diff --git a/src/app/common/actions/send-request-account-response.spec.ts b/src/app/common/actions/send-request-account-response.spec.ts
index c633761eb22..713585446cc 100644
--- a/src/app/common/actions/send-request-account-response.spec.ts
+++ b/src/app/common/actions/send-request-account-response.spec.ts
@@ -17,8 +17,8 @@ describe(sendRequestAccountResponseToTab.name, () => {
       } as any,
     });
     expect(sendMessageToTab).toHaveBeenCalledTimes(1);
-    expect(sendMessageToTab).toHaveBeenCalledWith(2, '1', [
-      { dataPublicKey: 'dataKey1', stxPublicKey: 'pubKey1' },
-    ]);
+    expect(sendMessageToTab).toHaveBeenCalledWith(2, '1', {
+      result: [{ dataPublicKey: 'dataKey1', stxPublicKey: 'pubKey1' }],
+    });
   });
 });
diff --git a/src/app/common/actions/send-request-account-response.ts b/src/app/common/actions/send-request-account-response.ts
index f10bd2e77de..d0713aef2d1 100644
--- a/src/app/common/actions/send-request-account-response.ts
+++ b/src/app/common/actions/send-request-account-response.ts
@@ -14,5 +14,9 @@ export function sendRequestAccountResponseToTab(args: SendRequestAccountResponse
     dataPublicKey: account.dataPublicKey,
   };
 
-  return sendMessageToTab(parseInt(tabId), id, [safeAccountKeys]);
+  return sendMessageToTab(parseInt(tabId), id, { result: [safeAccountKeys] });
+}
+
+export function sendUserDeniesAccountRequest({ tabId, id }: { tabId: string; id: string }) {
+  return sendMessageToTab(parseInt(tabId), id, { error: { code: 4000, message: 'lskdjflksjdfl' } });
 }
diff --git a/src/app/pages/choose-account-request/account-request.tsx b/src/app/pages/choose-account-request/account-request.tsx
index d2dfd537f5b..b370fcc8a06 100644
--- a/src/app/pages/choose-account-request/account-request.tsx
+++ b/src/app/pages/choose-account-request/account-request.tsx
@@ -1,13 +1,18 @@
+import { logger } from '@shared/logger';
+
 import { useRouteHeader } from '@app/common/hooks/use-route-header';
 import { useAppDetails } from '@app/common/hooks/auth/use-app-details';
 import { Header } from '@app/components/header';
 import { AccountPicker } from '@app/features/account-picker/accounts';
 import { useAccounts } from '@app/store/accounts/account.hooks';
 import { AccountPickerLayout } from '@app/features/account-picker/account-picker.layout';
-import { logger } from '@shared/logger';
-import { sendRequestAccountResponseToTab } from '@app/common/actions/send-request-account-response';
+import {
+  sendRequestAccountResponseToTab,
+  sendUserDeniesAccountRequest,
+} from '@app/common/actions/send-request-account-response';
 
 import { useAccountRequestSearchParams } from './use-account-request-search-params';
+import { useEffect } from 'react';
 
 export function AccountRequest() {
   const accounts = useAccounts();
@@ -29,6 +34,19 @@ export function AccountRequest() {
     window.close();
   };
 
+  const handleUnmount = () => {
+    if (!tabId || !id) {
+      logger.error('Missing either tabId or uuid. Both values are necessary to respond to app');
+      return;
+    }
+    sendUserDeniesAccountRequest({ tabId, id });
+  };
+
+  useEffect(() => {
+    window.addEventListener('beforeunload', handleUnmount);
+    return () => window.removeEventListener('beforeunload', handleUnmount);
+  }, []);
+
   return (
     <AccountPickerLayout appName={appName}>
       <AccountPicker
diff --git a/src/app/store/apps/apps.actions.ts b/src/app/store/apps/apps.actions.ts
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/src/app/store/apps/apps.selectors.ts b/src/app/store/apps/apps.selectors.ts
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/src/app/store/apps/apps.slice.ts b/src/app/store/apps/apps.slice.ts
new file mode 100644
index 00000000000..8bd48a14f85
--- /dev/null
+++ b/src/app/store/apps/apps.slice.ts
@@ -0,0 +1,17 @@
+import { createEntityAdapter, createSlice } from '@reduxjs/toolkit';
+
+interface AppDetails {
+  domain: string;
+}
+
+const appsAdapter = createEntityAdapter<AppDetails>({
+  selectId: entity => entity.domain,
+});
+
+export const appsSlice = createSlice({
+  name: 'apps',
+  initialState: appsAdapter.getInitialState(),
+  reducers: {
+    appConnected: appsAdapter.addOne,
+  },
+});
diff --git a/src/app/store/index.ts b/src/app/store/index.ts
index b2eb1e34c41..eb47923f143 100644
--- a/src/app/store/index.ts
+++ b/src/app/store/index.ts
@@ -20,10 +20,12 @@ import { inMemoryKeySlice } from './in-memory-key/in-memory-key.slice';
 import { ExtensionStorage } from './utils/extension-storage';
 import { onboardingSlice } from './onboarding/onboarding.slice';
 import { analyticsSlice } from './analytics/analytics.slice';
+import { appsSlice } from './apps/apps.slice';
 
 const storage = new ExtensionStorage(chrome.storage.local, chrome.runtime);
 
 const rootReducer = combineReducers({
+  apps: appsSlice.reducer,
   keys: keySlice.reducer,
   chains: combineReducers({
     stx: stxChainSlice.reducer,
diff --git a/src/background/background.ts b/src/background/background.ts
index 631b5044c8d..e752c2988fa 100755
--- a/src/background/background.ts
+++ b/src/background/background.ts
@@ -9,7 +9,6 @@ import { logger } from '@shared/logger';
 import {
   CONTENT_SCRIPT_PORT,
   LegacyMessageFromContentScript,
-  MESSAGE_SOURCE,
   RpcMethods,
   SupportedRpcMessages,
 } from '@shared/message-types';
@@ -44,6 +43,7 @@ chrome.runtime.onInstalled.addListener(details => {
 chrome.runtime.onConnect.addListener(port =>
   Sentry.wrap(() => {
     if (port.name !== CONTENT_SCRIPT_PORT) return;
+
     port.onMessage.addListener(
       (message: LegacyMessageFromContentScript | SupportedRpcMessages, port) => {
         if (inferLegacyMessage(message)) {
@@ -59,16 +59,9 @@ chrome.runtime.onConnect.addListener(port =>
             const params = new URLSearchParams();
             params.set('tabId', port.sender.tab.id.toString());
             params.set('id', message.id);
-            console.log(params.toString());
             popupCenter({
               url: `/popup-center.html#${RouteUrls.AccountRequest}?${params.toString()}`,
             });
-
-            // chrome.tabs.sendMessage(port.sender.tab.id, {
-            //   source: MESSAGE_SOURCE,
-            //   id: message.id,
-            //   results: { publicKey: 'sldkfjs' },
-            // });
             break;
           }
         }
diff --git a/src/background/legacy-external-message-handler.ts b/src/background/legacy-external-message-handler.ts
index dfbcfa1c962..77149b20932 100644
--- a/src/background/legacy-external-message-handler.ts
+++ b/src/background/legacy-external-message-handler.ts
@@ -17,9 +17,8 @@ async function openRequestInFullPage(path: string, urlParams: URLSearchParams) {
 export function inferLegacyMessage(message: any): message is LegacyMessageFromContentScript {
   // Now that we use a RPC communication style, we can infer
   // legacy message types by presence of an id
-  // Types incorrectly state this is `undefined`
-  // @ts-ignore
-  return !Object.hasOwn(message, 'id');
+  const hasIdProp = 'id' in message;
+  return !hasIdProp;
 }
 
 export async function handleLegacyExternalMethodFormat(
diff --git a/src/inpage/inpage.ts b/src/inpage/inpage.ts
index 0cd0d25a5eb..0c1275ee992 100644
--- a/src/inpage/inpage.ts
+++ b/src/inpage/inpage.ts
@@ -10,10 +10,18 @@ import {
   LegacyMessageToContentScript,
   MESSAGE_SOURCE,
   RpcMethodNames,
+  RpcRequestArgs,
+  RpcResponseArgs,
   TransactionResponseMessage,
 } from '@shared/message-types';
 import { logger } from '@shared/logger';
 
+declare global {
+  interface Crypto {
+    randomUUID: () => string;
+  }
+}
+
 type CallableMethods = keyof typeof ExternalMethods;
 
 interface ExtensionResponse {
@@ -109,19 +117,17 @@ const provider: StacksProvider = {
     });
   },
 
-  async request(method: RpcMethodNames, params?: any[]) {
+  async request(method: RpcMethodNames, params?: any[]): Promise<RpcResponseArgs> {
     return new Promise((resolve, _reject) => {
       const id = crypto.randomUUID();
-      const event = new CustomEvent<RpcEventArgs>(DomEventName.rpcRequest, {
+      const event = new CustomEvent<RpcRequestArgs>(DomEventName.rpcRequest, {
         detail: { jsonrpc: '2.0', id, method, params },
       });
       document.dispatchEvent(event);
       const handleMessage = (event: MessageEvent<any>) => {
-        console.log(event);
         if (event.data.id !== id) return;
-
         window.removeEventListener('message', handleMessage);
-        resolve(event.data.result);
+        resolve(event.data);
       };
       window.addEventListener('message', handleMessage);
     });
@@ -137,28 +143,6 @@ const provider: StacksProvider = {
       },
     };
   },
-} as StacksProvider & { request(): Promise<void> };
+} as StacksProvider & { request(): Promise<RpcResponseArgs> };
 
 window.StacksProvider = provider;
-
-interface RpcRequestArgs {
-  method: RpcMethodNames;
-  params?: any[];
-}
-
-interface RpcEventArgs extends RpcRequestArgs {
-  jsonrpc: '2.0';
-  id: string;
-}
-
-declare global {
-  interface Crypto {
-    randomUUID: () => string;
-  }
-}
-
-// declare global {
-//   interface Window {
-//     StacksProvider?: Provider;
-//   }
-// }
diff --git a/src/shared/message-types.ts b/src/shared/message-types.ts
index 6aee0dcb29d..a81f65d87ef 100644
--- a/src/shared/message-types.ts
+++ b/src/shared/message-types.ts
@@ -36,6 +36,28 @@ export interface Message<Methods extends ExtensionMethods, Payload = undefined>
 
 //
 // RPC Methods, SIP pending
+interface RpcBaseArgs {
+  jsonrpc: '2.0';
+  id: string;
+}
+
+export interface RpcRequestArgs extends RpcBaseArgs {
+  method: RpcMethodNames;
+  params?: any[];
+}
+
+interface RpcSuccessResponseArgs extends RpcBaseArgs {
+  results: any;
+}
+
+interface RpcErrorResponseArgs extends RpcBaseArgs {
+  error: {
+    code: number;
+    message: string;
+  };
+}
+
+export type RpcResponseArgs = RpcSuccessResponseArgs | RpcErrorResponseArgs;
 
 export enum RpcMethods {
   stx_requestAccounts,
@@ -55,18 +77,6 @@ type TestAction = RpcMessage<'stx_testAnotherMethod'>;
 
 export type SupportedRpcMessages = RequestAccounts | TestAction;
 
-// interface SupportedMessagesReturnTypeMap {
-//   [RpcMethods.stx_requestAccounts]: { xxx: string };
-//   [RpcMethods.stx_testAnotherMethod]: { yyy: string };
-// }
-
-// function xx<Method extends keyof SupportedMessagesReturnTypeMap >(): // method: RpcMethods
-// SupportedMessagesReturnTypeMap[Method] {
-
-// }
-
-// xx('stx_requestAccounts');
-
 //
 // Deprecated methods
 type AuthenticationRequestMessage = Message<ExternalMethods.authenticationRequest, string>;
diff --git a/src/shared/messages.ts b/src/shared/messages.ts
index d659855bdcd..782a35666d1 100644
--- a/src/shared/messages.ts
+++ b/src/shared/messages.ts
@@ -33,5 +33,5 @@ export function sendMessageToBackground(message: BackgroundActions) {
 }
 
 export function sendMessageToTab(tabId: number, id: string, message: object) {
-  return chrome.tabs.sendMessage(tabId, { source: MESSAGE_SOURCE, id, result: message });
+  return chrome.tabs.sendMessage(tabId, { source: MESSAGE_SOURCE, id, ...message });
 }