diff --git a/backend/src/controllers/authController.ts b/backend/src/controllers/authController.ts
index 5fc95b7d..386148fe 100644
--- a/backend/src/controllers/authController.ts
+++ b/backend/src/controllers/authController.ts
@@ -319,6 +319,49 @@ export class AuthController {
     );
   }
 
+  /**
+   * GET /api/auth/session
+   * Returns the authenticated user's display identity and organization.
+   */
+  static async session(req: express.Request, res: express.Response) {
+    try {
+      const result = await query(
+        `SELECT
+           u.id,
+           u.email,
+           u.name,
+           u.wallet_address,
+           u.organization_id,
+           u.role,
+           o.name AS organization_name
+         FROM users u
+         LEFT JOIN organizations o ON o.id = u.organization_id
+         WHERE u.id = $1`,
+        [req.user!.id]
+      );
+
+      if (result.rows.length === 0) {
+        return res.status(404).json({ error: 'User not found' });
+      }
+
+      const user = result.rows[0];
+      return res.json({
+        user: {
+          id: user.id,
+          email: user.email ?? null,
+          name: user.name ?? null,
+          walletAddress: user.wallet_address ?? null,
+          organizationId: user.organization_id ?? null,
+          organizationName: user.organization_name ?? null,
+          role: user.role,
+        },
+      });
+    } catch (error) {
+      console.error('Session lookup failed:', error);
+      return res.status(500).json({ error: 'Internal server error' });
+    }
+  }
+
   /**
    * POST /api/auth/refresh
    * Refreshes access token using a valid refresh token.
diff --git a/backend/src/routes/authRoutes.ts b/backend/src/routes/authRoutes.ts
index 16f75526..1183d365 100644
--- a/backend/src/routes/authRoutes.ts
+++ b/backend/src/routes/authRoutes.ts
@@ -10,6 +10,7 @@ const router = Router();
 router.post('/login', AuthController.login);
 router.post('/register', AuthController.register);
 router.post('/refresh', AuthController.refresh);
+router.get('/session', authenticateJWT, AuthController.session);
 
 router.post(
   '/invitations',
diff --git a/frontend/src/components/AppNav.tsx b/frontend/src/components/AppNav.tsx
index ced8ef3b..b03e7017 100644
--- a/frontend/src/components/AppNav.tsx
+++ b/frontend/src/components/AppNav.tsx
@@ -13,18 +13,15 @@ import {
   X,
   BarChart2,
   TrendingUp,
+  LogOut,
 } from 'lucide-react';
 import { Avatar } from './Avatar';
+import { useAuth } from '../providers/AuthProvider';
 
 const AppNav: React.FC = () => {
   const [mobileOpen, setMobileOpen] = useState(false);
 
-  // Mock user data - replace with actual user context
-  const currentUser = {
-    email: 'user@example.com',
-    name: 'John Doe',
-    imageUrl: undefined,
-  };
+  const { user, loading, logout } = useAuth();
 
   const navLinks = (
     <>
@@ -202,6 +199,49 @@ const AppNav: React.FC = () => {
     </>
   );
 
+  const displayName = user?.name || user?.email || user?.walletAddress || '';
+  const displayDetail = user?.email || user?.walletAddress || '';
+
+  const renderUserProfile = (showDetails: boolean) =>
+    loading ? (
+      <div
+        aria-label="Loading account"
+        className="h-9 w-40 rounded-lg bg-(--surface-hi) animate-pulse"
+      />
+    ) : user ? (
+      <div className="flex items-center gap-2 min-w-0">
+        <div className="p-1 bg-(--surface-hi) rounded-lg flex items-center gap-2 min-w-0">
+          <Avatar
+            email={user.email || user.walletAddress || String(user.id)}
+            name={displayName}
+            size="sm"
+          />
+          <div
+            className={`${showDetails ? 'block' : 'hidden md:block'} flex-1 min-w-0`}
+          >
+            <p className="text-[10px] font-semibold text-(--text) truncate">{displayName}</p>
+            <p className="text-[10px] text-(--muted) truncate">{displayDetail}</p>
+          </div>
+        </div>
+        <button
+          type="button"
+          onClick={logout}
+          aria-label="Sign out"
+          title="Sign out"
+          className="p-2 rounded-lg text-(--muted) hover:text-(--text) hover:bg-(--surface-hi) transition"
+        >
+          <LogOut className="w-4 h-4" />
+        </button>
+      </div>
+    ) : (
+      <Link
+        to="/login"
+        className="px-3 py-1.5 rounded-lg text-[13px] font-semibold text-(--link) hover:text-(--accent) transition"
+      >
+        Sign in
+      </Link>
+    );
+
   return (
     <nav className="relative w-full">
       <div className="flex items-center justify-between gap-4 px-3 py-2">
@@ -220,20 +260,7 @@ const AppNav: React.FC = () => {
         </button>
 
         {/* User profile */}
-        <div className="ml-auto flex items-center gap-2">
-          <div className="p-1 bg-(--surface-hi) rounded-lg flex items-center gap-2">
-            <Avatar
-              email={currentUser.email}
-              name={currentUser.name}
-              imageUrl={currentUser.imageUrl}
-              size="sm"
-            />
-            <div className="hidden md:block flex-1 min-w-0">
-              <p className="text-[10px] font-semibold text-(--text) truncate">{currentUser.name}</p>
-              <p className="text-[10px] text-(--muted) truncate">{currentUser.email}</p>
-            </div>
-          </div>
-        </div>
+        <div className="ml-auto flex items-center gap-2">{renderUserProfile(false)}</div>
       </div>
 
       {/* Mobile dropdown menu */}
@@ -274,22 +301,7 @@ const AppNav: React.FC = () => {
               </div>
 
               {/* Mobile menu footer with user info */}
-              <div className="p-4 border-t border-(--border)">
-                <div className="flex items-center gap-3 p-3 bg-(--surface-hi) rounded-lg">
-                  <Avatar
-                    email={currentUser.email}
-                    name={currentUser.name}
-                    imageUrl={currentUser.imageUrl}
-                    size="sm"
-                  />
-                  <div className="flex-1 min-w-0">
-                    <p className="text-sm font-semibold text-(--text) truncate">
-                      {currentUser.name}
-                    </p>
-                    <p className="text-xs text-(--muted) truncate">{currentUser.email}</p>
-                  </div>
-                </div>
-              </div>
+              <div className="p-4 border-t border-(--border)">{renderUserProfile(true)}</div>
             </div>
           </div>
         </>
diff --git a/frontend/src/components/DashboardTopBar.tsx b/frontend/src/components/DashboardTopBar.tsx
index 617350d5..63e4dcb3 100644
--- a/frontend/src/components/DashboardTopBar.tsx
+++ b/frontend/src/components/DashboardTopBar.tsx
@@ -2,10 +2,10 @@ import React from 'react';
 import ThemeToggle from './ThemeToggle';
 import ConnectAccount from './ConnectAccount';
 import { Text } from '@stellar/design-system';
+import { useAuth } from '../providers/AuthProvider';
 
 export const DashboardTopBar: React.FC = () => {
-  // Mock org data
-  const orgName = 'FutureLabs Inc.';
+  const { user, loading } = useAuth();
   const balance = '1,250.45 USDC';
 
   return (
@@ -20,9 +20,16 @@ export const DashboardTopBar: React.FC = () => {
           >
             Organization
           </Text>
-          <Text as="span" size="sm" weight="bold" addlClassName="text-(--text)">
-            {orgName}
-          </Text>
+          {loading ? (
+            <span
+              aria-label="Loading organization"
+              className="mt-1 h-4 w-28 rounded bg-(--surface-hi) animate-pulse"
+            />
+          ) : (
+            <Text as="span" size="sm" weight="bold" addlClassName="text-(--text)">
+              {user?.organizationName ?? 'No organization'}
+            </Text>
+          )}
         </div>
 
         <div className="w-px h-6 bg-(--border) hidden lg:block" />
diff --git a/frontend/src/main.tsx b/frontend/src/main.tsx
index f84f1879..0a14c323 100644
--- a/frontend/src/main.tsx
+++ b/frontend/src/main.tsx
@@ -8,6 +8,7 @@ import { WalletProvider } from './providers/WalletProvider.tsx';
 import { NotificationProvider } from './providers/NotificationProvider.tsx';
 import { SocketProvider } from './providers/SocketProvider.tsx';
 import { ThemeProvider } from './providers/ThemeProvider.tsx';
+import { AuthProvider } from './providers/AuthProvider.tsx';
 import * as Sentry from '@sentry/react';
 import ErrorBoundary from './components/ErrorBoundary';
 import ErrorFallback from './components/ErrorFallback';
@@ -35,9 +36,11 @@ ReactDOM.createRoot(document.getElementById('root')!).render(
           <SocketProvider>
             <WalletProvider>
               <BrowserRouter>
-                <ErrorBoundary fallback={<ErrorFallback onReset={() => {}} />}>
-                  <App />
-                </ErrorBoundary>
+                <AuthProvider>
+                  <ErrorBoundary fallback={<ErrorFallback onReset={() => {}} />}>
+                    <App />
+                  </ErrorBoundary>
+                </AuthProvider>
               </BrowserRouter>
             </WalletProvider>
           </SocketProvider>
diff --git a/frontend/src/providers/AuthProvider.tsx b/frontend/src/providers/AuthProvider.tsx
new file mode 100644
index 00000000..3342a8df
--- /dev/null
+++ b/frontend/src/providers/AuthProvider.tsx
@@ -0,0 +1,108 @@
+import React, {
+  createContext,
+  useCallback,
+  useContext,
+  useEffect,
+  useState,
+} from 'react';
+import axios from 'axios';
+import { useLocation } from 'react-router-dom';
+import api from '../utils/api';
+
+export interface AuthUser {
+  id: number;
+  email: string | null;
+  name: string | null;
+  walletAddress: string | null;
+  organizationId: number | null;
+  organizationName: string | null;
+  role: string;
+}
+
+interface AuthContextValue {
+  user: AuthUser | null;
+  loading: boolean;
+  logout: () => void;
+}
+
+const AuthContext = createContext<AuthContextValue | undefined>(undefined);
+
+function storedToken() {
+  return localStorage.getItem('payd_auth_token');
+}
+
+export const AuthProvider: React.FC<React.PropsWithChildren> = ({ children }) => {
+  const location = useLocation();
+  const [token, setToken] = useState<string | null>(() => storedToken());
+  const [user, setUser] = useState<AuthUser | null>(null);
+  const [loading, setLoading] = useState(() => Boolean(storedToken()));
+
+  const loadSession = useCallback(async (currentToken: string | null) => {
+    if (!currentToken) {
+      setUser(null);
+      setLoading(false);
+      return;
+    }
+
+    setLoading(true);
+    try {
+      const response = await api.get<{ user: AuthUser }>('/auth/session');
+      setUser(response.data.user);
+    } catch (error) {
+      setUser(null);
+
+      if (
+        axios.isAxiosError(error) &&
+        (error.response?.status === 401 ||
+          error.response?.status === 403 ||
+          error.response?.status === 404)
+      ) {
+        localStorage.removeItem('payd_auth_token');
+        localStorage.removeItem('accessToken');
+        setToken(null);
+      }
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    const currentToken = storedToken();
+    if (currentToken !== token) {
+      setToken(currentToken);
+    }
+  }, [location.pathname, token]);
+
+  useEffect(() => {
+    void loadSession(token);
+  }, [loadSession, token]);
+
+  useEffect(() => {
+    const handleStorage = (event: StorageEvent) => {
+      if (event.key === 'payd_auth_token') {
+        setToken(event.newValue);
+      }
+    };
+
+    window.addEventListener('storage', handleStorage);
+    return () => window.removeEventListener('storage', handleStorage);
+  }, []);
+
+  const logout = useCallback(() => {
+    localStorage.removeItem('payd_auth_token');
+    localStorage.removeItem('accessToken');
+    setToken(null);
+    setUser(null);
+    window.location.assign('/login');
+  }, []);
+
+  return <AuthContext.Provider value={{ user, loading, logout }}>{children}</AuthContext.Provider>;
+};
+
+export function useAuth() {
+  const context = useContext(AuthContext);
+  if (!context) {
+    throw new Error('useAuth must be used within AuthProvider');
+  }
+  return context;
+}