
 		002ABA2626666F5500F5B3C9 /* CreateCounterViewModel.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CreateCounterViewModel.swift; sourceTree = "<group>"; };
@@ -496,6 +498,7 @@
 			children = (
 				00A1035C26651BF200E661CD /* URL+Extensions.swift */,
 				00A1035826651BF200E661CD /* URLRequest+Extensions.swift */,
+				000BB85026B1CA79001B2C7E /* URLResponse+Extensions.swift */,
 			);
 			path = Extensions;
 			sourceTree = "<group>";
@@ -830,6 +833,7 @@
 				00A1036226651BF200E661CD /* APIClient.swift in Sources */,
 				007C166C2681046800EB74C5 /* ExampleCollectionViewCell.swift in Sources */,
 				00A103922665204200E661CD /* CustomTextField.swift in Sources */,
+				000BB85126B1CA79001B2C7E /* URLResponse+Extensions.swift in Sources */,
 				00CF700C269CB7D100F5AB5E /* ExamplesCollectionViewDataSource.swift in Sources */,
 				00A103AA266522C800E661CD /* UIImage+Badge.swift in Sources */,
 				002ABA3326666F5500F5B3C9 /* CreateCounterStrings.swift in Sources */,
diff --git a/Counters/Counters/ViewModel/CountersViewModel.swift b/Counters/Counters/ViewModel/CountersViewModel.swift
index fb24298..1a0611c 100644
--- a/Counters/Counters/ViewModel/CountersViewModel.swift
+++ b/Counters/Counters/ViewModel/CountersViewModel.swift
@@ -7,7 +7,7 @@
 
 import Foundation
 
-final class CountersViewModel: ObservableObject {
+final class CountersViewModel {
     private let service: CountersService
     private let userDefaults: UserDefaultsProtocol
 
@@ -15,6 +15,9 @@ final class CountersViewModel: ObservableObject {
     private(set) var filteredCounters: [Counter] = []
     private let firstTimeOpenKey = "FirstOpen"
 
+    private var cache = Cache.shared
+    private var countersCacheKey = "counters"
+
     private(set) var viewState: ViewState = .noContent {
         didSet {
             switch viewState {
@@ -26,9 +29,21 @@ final class CountersViewModel: ObservableObject {
         }
     }
 
-    private var cache = Cache.shared
-    private var countersCacheKey = "counters"
+    // View bindings
+    var didChangeState: ((ViewState, ViewStateError?) -> Void)? = { (_, _) in
+        fatalError("Not implemented")
+    }
 
+    // Init
+    init(service: CountersService = CountersService(),
+         userDefaults: UserDefaultsProtocol = UserDefaults.standard) {
+        self.service = service
+        self.userDefaults = userDefaults
+    }
+}
+
+// MARK: - Computed properties
+extension CountersViewModel {
     var totalCountersText: String {
         guard counters.count > 0 else {
             return ""
@@ -50,16 +65,6 @@ final class CountersViewModel: ObservableObject {
     var isFilteredCountersEmpty: Bool {
         return filteredCounters.count == 0
     }
-
-    // View bindings
-    var didChangeState: ((ViewState, ViewStateError?) -> Void)?
-
-    // Init
-    init(service: CountersService = CountersService(),
-         userDefaults: UserDefaultsProtocol = UserDefaults.standard) {
-        self.service = service
-        self.userDefaults = userDefaults
-    }
 }
 
 // MARK: - Public methods
diff --git a/Counters/Network/APIClient.swift b/Counters/Network/APIClient.swift
index 1ad12ab..6f937a1 100755
--- a/Counters/Network/APIClient.swift
+++ b/Counters/Network/APIClient.swift
@@ -42,7 +42,7 @@ class APIClient {
                 }
 
                 if let response = response as? HTTPURLResponse,
-                   !(200..<300 ~= response.statusCode) {
+                   response.validationStatus != .success {
                     completion(.failure(APIError(response)), response)
                     return
                 }
diff --git a/Counters/Network/Extensions/URLResponse+Extensions.swift b/Counters/Network/Extensions/URLResponse+Extensions.swift
new file mode 100644
index 0000000..a671d0d
--- /dev/null
+++ b/Counters/Network/Extensions/URLResponse+Extensions.swift
@@ -0,0 +1,41 @@
+//
+//  URLResponse+Extensions.swift
+//  Counters
+//
+//  Created by Fabio Cezar Salata on 28/07/21.
+//
+
+import Foundation
+
+enum ValidationStatus {
+    case informational      // 100
+    case success            // 200
+    case redirection        // 300
+    case clientError        // 400
+    case serverError        // 500
+    case unknown
+}
+
+extension URLResponse {
+    var validationStatus: ValidationStatus {
+        if let httpResponse = self as? HTTPURLResponse {
+            let statusCode = httpResponse.statusCode
+            switch statusCode {
+            case 0...199:
+                return .informational
+            case 200...299:
+                return .success
+            case 300...399:
+                return .redirection
+            case 400...499:
+                return .clientError
+            case 500...599:
+                return .serverError
+            default:
+                return .unknown
+            }
+        } else {
+            return .unknown
+        }
+    }
+}