diff --git a/server/controllers/BookUpdateCheckerController.js b/server/controllers/BookUpdateCheckerController.js
index 084c6582..8b54616e 100644
--- a/server/controllers/BookUpdateCheckerController.js
+++ b/server/controllers/BookUpdateCheckerController.js
@@ -14,7 +14,6 @@ class BookUpdateCheckerController {
         this.isDevelopment = (config.branch == 'development');
 
         this.bucServer = new BUCServer(config);
-        this.bucServer.main(); //no await
 
         this.wss = wss;
 
diff --git a/server/controllers/WebSocketController.js b/server/controllers/WebSocketController.js
index 8dc67a1c..43593e4b 100644
--- a/server/controllers/WebSocketController.js
+++ b/server/controllers/WebSocketController.js
@@ -4,6 +4,7 @@ const _ = require('lodash');
 const ReaderWorker = require('../core/Reader/ReaderWorker');//singleton
 const JembaReaderStorage = require('../core/Reader/JembaReaderStorage');//singleton
 const WorkerState = require('../core/WorkerState');//singleton
+const BUCClient = require('../core/BookUpdateChecker/BUCClient');//singleton
 const log = new (require('../core/AppLogger'))().log;//singleton
 const utils = require('../core/utils');
 
@@ -19,6 +20,10 @@ class WebSocketController {
         this.readerWorker = new ReaderWorker(config);
         this.workerState = new WorkerState();
 
+        if (config.bucEnabled) {
+            this.bucClient = new BUCClient(config);
+        }
+
         this.wss = wss;
 
         wss.on('connection', (ws) => {
@@ -76,6 +81,8 @@ class WebSocketController {
                     await this.uploadFileBuf(req, ws); break;
                 case 'upload-file-touch':
                     await this.uploadFileTouch(req, ws); break;
+                case 'check-buc':
+                    await this.checkBuc(req, ws); break;
 
                 default:
                     throw new Error(`Action not found: ${req.action}`);
@@ -179,6 +186,21 @@ class WebSocketController {
         
         this.send({url: await this.readerWorker.uploadFileTouch(req.url)}, req, ws);
     }
+
+    async checkBuc(req, ws) {
+        if (!this.config.bucEnabled)
+            throw new Error('BookUpdateChecker disabled');
+
+        if (!req.bookUrls)
+            throw new Error(`key 'bookUrls' is empty`);
+
+        if (!Array.isArray(req.bookUrls))
+            throw new Error(`key 'bookUrls' must be array`);
+
+        const data = await this.bucClient.checkBuc(req.bookUrls);
+
+        this.send({state: 'success', data}, req, ws);
+    }
 }
 
 module.exports = WebSocketController;
diff --git a/server/core/BookUpdateChecker/BUCClient.js b/server/core/BookUpdateChecker/BUCClient.js
index e69de29b..96c6780d 100644
--- a/server/core/BookUpdateChecker/BUCClient.js
+++ b/server/core/BookUpdateChecker/BUCClient.js
@@ -0,0 +1,64 @@
+const JembaConnManager = require('../../db/JembaConnManager');//singleton
+
+const ayncExit = new (require('../AsyncExit'))();
+const utils = require('../utils');
+const log = new (require('../AppLogger'))().log;//singleton
+
+const minuteMs = 60*1000;
+const hourMs = 60*minuteMs;
+
+let instance = null;
+
+//singleton
+class BUCClient {
+    constructor(config) {
+        if (!instance) {
+            this.config = config;
+
+            this.connManager = new JembaConnManager();
+            this.db = this.connManager.db['book-update-server'];
+
+            //константы
+            if (this.config.branch !== 'development') {
+                this.syncPeriod = 1*hourMs;//период синхронизации с сервером BUC
+            } else {
+                this.syncPeriod = 1*minuteMs;//период синхронизации с сервером BUC
+            }
+
+            this.fromCheckTime = 1;
+
+            this.main();//no await
+
+            instance = this;
+        }
+
+        return instance;
+    }
+
+    async checkBuc(bookUrls) {
+        return [];
+    }
+
+    async findMaxCheckTime() {
+        let result = 1;
+
+        return result;
+    }
+
+    async main() {
+        if (!this.config.bucEnabled)
+            throw new Error('BookUpdateChecker disabled');
+
+        try {
+            this.fromCheckTime = await this.findMaxCheckTime();
+            this.periodicSync();//no await
+
+            log(`BUC Client started`);
+        } catch (e) {
+            log(LM_FATAL, e.stack);
+            ayncExit.exit(1);
+        }
+    }
+}
+
+module.exports = BUCClient;
\ No newline at end of file
diff --git a/server/core/BookUpdateChecker/BUCServer.js b/server/core/BookUpdateChecker/BUCServer.js
index 796a9677..4a9c6457 100644
--- a/server/core/BookUpdateChecker/BUCServer.js
+++ b/server/core/BookUpdateChecker/BUCServer.js
@@ -17,7 +17,7 @@ let instance = null;
 class BUCServer {
     constructor(config) {
         if (!instance) {
-            this.config = Object.assign({}, config);
+            this.config = config;
 
             //константы
             if (this.config.branch !== 'development') {
@@ -52,6 +52,8 @@ class BUCServer {
             this.checkQueue = [];
             this.hostChecking = {};
 
+            this.main(); //no await
+
             instance = this;
         }
 
@@ -260,9 +262,9 @@ await this.db.insert({
             for (let i = 0; i < 10; i++)
                 this.periodicCheck();//no await
 
-            log(`---------------------------`);
-            log(`Book Update checker started`);
-            log(`---------------------------`);
+            log(`------------------`);
+            log(`BUC Server started`);
+            log(`------------------`);
         } catch (e) {
             log(LM_FATAL, e.stack);
             ayncExit.exit(1);
@@ -270,4 +272,4 @@ await this.db.insert({
     }
 }
 
-module.exports = BUCServer;
\ No newline at end of file
+module.exports = BUCServer;