diff --git a/TeamsLocalAPI/Client.cs b/TeamsLocalAPI/Client.cs
new file mode 100644
index 0000000..ba0ec4e
--- /dev/null
+++ b/TeamsLocalAPI/Client.cs
@@ -0,0 +1,445 @@
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Net.WebSockets;
+using System.Text;
+using System.Text.Json;
+using TeamsLocalLibary.EventArgs;
+
+namespace TeamsLocalLibary;
+
+public class Client : INotifyPropertyChanged
+{
+    public bool IsBackgroundBlurred { get => isBackgroundBlurred; set { if (value != IsBackgroundBlurred) _ = SendCommand(value ? MeetingAction.BlurBackground : MeetingAction.UnblurBackground); } }
+    public bool IsHandRaised { get => isHandRaised; set { if (value != IsHandRaised) _ = SendCommand(value ? MeetingAction.RaiseHand : MeetingAction.LowerHand); } }
+    public bool IsMuted { get => isMuted; set { if (value != IsMuted) _ = SendCommand(value ? MeetingAction.Mute : MeetingAction.Unmute); } }
+    public bool IsVideoOn { get => isVideoOn; set { if (value != IsVideoOn) _ = SendCommand(value ? MeetingAction.ShowVideo : MeetingAction.HideVideo); } }
+    public bool IsSharing { get => isSharing; set { if (value != IsSharing) _ = value ? SendCommand(MeetingAction.ToggleUI, ClientMessageParameterType.ToggleUiSharing) : _ = SendCommand(MeetingAction.StopSharing); } }
+
+    public bool IsRecordingOn { get => isRecordingOn; }
+    public bool IsInMeeting { get => isInMeeting; }
+
+    public bool HasUnreadMessages { get => hasUnreadMessages; }
+
+    public bool IsConnected => ws is not null && ws.State == WebSocketState.Open;
+
+    public bool CanToggleBlur { get; private set; }
+    public bool CanToggleHand { get; private set; }
+    public bool CanToggleMute { get; private set; }
+    public bool CanToggleShareTray { get; private set; }
+    public bool CanToggleVideo { get; private set; }
+
+    public bool CanToggleChat { get; private set; }
+    public bool CanStopSharing { get; private set; }
+
+    public bool CanLeave { get; private set; }
+    public bool CanPair { get; private set; }
+    public bool CanReact { get; private set; }
+
+    private bool isMuted;
+    private bool isVideoOn;
+    private bool isHandRaised;
+    private bool isInMeeting;
+    private bool isRecordingOn;
+    private bool isBackgroundBlurred;
+    private bool hasUnreadMessages;
+    private bool isSharing;
+
+    private readonly SemaphoreSlim sendSemaphore       = new(1);
+    private readonly SemaphoreSlim receiveSemaphore    = new(1);
+    private readonly SemaphoreSlim connectingSemaphore = new(1);
+
+    private readonly JsonSerializerOptions jsonSerializerOptions = new()
+    {
+        DefaultIgnoreCondition = System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingNull,
+        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+    };
+
+    private ClientInfo clientInfo;
+
+    private ClientWebSocket? ws;
+
+    public event EventHandler<ConnectionStateChangedEventArgs>? ConnectionState;
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+
+    public event EventHandler<TokenReceivedEventArgs>? TokenReceived;
+    public event EventHandler<SuccessReceivedEventArgs>? SuccessReceived;
+    public event EventHandler<ErrorReceivedEventArgs>? ErrorReceived;
+
+    public Client(bool autoConnect = false, string manufacturer = "krjan02", string device = "TeamsLocalLibary", string app = "NetPhone Teams Synchronisation", string appVersion = "1.0.0", string? token = null, CancellationToken cancellationToken = default)
+    {
+        clientInfo = new() {
+            App = app,
+            AppVersion = appVersion,
+            Device = device,
+            Manufacturer = manufacturer,
+            Token = token
+        };
+
+        if (autoConnect)
+            _ = Connect(true, cancellationToken);
+    }
+
+    public async Task Disconnect(CancellationToken cancellationToken = default)
+    {
+        if (ws is null) return;
+
+        var initialState = ws.State;
+
+        switch (ws.State)
+        {
+            case WebSocketState.Open:
+            case WebSocketState.Connecting:
+                await ws.CloseAsync(WebSocketCloseStatus.NormalClosure, null, cancellationToken);
+                break;
+            case WebSocketState.CloseSent:
+                await WaitClose(cancellationToken);
+                break;
+            case WebSocketState.CloseReceived:
+            case WebSocketState.Aborted:
+            case WebSocketState.Closed:
+            case WebSocketState.None:
+                break;
+        }
+
+        ws.Dispose();
+        ConnectionState?.Invoke(this, new ConnectionStateChangedEventArgs(ws.State));
+        ws = null;
+    }
+
+    public async Task Reconnect(bool waitForTeams, CancellationToken cancellationToken = default)
+    {
+        await Disconnect(cancellationToken);
+        await Connect(waitForTeams, cancellationToken);
+    }
+
+    private async Task WaitClose(CancellationToken cancellationToken = default)
+    {
+        if (ws is null) return;
+
+        while (ws is not null && ws.State != WebSocketState.Closed && ws.State != WebSocketState.Aborted)
+            await Task.Delay(25, cancellationToken);
+    }
+
+    private async Task WaitOpen(CancellationToken cancellationToken = default)
+    {
+        if (ws is null) throw new InvalidOperationException();
+
+        while (ws.State == WebSocketState.Connecting)
+            await Task.Delay(25, cancellationToken);
+    }
+
+    private async void Receive(CancellationToken cancellationToken = default)
+    {
+        if (ws is null || ws.State != WebSocketState.Open)
+            throw new InvalidOperationException("Not connected");
+
+        try
+        {
+            await receiveSemaphore.WaitAsync(cancellationToken);
+
+            var buffer = new byte[1024];
+
+            while (true)
+            {
+                var result = await ws.ReceiveAsync(buffer, cancellationToken);
+
+                if (result.MessageType == WebSocketMessageType.Close)
+                {
+                    if (ws.CloseStatus != WebSocketCloseStatus.NormalClosure)
+                    {
+                        ConnectionState?.Invoke(this, new ConnectionStateChangedEventArgs(this.ws.State));
+                        _ = Reconnect(true, cancellationToken);
+                    }
+
+                    return;
+                }
+
+                if (!result.EndOfMessage || result.Count == 0)
+                    throw new NotImplementedException("Invalid Message received");
+
+                var data = Encoding.UTF8.GetString(buffer, 0, result.Count);
+
+                var message = JsonSerializer.Deserialize<ServerMessage>(data, jsonSerializerOptions) ?? throw new InvalidDataException();
+
+                if (message.Response == "Success")
+                    SuccessReceived?.Invoke(this, new SuccessReceivedEventArgs(message.RequestId ?? 0));
+
+                if (!string.IsNullOrEmpty(message.ErrorMsg))
+                {
+                    if (message.ErrorMsg.EndsWith("no active call"))
+                        continue;
+
+                    ErrorReceived?.Invoke(this, new ErrorReceivedEventArgs(message.ErrorMsg));
+                }
+
+                if (message.TokenRefresh is not null)
+                {
+                    clientInfo.Token = message.TokenRefresh;
+                    TokenReceived?.Invoke(this, new TokenReceivedEventArgs(message.TokenRefresh));
+                }
+
+                if (message.MeetingUpdate is null || message.MeetingUpdate.MeetingState is null)
+                    continue;
+
+                if (isSharing != message.MeetingUpdate.MeetingState.IsSharing)
+                {
+                    isSharing = message.MeetingUpdate.MeetingState.IsSharing;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsSharing)));
+                }
+
+                if (isMuted != message.MeetingUpdate.MeetingState.IsMuted)
+                {
+                    isMuted = message.MeetingUpdate.MeetingState.IsMuted;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsMuted)));
+                }
+
+                if (hasUnreadMessages != message.MeetingUpdate.MeetingState.HasUnreadMessages)
+                {
+                    hasUnreadMessages = message.MeetingUpdate.MeetingState.HasUnreadMessages;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(HasUnreadMessages)));
+                }
+
+                if (isVideoOn != message.MeetingUpdate.MeetingState.IsVideoOn)
+                {
+                    isVideoOn = message.MeetingUpdate.MeetingState.IsVideoOn;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsVideoOn)));
+                }
+
+                if (isHandRaised != message.MeetingUpdate.MeetingState.IsHandRaised)
+                {
+                    isHandRaised = message.MeetingUpdate.MeetingState.IsHandRaised;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsHandRaised)));
+                }
+
+                if (isInMeeting != message.MeetingUpdate.MeetingState.IsInMeeting)
+                {
+                    isInMeeting = message.MeetingUpdate.MeetingState.IsInMeeting;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsInMeeting)));
+                }
+
+                if (isRecordingOn != message.MeetingUpdate.MeetingState.IsRecordingOn)
+                {
+                    isRecordingOn = message.MeetingUpdate.MeetingState.IsRecordingOn;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsRecordingOn)));
+                }
+
+                if (isBackgroundBlurred != message.MeetingUpdate.MeetingState.IsBackgroundBlurred)
+                {
+                    isBackgroundBlurred = message.MeetingUpdate.MeetingState.IsBackgroundBlurred;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsBackgroundBlurred)));
+                }
+
+                if (CanToggleMute != message.MeetingUpdate.MeetingPermissions.CanToggleMute)
+                {
+                    CanToggleMute = message.MeetingUpdate.MeetingPermissions.CanToggleMute;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CanToggleMute)));
+                }
+
+                if (CanToggleShareTray != message.MeetingUpdate.MeetingPermissions.CanToggleShareTray)
+                {
+                    CanToggleShareTray = message.MeetingUpdate.MeetingPermissions.CanToggleShareTray;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CanToggleShareTray)));
+                }
+
+                if (CanToggleVideo != message.MeetingUpdate.MeetingPermissions.CanToggleVideo)
+                {
+                    CanToggleVideo = message.MeetingUpdate.MeetingPermissions.CanToggleVideo;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CanToggleVideo)));
+                }
+
+                if (CanToggleHand != message.MeetingUpdate.MeetingPermissions.CanToggleHand)
+                {
+                    CanToggleHand = message.MeetingUpdate.MeetingPermissions.CanToggleHand;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CanToggleHand)));
+                }
+
+                if (CanToggleBlur != message.MeetingUpdate.MeetingPermissions.CanToggleBlur)
+                {
+                    CanToggleBlur = message.MeetingUpdate.MeetingPermissions.CanToggleBlur;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CanToggleBlur)));
+                }
+
+                if (CanToggleChat != message.MeetingUpdate.MeetingPermissions.CanToggleChat)
+                {
+                    CanToggleChat = message.MeetingUpdate.MeetingPermissions.CanToggleChat;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CanToggleChat)));
+                }
+
+                if (CanStopSharing != message.MeetingUpdate.MeetingPermissions.CanStopSharing)
+                {
+                    CanStopSharing = message.MeetingUpdate.MeetingPermissions.CanStopSharing;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CanStopSharing)));
+                }
+
+                if (CanLeave != message.MeetingUpdate.MeetingPermissions.CanLeave)
+                {
+                    CanLeave = message.MeetingUpdate.MeetingPermissions.CanLeave;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CanLeave)));
+                }
+
+                if (CanPair != message.MeetingUpdate.MeetingPermissions.CanPair)
+                {
+                    CanPair = message.MeetingUpdate.MeetingPermissions.CanPair;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CanPair)));
+                }
+
+                if (CanReact != message.MeetingUpdate.MeetingPermissions.CanReact)
+                {
+                    CanReact = message.MeetingUpdate.MeetingPermissions.CanReact;
+                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CanReact)));
+                }
+            }
+        }
+        catch (OperationCanceledException) { }
+        finally
+        {
+            receiveSemaphore.Release();
+
+            Console.WriteLine(ws == null);
+
+            if (ws is not null && ws.State != WebSocketState.Open && ws.State != WebSocketState.Connecting)
+                _ = Reconnect(true, cancellationToken);
+        }
+    }
+
+    public async Task<bool> Connect(bool waitForTeams = true, CancellationToken cancellationToken = default)
+    {
+        bool connectionSuccess = false;
+
+        try
+        {
+            await connectingSemaphore.WaitAsync(cancellationToken);
+
+            if (Process.GetProcessesByName("ms-teams").Length == 0 && !waitForTeams)
+                return false;
+
+            while (Process.GetProcessesByName("ms-teams").Length == 0)
+                await Task.Delay(1000, cancellationToken);
+
+            if (ws is not null)
+            {
+                switch (ws.State)
+                {
+                    case WebSocketState.Open:
+                        connectionSuccess = true;   
+                        break;
+                    case WebSocketState.Connecting:
+                        await WaitOpen(cancellationToken);
+                        connectionSuccess = true;
+                        break;
+                    case WebSocketState.Aborted:
+                    case WebSocketState.Closed:
+                    case WebSocketState.None:
+                        await Disconnect(cancellationToken);
+                        break;
+                    case WebSocketState.CloseReceived:
+                    case WebSocketState.CloseSent:
+                        await WaitClose(cancellationToken);
+                        await Disconnect(cancellationToken);
+                        break;
+                }
+            }
+
+            ws = new();
+
+            var url = clientInfo.GetServerUrl();
+
+            await ws.ConnectAsync(url, cancellationToken);
+            ConnectionState?.Invoke(this, new ConnectionStateChangedEventArgs(ws.State));
+
+            await WaitOpen(cancellationToken);
+
+            if (ws.State != WebSocketState.Open)
+                throw new WebSocketException($"Invalid state after connect: ${ws.State}");
+
+            connectionSuccess = true;
+            ConnectionState?.Invoke(this, new ConnectionStateChangedEventArgs(this.ws.State));
+            Receive(cancellationToken);
+            await SendCommand(MeetingAction.QueryMeetingState, null, cancellationToken);
+        }
+        catch (Exception)
+        {
+            connectionSuccess = false;
+        }
+        finally
+        {
+            connectingSemaphore.Release();
+        }
+
+        if (!connectionSuccess)
+            Connect(true, cancellationToken); //CS4014 I dont want to wait btw :)
+
+        return connectionSuccess;
+    }
+
+
+    private async Task SendCommand(MeetingAction action, ClientMessageParameterType? type = null, CancellationToken cancellationToken = default)
+    {
+        if (ws is null)
+        {
+            await Connect(true, cancellationToken);
+        }
+
+        switch (ws!.State)
+        {
+            case WebSocketState.Aborted:
+            case WebSocketState.CloseReceived:
+                await Connect(true, cancellationToken);
+                break;
+            case WebSocketState.Connecting:
+                await WaitOpen(cancellationToken);
+                break;
+            case WebSocketState.CloseSent:
+            case WebSocketState.Closed:
+                throw new InvalidOperationException("Not Connected");
+            case WebSocketState.Open:
+            case WebSocketState.None:
+                break;
+        }
+
+        var message = JsonSerializer.Serialize(new ClientMessage()
+        {
+            Action = action,
+            Parameters = type is null ? null : new ClientMessageParameter
+            {
+                Type = type.Value
+            }
+        }, jsonSerializerOptions);
+
+        try
+        {
+            await sendSemaphore.WaitAsync(cancellationToken);
+
+            await ws.SendAsync(Encoding.UTF8.GetBytes(message), WebSocketMessageType.Text, true, cancellationToken);
+        }
+        finally
+        {
+            sendSemaphore.Release();
+        }
+    }
+
+    public async Task LeaveCall(CancellationToken cancellationToken = default)
+        => await SendCommand(MeetingAction.LeaveCall, null, cancellationToken);
+
+    public async Task ReactApplause(CancellationToken cancellationToken = default)
+        => await SendCommand(MeetingAction.React, ClientMessageParameterType.ReactApplause, cancellationToken);
+
+    public async Task ReactLaugh(CancellationToken cancellationToken = default)
+        => await SendCommand(MeetingAction.React, ClientMessageParameterType.ReactLaugh, cancellationToken);
+
+    public async Task ReactLike(CancellationToken cancellationToken = default)
+        => await SendCommand(MeetingAction.React, ClientMessageParameterType.ReactLike, cancellationToken);
+
+    public async Task ReactLove(CancellationToken cancellationToken = default)
+        => await SendCommand(MeetingAction.React, ClientMessageParameterType.ReactLove, cancellationToken);
+
+    public async Task ReactWow(CancellationToken cancellationToken = default)
+        => await SendCommand(MeetingAction.React, ClientMessageParameterType.ReactWow, cancellationToken);
+
+    public async Task UpdateState(CancellationToken cancellationToken = default)
+        => await SendCommand(MeetingAction.QueryMeetingState, null, cancellationToken);
+
+    public async Task ToggleChat(CancellationToken cancellationToken = default)
+        => await SendCommand(MeetingAction.ToggleUI, ClientMessageParameterType.ToggleUiChat, cancellationToken);
+}
diff --git a/TeamsLocalAPI/ClientInfo.cs b/TeamsLocalAPI/ClientInfo.cs
new file mode 100644
index 0000000..2c569b1
--- /dev/null
+++ b/TeamsLocalAPI/ClientInfo.cs
@@ -0,0 +1,31 @@
+using System.Web;
+
+namespace TeamsLocalLibary;
+
+internal struct ClientInfo
+{
+    public string Manufacturer { init; get; }
+    public string Device { init; get; }
+    public string App { init; get; }
+    public string AppVersion { init; get; }
+    public string? Token { set; get; }
+
+    public readonly Uri GetServerUrl()
+    {
+        var query = HttpUtility.ParseQueryString(string.Empty);
+
+        query["protocol-version"] = "2.0.0";
+        query["manufacturer"] = Manufacturer;
+        query["device"] = Device;
+        query["app"] = App;
+        query["app-version"] = AppVersion;
+
+        if (Token is not null)
+            query["token"] = Token;
+
+        return new UriBuilder("ws://127.0.0.1:8124")
+        {
+            Query = query.ToString()
+        }.Uri;
+    }
+}
diff --git a/TeamsLocalAPI/ClientMessage.cs b/TeamsLocalAPI/ClientMessage.cs
new file mode 100644
index 0000000..c8663d7
--- /dev/null
+++ b/TeamsLocalAPI/ClientMessage.cs
@@ -0,0 +1,97 @@
+using System.Text.Json.Serialization;
+
+namespace TeamsLocalLibary;
+
+internal class ClientMessage
+{
+    public MeetingAction Action { get; set; }
+
+    public ClientMessageParameter? Parameters { get; set; }
+
+    public int RequestId { get; set; }
+}
+
+internal class ClientMessageParameter
+{
+    [JsonPropertyName("type")]
+    public ClientMessageParameterType Type { get; set; }
+}
+
+[JsonConverter(typeof(JsonStringEnumMemberConverter))]
+internal enum MeetingAction
+{
+    [JsonPropertyName("none")]
+    None = 0,
+
+    [JsonPropertyName("query-state")]
+    QueryMeetingState = 0b0000_0001_0000_0000,
+
+    [JsonPropertyName("mute")]
+    Mute = 0b0000_0010_0000_0000,
+    [JsonPropertyName("unmute")]
+    Unmute = 0b0000_0010_0000_0001,
+    [JsonPropertyName("toggle-mute")]
+    ToggleMute = 0b0000_0010_0000_0010,
+
+    [JsonPropertyName("hide-video")]
+    HideVideo = 0b0000_0011_0000_0000,
+    [JsonPropertyName("show-video")]
+    ShowVideo = 0b0000_0011_0000_0001,
+    [JsonPropertyName("toggle-video")]
+    ToggleVideo = 0b0000_0011_0000_0010,
+
+    [JsonPropertyName("unblur-background")]
+    UnblurBackground = 0b0000_0100_0000_0000,
+    [JsonPropertyName("blur-background")]
+    BlurBackground = 0b0000_0100_0000_0001,
+    [JsonPropertyName("toggle-background-blur")]
+    ToggleBlurBackground = 0b0000_0100_0000_0010,
+
+    [JsonPropertyName("lower-hand")]
+    LowerHand = 0b0000_0101_0000_0000,
+    [JsonPropertyName("raise-hand")]
+    RaiseHand = 0b0000_0101_0000_0001,
+    [JsonPropertyName("toggle-hand")]
+    ToggleHand = 0b0000_0101_0000_0010,
+
+    //[JsonPropertyName("stop-recording")]
+    //StopRecording = 0b0000_0110_0000_0000,
+    //[JsonPropertyName("start-recording")]
+    //StartRecording = 0b0000_0110_0000_0001,
+    //[JsonPropertyName("toggle-recording")]
+    //ToggleRecording = 0b0000_0110_0000_0010,
+
+    [JsonPropertyName("leave-call")]
+    LeaveCall = 0b0000_0111_0000_0000,
+
+    [JsonPropertyName("send-react")]
+    React     = 0b0000_1000_0000_0000,
+
+    [JsonPropertyName("toggle-ui")]
+    ToggleUI  = 0b0000_1001_0000_0000,
+
+    [JsonPropertyName("stop-sharing")]
+    StopSharing = 0b0000_1010_0000_0000,
+}
+
+
+[JsonConverter(typeof(JsonStringEnumMemberConverter))]
+internal enum ClientMessageParameterType
+{
+    [JsonPropertyName("applause")]
+    ReactApplause = 0b0000_0111_0001_0000,
+    [JsonPropertyName("laugh")]
+    ReactLaugh    = 0b0000_0111_0001_0001,
+    [JsonPropertyName("like")]
+    ReactLike     = 0b0000_0111_0001_0010,
+    [JsonPropertyName("love")]
+    ReactLove     = 0b0000_0111_0001_0011,
+    [JsonPropertyName("wow")]
+    ReactWow      = 0b0000_0111_0001_0100,
+
+    [JsonPropertyName("chat")]
+    ToggleUiChat    = 0b0000_1001_0000_0001,
+    [JsonPropertyName("sharing-tray")]
+    ToggleUiSharing = 0b0000_1001_0000_0010,
+
+}
diff --git a/TeamsLocalAPI/EventArgs/ConnectionStateChangedEventArgs.cs b/TeamsLocalAPI/EventArgs/ConnectionStateChangedEventArgs.cs
new file mode 100644
index 0000000..3b5981e
--- /dev/null
+++ b/TeamsLocalAPI/EventArgs/ConnectionStateChangedEventArgs.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.WebSockets;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TeamsLocalLibary.EventArgs
+{
+    public class ConnectionStateChangedEventArgs : System.EventArgs
+    {
+        public WebSocketState WebSocketState { get; }
+
+        public ConnectionStateChangedEventArgs(WebSocketState webSocketState)
+        {
+            WebSocketState = webSocketState;
+        }
+    }
+
+}
diff --git a/TeamsLocalAPI/EventArgs/ErrorReceivedEventArgs.cs b/TeamsLocalAPI/EventArgs/ErrorReceivedEventArgs.cs
new file mode 100644
index 0000000..93636ae
--- /dev/null
+++ b/TeamsLocalAPI/EventArgs/ErrorReceivedEventArgs.cs
@@ -0,0 +1,6 @@
+namespace TeamsLocalLibary.EventArgs;
+
+public class ErrorReceivedEventArgs(string errorMessage) : System.EventArgs
+{
+    public string ErrorMessage { get; } = errorMessage;
+}
diff --git a/TeamsLocalAPI/EventArgs/SuccessReceivedEventArgs.cs b/TeamsLocalAPI/EventArgs/SuccessReceivedEventArgs.cs
new file mode 100644
index 0000000..7e436b9
--- /dev/null
+++ b/TeamsLocalAPI/EventArgs/SuccessReceivedEventArgs.cs
@@ -0,0 +1,6 @@
+namespace TeamsLocalLibary.EventArgs;
+
+public class SuccessReceivedEventArgs(int requestId) : System.EventArgs
+{
+    public int RequestId { get; } = requestId;
+}
diff --git a/TeamsLocalAPI/EventArgs/TokenReceivedEventArgs.cs b/TeamsLocalAPI/EventArgs/TokenReceivedEventArgs.cs
new file mode 100644
index 0000000..454f1bf
--- /dev/null
+++ b/TeamsLocalAPI/EventArgs/TokenReceivedEventArgs.cs
@@ -0,0 +1,6 @@
+namespace TeamsLocalLibary.EventArgs;
+
+public class TokenReceivedEventArgs(string token) : System.EventArgs
+{
+    public string Token { get; } = token;
+}
diff --git a/TeamsLocalAPI/Icon.png b/TeamsLocalAPI/Icon.png
new file mode 100644
index 0000000..375a5b2
Binary files /dev/null and b/TeamsLocalAPI/Icon.png differ
diff --git a/TeamsLocalAPI/LICENSE b/TeamsLocalAPI/LICENSE
new file mode 100644
index 0000000..78efe40
--- /dev/null
+++ b/TeamsLocalAPI/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Robin Müller
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/TeamsLocalAPI/README.md b/TeamsLocalAPI/README.md
new file mode 100644
index 0000000..0d3108d
--- /dev/null
+++ b/TeamsLocalAPI/README.md
@@ -0,0 +1,9 @@
+# Third-party app API Client
+
+Use this Package to communicate with the [Microsoft Teams Third-party app API](https://support.microsoft.com/en-us/office/connect-third-party-devices-to-teams-aabca9f2-47bb-407f-9f9b-81a104a883d6)
+
+## Usage
+
+```
+dotnet add package Ro.Teams.LocalApi --version 0.3.0 --prerelease
+```
diff --git a/TeamsLocalAPI/ServerMessage.cs b/TeamsLocalAPI/ServerMessage.cs
new file mode 100644
index 0000000..ab19fb2
--- /dev/null
+++ b/TeamsLocalAPI/ServerMessage.cs
@@ -0,0 +1,43 @@
+namespace TeamsLocalLibary;
+
+internal class ServerMessage
+{
+    public int? RequestId = 0;
+    public string? Response { get; set; }
+    public string? ErrorMsg { get; set; }
+    public string? TokenRefresh { get; set; }
+    public MeetingUpdate? MeetingUpdate { get; set; }
+}
+
+internal class MeetingUpdate
+{
+    public MeetingState? MeetingState { get; set; }
+    public MeetingPermissions MeetingPermissions { get; set; } = new();
+
+}
+
+internal class MeetingState
+{
+    public bool IsMuted { get; set; }
+    public bool IsHandRaised { get; set; }
+    public bool IsInMeeting { get; set; }
+    public bool IsRecordingOn { get; set; }
+    public bool IsBackgroundBlurred { get; set; }
+    public bool IsSharing { get; set; }
+    public bool HasUnreadMessages { get; set; }
+    public bool IsVideoOn { get; set; }
+}
+
+internal class MeetingPermissions
+{
+    public bool CanToggleMute { get; set; }
+    public bool CanToggleVideo { get; set; }
+    public bool CanToggleHand { get; set; }
+    public bool CanToggleBlur { get; set; }
+    public bool CanLeave { get; set; }
+    public bool CanReact { get; set; }
+    public bool CanToggleShareTray { get; set; }
+    public bool CanToggleChat { get; set; }
+    public bool CanStopSharing { get; set; }
+    public bool CanPair { get; set; }
+}
diff --git a/TeamsLocalAPI/TeamsLocalLibary.csproj b/TeamsLocalAPI/TeamsLocalLibary.csproj
new file mode 100644
index 0000000..c5fee92
--- /dev/null
+++ b/TeamsLocalAPI/TeamsLocalLibary.csproj
@@ -0,0 +1,37 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <RootNamespace>$(MSBuildProjectName.Replace(" ", "_"))</RootNamespace>
+    <Authors>RoundRobin</Authors>
+    <IncludeSymbols>True</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
+    <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
+    <Title>API Client for the client side Teams API</Title>
+    <RepositoryUrl>https://github.com/MrRoundRobin/TeamsLocalApi.git</RepositoryUrl>
+    <RepositoryType>git</RepositoryType>
+    <PackageTags>Microsoft Teams; API</PackageTags>
+    <PackageReleaseNotes>improved resilience &amp; error handling</PackageReleaseNotes>
+    <PackageId>$(AssemblyName)</PackageId>
+    <Description>API Client for the client side Teams API</Description>
+    <PackageProjectUrl>https://github.com/MrRoundRobin/TeamsLocalApi</PackageProjectUrl>
+    <AssemblyVersion>0.4.0.0</AssemblyVersion>
+    <FileVersion>$(AssemblyVersion)</FileVersion>
+    <Version>$(AssemblyVersion)</Version>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Remove="LICENSE" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Macross.Json.Extensions" Version="3.0.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Page Include="LICENSE" />
+  </ItemGroup>
+
+</Project>
diff --git a/TeamsLocalAPI/TeamsStoragePartial.cs b/TeamsLocalAPI/TeamsStoragePartial.cs
new file mode 100644
index 0000000..8e1fdc8
--- /dev/null
+++ b/TeamsLocalAPI/TeamsStoragePartial.cs
@@ -0,0 +1,8 @@
+namespace TeamsLocalLibary
+{
+    internal class TeamsStoragePartial
+    {
+        public bool? EnableThirdPartyDevicesService { get; set; }
+        public string? TpdApiTokenString { get; set; }
+    }
+}
diff --git a/TeamsLocalAPI/UnixEpochDateTimeConverter.cs b/TeamsLocalAPI/UnixEpochDateTimeConverter.cs
new file mode 100644
index 0000000..3d0642f
--- /dev/null
+++ b/TeamsLocalAPI/UnixEpochDateTimeConverter.cs
@@ -0,0 +1,19 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+sealed class UnixEpochDateTimeConverter : JsonConverter<DateTime>
+{
+    static readonly DateTime s_epoch = new(1970, 1, 1, 0, 0, 0);
+
+    public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+    {
+        long unixTime = reader.GetInt64();
+        return s_epoch.AddMilliseconds(unixTime);
+    }
+
+    public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
+    {
+        long unixTime = Convert.ToInt64((value - s_epoch).TotalMilliseconds);
+        writer.WriteNumberValue(unixTime);
+    }
+}
\ No newline at end of file