diff --git a/.idea/.idea.pcgs-inv/.idea/avalonia.xml b/.idea/.idea.pcgs-inv/.idea/avalonia.xml
index 091e888..b5b7f8c 100644
--- a/.idea/.idea.pcgs-inv/.idea/avalonia.xml
+++ b/.idea/.idea.pcgs-inv/.idea/avalonia.xml
@@ -4,6 +4,7 @@
     <option name="projectPerEditor">
       <map>
         <entry key="PcgsInvUi/App.axaml" value="PcgsInvUi/PcgsInvUi.csproj" />
+        <entry key="PcgsInvUi/Views/ApiKeyView.axaml" value="PcgsInvUi/PcgsInvUi.csproj" />
         <entry key="PcgsInvUi/Views/CoinListView.axaml" value="PcgsInvUi/PcgsInvUi.csproj" />
         <entry key="PcgsInvUi/Views/DeleteWindow.axaml" value="PcgsInvUi/PcgsInvUi.csproj" />
         <entry key="PcgsInvUi/Views/ErrorWindow.axaml" value="PcgsInvUi/PcgsInvUi.csproj" />
diff --git a/PcgsInvUi/App.axaml.cs b/PcgsInvUi/App.axaml.cs
index a938ffb..c5de0f4 100644
--- a/PcgsInvUi/App.axaml.cs
+++ b/PcgsInvUi/App.axaml.cs
@@ -17,7 +17,7 @@ public partial class App : Application {
         if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop) {
             var coins = new CoinDatabase();
             desktop.MainWindow = new MainWindow {
-                DataContext = new MainWindowViewModel(),
+                DataContext = new MainWindowViewModel(coins, !coins.TryInitApiClient()),
             };
             
             // Allow the application to save the database when it exits.
diff --git a/PcgsInvUi/Services/CoinDatabase.cs b/PcgsInvUi/Services/CoinDatabase.cs
index 52f2dac..c9c82a9 100644
--- a/PcgsInvUi/Services/CoinDatabase.cs
+++ b/PcgsInvUi/Services/CoinDatabase.cs
@@ -10,9 +10,14 @@ public class CoinDatabase {
     public SQLiteConnection Connection { get; set; }
     private Boolean IsConnected { get; set; }
     public ObservableCollection<Coin> Collection { get; set; }
+    public Boolean IsClientConnected { get; set; }
 
-    private PcgsClient _pcgsClient;
-
+    private PcgsClient? _pcgsClient;
+    
+    /// <summary>
+    /// Creates and initilizes a new instance of the CoinDatabase.
+    /// Must call TryInitApiClient() after creating a new instance.
+    /// </summary>
     public CoinDatabase() {
         // Create a connection to SQLite
         Connection = CreateConnection();
@@ -23,33 +28,6 @@ public class CoinDatabase {
         Collection = new ObservableCollection<Coin>();
         GetCollection("CollectionTable");
         Console.WriteLine("Got collection.");
-
-        // Initialize the PCGS client. Must get the API key from the database.
-        // Check the database for an API key.
-        SQLiteCommand cmd = Connection.CreateCommand();
-        cmd.CommandText = "SELECT API_KEY FROM ApiTable";
-        using (var reader = cmd.ExecuteReader()) {
-            // If there's no API key, we need to get one from the user.
-            // Eventually there will be a window that pops up adking for the API key.
-            var apiKey = "";
-            if (reader.Read()) {
-                // Initialize the client.
-                apiKey = reader.GetString(0);
-            }
-            else {
-                // Get the API key from the user.
-                // TODO Create and open a window that asks for the API key.
-                // Since this needs to build before the main window is created, we can't do that yet.
-                Console.WriteLine("No API key found. Using default...");
-                do {
-                    // Console.Write("Enter a valid API key: ");
-                    // apiKey = Console.ReadLine();
-                    // Eventually we actually want to throw an error here.
-                    apiKey = "E8xivTVN_k4Q8ubk8Xv_uU11U91WX0wDht4S4m4BAf2HPmKnGrZ0J2f9nccM7Ns1VkGoT1SXYR74I7aNaMKqXlJGEy3oobseKV0nGiqu1IKvFkOTVjhV37SWUVExSDFMC6FLzs7xJQIHwkcxr5JFOQNmc4ZytEh_-hmCN3NL-z0fEk98tzBmPJ_F7bq_xNru86QMD2A9yalu_dWe-lCysfyE2bCA2EDqwvWenRYf-0XnNtp6qlxxCMlCd-TDqqRKLC3qefCwpXSemwBiNSP5gbC9pwcKrZugkruuJ0nyxxThZymm";
-                } while (apiKey == "" || apiKey == null);
-            }
-            _pcgsClient = new PcgsClient(apiKey);
-        }
     }
 
     ~CoinDatabase() {
@@ -59,6 +37,32 @@ public class CoinDatabase {
         // Close the connection.
         Connection.Close();
     }
+    
+    /// <summary>
+    /// Attempts to intitialize the API client by selecting the API key from the database.
+    /// </summary>
+    /// <returns>True if the API key was found, false otherwise.</returns>
+    public bool TryInitApiClient() {
+        SQLiteCommand cmd = Connection.CreateCommand();
+        cmd.CommandText = "SELECT API_KEY FROM ApiTable";
+
+        using (var reader = cmd.ExecuteReader()) {
+            if (reader.Read()) {
+                var apiKey = reader.GetString(0);
+                _pcgsClient = new PcgsClient(apiKey);
+
+                var insertCmd = Connection.CreateCommand();
+                insertCmd.CommandText = $"INSERT INTO ApiTable (API_KEY, REQUESTS_REMAINING) VALUE ({apiKey}, 1000)";
+                insertCmd.ExecuteNonQuery();
+
+                IsClientConnected = true;
+            }
+            else {
+                IsClientConnected = false;
+            }
+        }
+        return IsClientConnected;
+    }
 
     private SQLiteConnection CreateConnection() {
         // Check if database exists.
diff --git a/PcgsInvUi/ViewModels/ApiKeyViewModel.cs b/PcgsInvUi/ViewModels/ApiKeyViewModel.cs
new file mode 100644
index 0000000..468b2dd
--- /dev/null
+++ b/PcgsInvUi/ViewModels/ApiKeyViewModel.cs
@@ -0,0 +1,30 @@
+using ReactiveUI;
+using System.Reactive;
+
+namespace PcgsInvUi.ViewModels;
+
+public class ApiKeyViewModel : ViewModelBase {
+    public string ApiKeyInput {
+        get => _apiKeyInput;
+        set => this.RaiseAndSetIfChanged(ref _apiKeyInput, value);
+    }
+    private string _apiKeyInput = "";
+
+    public bool OkEnabled {
+        get => _okEnabled;
+        set => this.RaiseAndSetIfChanged(ref _okEnabled, value);
+    }
+    private bool _okEnabled;
+
+    public ReactiveCommand<Unit, string> OkCommand { get; }
+
+    public ApiKeyViewModel() {
+        var okEnabled = this.WhenAnyValue(
+            x => x.ApiKeyInput,
+            x => !string.IsNullOrWhiteSpace(x));
+
+
+        // Get the API key from the user.
+        OkCommand = ReactiveCommand.Create(() => ApiKeyInput, okEnabled);
+    }
+}
diff --git a/PcgsInvUi/ViewModels/MainWindowViewModel.cs b/PcgsInvUi/ViewModels/MainWindowViewModel.cs
index 916e1f0..6eb6124 100644
--- a/PcgsInvUi/ViewModels/MainWindowViewModel.cs
+++ b/PcgsInvUi/ViewModels/MainWindowViewModel.cs
@@ -39,10 +39,24 @@ public class MainWindowViewModel : ViewModelBase {
     public MainWindowViewModel(CoinDatabase coins, bool askForApiKey) {
         ConnectedCoinDatabase = coins;
         var newViewModel = new NewViewModel();
-        _sideContent = newViewModel;
         // DisplayedList = CoinCollection = new ObservableCollection<Coin>(coins.GetItems());
         DisplayedList = ConnectedCoinDatabase.Collection;
         TotalValue = DisplayedList.Sum(x => x.TotalPrice);
+
+        // Setup interaction to show ApiKeyWindow
+        // Check if API key must be entered.
+        if (askForApiKey) {
+            Console.WriteLine("API key must be entered by user.");
+            // Show the API key input view.
+            var apiKeyViewModel = new ApiKeyViewModel();
+            _sideContent = apiKeyViewModel;
+            // Subscribe to the OkCommand in the ApiKeyViewModel.
+            apiKeyViewModel.OkCommand
+                .Subscribe(apiKey => {
+                    // Attempt to connect to the PCGS API and set view accordingly.
+                    if (ConnectedCoinDatabase.TryInitApiClient()) _sideContent = newViewModel;
+                });
+        } else _sideContent = newViewModel;
         
         // Set up the ability to show the error window.
         ShowErrorWindow = new Interaction<ErrorWindowViewModel, bool>();
diff --git a/PcgsInvUi/Views/ApiKeyView.axaml b/PcgsInvUi/Views/ApiKeyView.axaml
new file mode 100644
index 0000000..e125862
--- /dev/null
+++ b/PcgsInvUi/Views/ApiKeyView.axaml
@@ -0,0 +1,14 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:viewModels="clr-namespace:PcgsInvUi.ViewModels"
+        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        x:Class="PcgsInvUi.Views.ApiKeyView" x:DataType="viewModels:ApiKeyViewModel" >
+    <StackPanel>
+        <Label Content="API key was not found or did not authenticate." /> 
+        <Label Content="Please enter your API key below:" />
+        <TextBox Margin="10" Text="{Binding ApiKeyInput}" />
+        <Button HorizontalAlignment="Center" Content="Submit" Command="{Binding OkCommand}" />
+    </StackPanel>
+</UserControl>
diff --git a/PcgsInvUi/Views/ApiKeyView.axaml.cs b/PcgsInvUi/Views/ApiKeyView.axaml.cs
new file mode 100644
index 0000000..74d877c
--- /dev/null
+++ b/PcgsInvUi/Views/ApiKeyView.axaml.cs
@@ -0,0 +1,9 @@
+using Avalonia.Controls;
+
+namespace PcgsInvUi.Views; 
+
+public partial class ApiKeyView : UserControl {
+    public ApiKeyView() {
+        InitializeComponent();
+    }
+}
diff --git a/PcgsInvUi/Views/MainWindow.axaml.cs b/PcgsInvUi/Views/MainWindow.axaml.cs
index 6cd8203..be6ccd3 100644
--- a/PcgsInvUi/Views/MainWindow.axaml.cs
+++ b/PcgsInvUi/Views/MainWindow.axaml.cs
@@ -1,5 +1,4 @@
 using System;
-using System.IO;
 using System.Reactive;
 using System.Threading.Tasks;
 using Avalonia.Platform.Storage;
@@ -36,6 +35,7 @@ public partial class MainWindow : ReactiveWindow<MainWindowViewModel> {
 
     private async Task ShowFilePickerAsync(InteractionContext<Unit, Uri> interationContext) {
         var topLevel = GetTopLevel(this);
+        if (topLevel is null) throw new Exception("Could not find top level of the file path.");
         var file = await topLevel.StorageProvider.SaveFilePickerAsync(new FilePickerSaveOptions {
             Title = "Save CSV...",
             DefaultExtension = ".csv",
diff --git a/PcgsInvUi/Views/NewView.axaml.cs b/PcgsInvUi/Views/NewView.axaml.cs
index 5a4abb6..905418a 100644
--- a/PcgsInvUi/Views/NewView.axaml.cs
+++ b/PcgsInvUi/Views/NewView.axaml.cs
@@ -1,6 +1,4 @@
-using Avalonia;
-using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
+using Avalonia.Controls;
 
 namespace PcgsInvUi.Views;
 
@@ -8,4 +6,4 @@ public partial class NewView : UserControl {
     public NewView() {
         InitializeComponent();
     }
-}
\ No newline at end of file
+}
diff --git a/pcgs-inv.sln.DotSettings.user b/pcgs-inv.sln.DotSettings.user
new file mode 100644
index 0000000..73f7e49
--- /dev/null
+++ b/pcgs-inv.sln.DotSettings.user
@@ -0,0 +1,2 @@
+<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:Boolean x:Key="/Default/AddReferences/RecentPaths/=C_003A_005CProgram_0020Files_005Cdotnet_005Cpacks_005CMicrosoft_002ENETCore_002EApp_002ERef_005C7_002E0_002E13_005Cref_005Cnet7_002E0_005CSystem_002EData_002Edll/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>
\ No newline at end of file