diff --git a/.env.development b/.env.development
index 3743930..58cf9aa 100644
--- a/.env.development
+++ b/.env.development
@@ -1,3 +1,3 @@
-
-VITE_API_FETCH_URL=https://pc-003.techform-dom.local/SmartMenuiserieTemplate/Service.svc/GetSVGLayoutConfiguration
-VITE_API_POST_URL=https://pc-003.techform-dom.local/SmartMenuiserieTemplate/Service.svc/ApplicationState
\ No newline at end of file
+VITE_API_FETCH_URL=http://localhost:5000
+VITE_API_SET_CONTAINER_LIST_URL=http://localhost:5000/SetContainerList
+VITE_API_GET_FEEDBACK_URL=http://localhost:5000/GetFeedback
\ No newline at end of file
diff --git a/.env.production b/.env.production
index 3743930..4eb6fb6 100644
--- a/.env.production
+++ b/.env.production
@@ -1,3 +1,3 @@
-
-VITE_API_FETCH_URL=https://pc-003.techform-dom.local/SmartMenuiserieTemplate/Service.svc/GetSVGLayoutConfiguration
-VITE_API_POST_URL=https://pc-003.techform-dom.local/SmartMenuiserieTemplate/Service.svc/ApplicationState
\ No newline at end of file
+VITE_API_FETCH_URL=https://localhost/SmartMenuiserieTemplate/Service.svc/GetSVGLayoutConfiguration
+VITE_API_SET_CONTAINER_LIST_URL=https://localhost/SmartMenuiserieTemplate/Service.svc/SetContainerList
+VITE_API_GET_FEEDBACK_URL=https://localhost/SmartMenuiserieTemplate/Service.svc/GetFeedback
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..58cb1d4
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,5 @@
+{
+  "eslint.rules.customizations": [
+    { "rule": "*", "severity": "warn" }
+  ]
+}
\ No newline at end of file
diff --git a/public/workers/message_worker.js b/public/workers/message_worker.js
new file mode 100644
index 0000000..1996d83
--- /dev/null
+++ b/public/workers/message_worker.js
@@ -0,0 +1,63 @@
+const DELAY_BEFORE_SEND = 200;
+const queue = [];
+let messagePacket = [];
+onmessage = async(e) => {
+  let packetLength
+
+  const url = e.data.url;
+  const state = e.data.state;
+  const request = {
+    ApplicationState: state
+  };
+  const dataParsed = JSON.stringify(request, GetCircularReplacerKeepDataStructure());
+  queue.push(request);
+  fetch(url, {
+      method: 'POST',
+      headers: new Headers({
+        // eslint-disable-next-line @typescript-eslint/naming-convention
+        'Content-Type': 'application/json'
+      }),
+      body: dataParsed
+    })
+      .then((response) =>
+        response.json()
+      )
+      .then(async(json) => {
+        messagePacket.push.apply(messagePacket, json.messages);
+        queue.pop();
+
+        // The sleep allow the message packet to be filled by
+        // others requests before being sent as a single batch
+        // Reducing the wait time will reduce latency but increase error rate
+        let doLoop = true;
+        do {
+          packetLength = messagePacket.length;
+          await sleep(DELAY_BEFORE_SEND);
+          const newPacketLength = messagePacket.length;
+          doLoop = newPacketLength !== packetLength;
+          packetLength = newPacketLength;
+        } while (doLoop);
+
+        if (queue.length <= 0 && messagePacket.length > 0) {
+          console.debug(`[GetFeedback] Packet size before sent: ${messagePacket.length}`)
+          postMessage(messagePacket)
+          messagePacket.splice(0);
+        }
+      });
+};
+
+function sleep(ms) {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}
+
+function GetCircularReplacerKeepDataStructure()
+{
+  return (key, value) => {
+    if (key === 'parent') {
+      return;
+    }
+
+    return value;
+  };
+}
+
diff --git a/src/Components/API/api.ts b/src/Components/API/api.ts
index ac6b52c..986b3e3 100644
--- a/src/Components/API/api.ts
+++ b/src/Components/API/api.ts
@@ -33,7 +33,7 @@ export async function FetchConfiguration(): Promise<IConfiguration> {
 }
 
 export async function SetContainerList(request: ISetContainerListRequest): Promise<ISetContainerListResponse> {
-  const url = import.meta.env.VITE_API_POST_URL;
+  const url = import.meta.env.VITE_API_SET_CONTAINER_LIST_URL;
   const dataParsed = JSON.stringify(request, GetCircularReplacerKeepDataStructure());
   // The test library cannot use the Fetch API
   // @ts-expect-error
diff --git a/src/Components/Bar/Bar.tsx b/src/Components/Bar/Bar.tsx
index 7125f30..ecfb20e 100644
--- a/src/Components/Bar/Bar.tsx
+++ b/src/Components/Bar/Bar.tsx
@@ -1,4 +1,4 @@
-import { ClockIcon, CubeIcon, LinkIcon } from '@heroicons/react/outline';
+import { ClockIcon, CubeIcon, LinkIcon, MailIcon } from '@heroicons/react/outline';
 import * as React from 'react';
 import { BarIcon } from './BarIcon';
 
@@ -7,9 +7,11 @@ interface IBarProps {
   isSymbolsOpen: boolean
   isElementsSidebarOpen: boolean
   isHistoryOpen: boolean
+  isMessagesOpen: boolean
   toggleSidebar: () => void
   toggleSymbols: () => void
   toggleTimeline: () => void
+  toggleMessages: () => void
 }
 
 export const BAR_WIDTH = 64; // 4rem
@@ -35,6 +37,12 @@ export function Bar(props: IBarProps): JSX.Element {
         onClick={() => props.toggleTimeline()}>
         <ClockIcon className='heroicon' />
       </BarIcon>
+      <BarIcon
+        isActive={props.isMessagesOpen}
+        title='Messages'
+        onClick={() => props.toggleMessages()}>
+        <MailIcon className='heroicon' />
+      </BarIcon>
     </div>
   );
 }
diff --git a/src/Components/MessagesSidebar/MessagesSidebar.tsx b/src/Components/MessagesSidebar/MessagesSidebar.tsx
new file mode 100644
index 0000000..c166e18
--- /dev/null
+++ b/src/Components/MessagesSidebar/MessagesSidebar.tsx
@@ -0,0 +1,100 @@
+import { TrashIcon } from '@heroicons/react/outline';
+import * as React from 'react';
+import { FixedSizeList as List } from 'react-window';
+import { MessageType } from '../../Enums/MessageType';
+import { IHistoryState } from '../../Interfaces/IHistoryState';
+import { IMessage } from '../../Interfaces/IMessage';
+
+interface IMessagesSidebarProps {
+  historyState: IHistoryState
+  isOpen: boolean
+}
+
+const myWorker = new Worker('workers/message_worker.js');
+
+function UseWorker(
+  state: IHistoryState,
+  messages: IMessage[],
+  setMessages: React.Dispatch<React.SetStateAction<IMessage[]>>
+): void {
+  React.useEffect(() => {
+    // use webworker for the stringify to avoid freezing
+    myWorker.postMessage({
+      state,
+      url: import.meta.env.VITE_API_GET_FEEDBACK_URL
+    });
+
+    return () => {
+    };
+  }, [state]);
+
+  React.useEffect(() => {
+    myWorker.onmessage = (event) => {
+      setMessages(messages.concat(event.data as IMessage[]));
+    };
+  }, [messages, setMessages]);
+}
+
+export function MessagesSidebar(props: IMessagesSidebarProps): JSX.Element {
+  const [messages, setMessages] = React.useState<IMessage[]>([]);
+
+  UseWorker(
+    props.historyState,
+    messages,
+    setMessages
+  );
+
+  function Row({ index, style }: {index: number, style: React.CSSProperties}): JSX.Element {
+    const reversedIndex = (messages.length - 1) - index;
+    const message = messages[reversedIndex];
+    let classType = '';
+    switch (message.type) {
+      case MessageType.Success:
+        classType = 'bg-green-400 hover:bg-green-400/60';
+        break;
+
+      case MessageType.Warning:
+        classType = 'bg-yellow-400 hover:bg-yellow-400/60';
+        break;
+
+      case MessageType.Error:
+        classType = 'bg-red-400 hover:bg-red-400/60';
+        break;
+    }
+    return (<p
+      key={`m-${reversedIndex}`}
+      className={`p-2 ${classType}`}
+      style={style}
+    >
+      {message.text}
+    </p>);
+  }
+
+  const isOpenClasses = props.isOpen ? 'left-16' : '-left-64';
+  return (
+    <div className={`fixed z-10 bg-slate-200
+      text-gray-700 transition-all h-full w-64
+      ${isOpenClasses}`}>
+      <div className='bg-slate-100 sidebar-title flex place-content-between'>
+        Messages
+        <button
+          onClick={() => { setMessages([]); }}
+          className='h-6'
+          aria-label='Clear all messages'
+          title='Clear all messages'
+        >
+          <TrashIcon className='heroicon'></TrashIcon>
+        </button>
+      </div>
+      <List
+        className='List md:text-xs font-bold'
+        itemCount={messages.length}
+        itemSize={65}
+        height={window.innerHeight}
+        width={256}
+      >
+        {Row}
+      </List>
+    </div>
+  );
+};
diff --git a/src/Components/UI/UI.tsx b/src/Components/UI/UI.tsx
index f232434..3561453 100644
--- a/src/Components/UI/UI.tsx
+++ b/src/Components/UI/UI.tsx
@@ -12,6 +12,7 @@ import { IAvailableSymbol } from '../../Interfaces/IAvailableSymbol';
 import { Symbols } from '../Symbols/Symbols';
 import { SymbolsSidebar } from '../SymbolsSidebar/SymbolsSidebar';
 import { PropertyType } from '../../Enums/PropertyType';
+import { MessagesSidebar } from '../MessagesSidebar/MessagesSidebar';
 
 interface IUIProps {
   selectedContainer: IContainerModel | undefined
@@ -36,16 +37,19 @@ interface IUIProps {
 
 function CloseOtherSidebars(
   setIsSidebarOpen: React.Dispatch<React.SetStateAction<boolean>>,
-  setIsSymbolsOpen: React.Dispatch<React.SetStateAction<boolean>>
+  setIsSymbolsOpen: React.Dispatch<React.SetStateAction<boolean>>,
+  setIsMessagesOpen: React.Dispatch<React.SetStateAction<boolean>>
 ): void {
   setIsSidebarOpen(false);
   setIsSymbolsOpen(false);
+  setIsMessagesOpen(false);
 }
 
 export function UI(props: IUIProps): JSX.Element {
   const [isSidebarOpen, setIsSidebarOpen] = React.useState(true);
   const [isSymbolsOpen, setIsSymbolsOpen] = React.useState(false);
   const [isHistoryOpen, setIsHistoryOpen] = React.useState(false);
+  const [isMessagesOpen, setIsMessagesOpen] = React.useState(false);
 
   let buttonRightOffsetClasses = 'right-12';
   if (isSidebarOpen || isHistoryOpen || isSymbolsOpen) {
@@ -62,15 +66,20 @@ export function UI(props: IUIProps): JSX.Element {
         isSymbolsOpen={isSymbolsOpen}
         isElementsSidebarOpen={isSidebarOpen}
         isHistoryOpen={isHistoryOpen}
+        isMessagesOpen={isMessagesOpen}
         toggleSidebar={() => {
-          CloseOtherSidebars(setIsSidebarOpen, setIsSymbolsOpen);
+          CloseOtherSidebars(setIsSidebarOpen, setIsSymbolsOpen, setIsMessagesOpen);
           setIsSidebarOpen(!isSidebarOpen);
         } }
         toggleSymbols={() => {
-          CloseOtherSidebars(setIsSidebarOpen, setIsSymbolsOpen);
+          CloseOtherSidebars(setIsSidebarOpen, setIsSymbolsOpen, setIsMessagesOpen);
           setIsSymbolsOpen(!isSymbolsOpen);
         } }
-        toggleTimeline={() => setIsHistoryOpen(!isHistoryOpen)} />
+        toggleTimeline={() => setIsHistoryOpen(!isHistoryOpen)}
+        toggleMessages={() => {
+          CloseOtherSidebars(setIsSidebarOpen, setIsSymbolsOpen, setIsMessagesOpen);
+          setIsMessagesOpen(!isMessagesOpen);
+        } }/>
 
       <Sidebar
         componentOptions={props.availableContainers}
@@ -98,6 +107,10 @@ export function UI(props: IUIProps): JSX.Element {
         onPropertyChange={props.onSymbolPropertyChange}
         selectSymbol={props.selectSymbol}
       />
+      <MessagesSidebar
+        historyState={props.current}
+        isOpen={isMessagesOpen}
+      />
       <History
         history={props.history}
         historyCurrentStep={props.historyCurrentStep}
diff --git a/src/Enums/MessageType.ts b/src/Enums/MessageType.ts
new file mode 100644
index 0000000..b84bc13
--- /dev/null
+++ b/src/Enums/MessageType.ts
@@ -0,0 +1,6 @@
+export enum MessageType {
+  Normal,
+  Success,
+  Warning,
+  Error
+}
diff --git a/src/Interfaces/IGetFeedbackRequest.ts b/src/Interfaces/IGetFeedbackRequest.ts
new file mode 100644
index 0000000..ff3d665
--- /dev/null
+++ b/src/Interfaces/IGetFeedbackRequest.ts
@@ -0,0 +1,7 @@
+/* eslint-disable @typescript-eslint/naming-convention */
+import { IHistoryState } from './IHistoryState';
+
+export interface IGetFeedbackRequest {
+  /** Current application state */
+  ApplicationState: IHistoryState
+}
diff --git a/src/Interfaces/IGetFeedbackResponse.ts b/src/Interfaces/IGetFeedbackResponse.ts
new file mode 100644
index 0000000..4e19d7d
--- /dev/null
+++ b/src/Interfaces/IGetFeedbackResponse.ts
@@ -0,0 +1,7 @@
+/* eslint-disable @typescript-eslint/naming-convention */
+
+import { IMessage } from './IMessage';
+
+export interface IGetFeedbackResponse {
+  messages: IMessage[]
+}
diff --git a/src/Interfaces/IMessage.ts b/src/Interfaces/IMessage.ts
new file mode 100644
index 0000000..605843e
--- /dev/null
+++ b/src/Interfaces/IMessage.ts
@@ -0,0 +1,6 @@
+import { MessageType } from '../Enums/MessageType';
+
+export interface IMessage {
+  text: string
+  type: MessageType
+}
diff --git a/src/vite-env.d.ts b/src/vite-env.d.ts
index c38ec22..3fc526e 100644
--- a/src/vite-env.d.ts
+++ b/src/vite-env.d.ts
@@ -2,7 +2,8 @@
 
 interface ImportMetaEnv {
   readonly VITE_API_FETCH_URL: string
-  readonly VITE_API_POST_URL: string
+  readonly VITE_API_SET_CONTAINER_LIST_URL: string
+  readonly VITE_API_GET_FEEDBACK_URL: string
   // more env variables...
 }
 
diff --git a/test-server/http.js b/test-server/http.js
index 3287382..1ddf246 100644
--- a/test-server/http.js
+++ b/test-server/http.js
@@ -10,7 +10,7 @@ serve({
       let json;
       if (url.pathname === '/GetSVGLayoutConfiguration') {
         json = GetSVGLayoutConfiguration();
-      } else if (url.pathname === '/ApplicationState') {
+      } else if (url.pathname === '/SetContainerList') {
         const bodyParsed = await request.json();
         console.log(bodyParsed);
         switch (bodyParsed.Action) {
@@ -23,6 +23,17 @@ serve({
           default:
             break;
         }
+      } else if (url.pathname === '/GetFeedback') {
+        const bodyParsed = await request.json();
+        console.log(bodyParsed);
+        json = {
+          messages: [
+            {
+              text: `${new Date()}`,
+              type: 3
+            }
+          ]
+        }
       } else {
         // TODO: Return 404 rather than this
         json = GetSVGLayoutConfiguration();
diff --git a/test-server/node-http.js b/test-server/node-http.js
index f2d3594..7a31253 100644
--- a/test-server/node-http.js
+++ b/test-server/node-http.js
@@ -10,7 +10,7 @@ const requestListener = async(request, response) => {
     response.setHeader('Content-Type', 'application/json');
     const url = request.url;
     let json;
-    if (url === '/ApplicationState') {
+    if (url === '/SetContainerList') {
       const buffers = [];
       for await (const chunk of request) {
         buffers.push(chunk);