diff --git a/sonar-project.properties b/sonar-project.properties
new file mode 100644
index 00000000..b2b70bb5
--- /dev/null
+++ b/sonar-project.properties
@@ -0,0 +1 @@
+sonar.exclusions=src/main/generated/**
diff --git a/src/main/services/ws/events/friend-game-session.ts b/src/main/services/ws/events/friend-game-session.ts
new file mode 100644
index 00000000..930b4885
--- /dev/null
+++ b/src/main/services/ws/events/friend-game-session.ts
@@ -0,0 +1,17 @@
+import type { FriendGameSession } from "@main/generated/envelope";
+import { HydraApi } from "@main/services/hydra-api";
+import { publishFriendStartedPlayingGameNotification } from "@main/services/notifications";
+import { GameStats } from "@types";
+
+export const friendGameSessionEvent = async (payload: FriendGameSession) => {
+  const [friend, gameStats] = await Promise.all([
+    HydraApi.get(`/users/${payload.friendId}`),
+    HydraApi.get<GameStats>(
+      `/games/stats?objectId=${payload.objectId}&shop=steam`
+    ),
+  ]);
+
+  if (friend && gameStats) {
+    publishFriendStartedPlayingGameNotification(friend, gameStats);
+  }
+};
diff --git a/src/main/services/ws/events/friend-request.ts b/src/main/services/ws/events/friend-request.ts
new file mode 100644
index 00000000..8faa38a5
--- /dev/null
+++ b/src/main/services/ws/events/friend-request.ts
@@ -0,0 +1,16 @@
+import type { FriendRequest } from "@main/generated/envelope";
+import { HydraApi } from "@main/services/hydra-api";
+import { publishNewFriendRequestNotification } from "@main/services/notifications";
+import { WindowManager } from "@main/services/window-manager";
+
+export const friendRequestEvent = async (payload: FriendRequest) => {
+  WindowManager.mainWindow?.webContents.send("on-sync-friend-requests", {
+    friendRequestCount: payload.friendRequestCount,
+  });
+
+  const user = await HydraApi.get(`/users/${payload.senderId}`);
+
+  if (user) {
+    publishNewFriendRequestNotification(user);
+  }
+};
diff --git a/src/main/services/ws/index.ts b/src/main/services/ws/index.ts
new file mode 100644
index 00000000..39bb25dc
--- /dev/null
+++ b/src/main/services/ws/index.ts
@@ -0,0 +1 @@
+export * from "./ws-client";
diff --git a/src/main/services/ws/ws-client.ts b/src/main/services/ws/ws-client.ts
new file mode 100644
index 00000000..632a3107
--- /dev/null
+++ b/src/main/services/ws/ws-client.ts
@@ -0,0 +1,119 @@
+import { WebSocket } from "ws";
+import { HydraApi } from "../hydra-api";
+import { Envelope } from "@main/generated/envelope";
+import { logger } from "../logger";
+import { friendRequestEvent } from "./events/friend-request";
+import { friendGameSessionEvent } from "./events/friend-game-session";
+
+export class WSClient {
+  private static ws: WebSocket | null = null;
+  private static reconnectInterval = 1_000;
+  private static readonly maxReconnectInterval = 30_000;
+  private static shouldReconnect = true;
+  private static reconnecting = false;
+  private static heartbeatInterval: NodeJS.Timeout | null = null;
+
+  static async connect() {
+    this.shouldReconnect = true;
+
+    try {
+      const { token } = await HydraApi.post<{ token: string }>("/auth/ws");
+
+      this.ws = new WebSocket(import.meta.env.MAIN_VITE_WS_URL, {
+        headers: {
+          Authorization: `Bearer ${token}`,
+        },
+      });
+
+      this.ws.on("open", () => {
+        logger.info("WS connected");
+        this.reconnectInterval = 1000;
+        this.reconnecting = false;
+
+        this.startHeartbeat();
+      });
+
+      this.ws.on("message", (message) => {
+        const envelope = Envelope.fromBinary(
+          new Uint8Array(Buffer.from(message.toString()))
+        );
+
+        logger.info("Received WS envelope:", envelope);
+
+        if (envelope.payload.oneofKind === "friendRequest") {
+          friendRequestEvent(envelope.payload.friendRequest);
+        }
+
+        if (envelope.payload.oneofKind === "friendGameSession") {
+          friendGameSessionEvent(envelope.payload.friendGameSession);
+        }
+      });
+
+      this.ws.on("close", () => this.handleDisconnect("close"));
+      this.ws.on("error", (err) => {
+        logger.error("WS error:", err);
+        this.handleDisconnect("error");
+      });
+    } catch (err) {
+      logger.error("Failed to connect WS:", err);
+      this.handleDisconnect("auth-failed");
+    }
+  }
+
+  private static handleDisconnect(reason: string) {
+    logger.warn(`WS disconnected due to ${reason}`);
+
+    if (this.shouldReconnect) {
+      this.cleanupSocket();
+      this.tryReconnect();
+    }
+  }
+
+  private static async tryReconnect() {
+    if (this.reconnecting) return;
+    this.reconnecting = true;
+
+    logger.info(`Reconnecting in ${this.reconnectInterval / 1000}s...`);
+
+    setTimeout(async () => {
+      try {
+        await this.connect();
+      } catch (err) {
+        logger.error("Reconnect failed:", err);
+        this.reconnectInterval = Math.min(
+          this.reconnectInterval * 2,
+          this.maxReconnectInterval
+        );
+        this.reconnecting = false;
+        this.tryReconnect();
+      }
+    }, this.reconnectInterval);
+  }
+
+  private static cleanupSocket() {
+    if (this.ws) {
+      this.ws.removeAllListeners();
+      this.ws.close();
+      this.ws = null;
+    }
+
+    if (this.heartbeatInterval) {
+      clearInterval(this.heartbeatInterval);
+      this.heartbeatInterval = null;
+    }
+  }
+
+  public static close() {
+    this.shouldReconnect = false;
+    this.reconnecting = false;
+    this.cleanupSocket();
+  }
+
+  private static startHeartbeat() {
+    this.heartbeatInterval = setInterval(() => {
+      if (this.ws && this.ws.readyState === WebSocket.OPEN) {
+        this.ws.ping();
+      }
+    }, 15_000);
+  }
+}