diff --git a/web/app.react.js b/web/app.react.js
index 824baad3e..dbf5580da 100644
--- a/web/app.react.js
+++ b/web/app.react.js
@@ -1,348 +1,350 @@
 // @flow
 
 import 'basscss/css/basscss.min.css';
 import './theme.css';
 import { config as faConfig } from '@fortawesome/fontawesome-svg-core';
 import classnames from 'classnames';
 import _isEqual from 'lodash/fp/isEqual.js';
 import * as React from 'react';
 import { DndProvider } from 'react-dnd';
 import { HTML5Backend } from 'react-dnd-html5-backend';
 import { useDispatch } from 'react-redux';
 import { WagmiConfig } from 'wagmi';
 
 import {
   fetchEntriesActionTypes,
   updateCalendarQueryActionTypes,
 } from 'lib/actions/entry-actions.js';
 import {
   ModalProvider,
   useModalContext,
 } from 'lib/components/modal-provider.react.js';
 import {
   createLoadingStatusSelector,
   combineLoadingStatuses,
 } from 'lib/selectors/loading-selectors.js';
 import { isLoggedIn } from 'lib/selectors/user-selectors.js';
 import type { LoadingStatus } from 'lib/types/loading-types.js';
 import type { Dispatch } from 'lib/types/redux-types.js';
 import { registerConfig } from 'lib/utils/config.js';
 import { WagmiENSCacheProvider, wagmiClient } from 'lib/utils/wagmi-utils.js';
 
 import Calendar from './calendar/calendar.react.js';
 import Chat from './chat/chat.react.js';
 import { EditModalProvider } from './chat/edit-message-provider.js';
 import { TooltipProvider } from './chat/tooltip-provider.js';
 import NavigationArrows from './components/navigation-arrows.react.js';
 import { initOpaque } from './crypto/opaque-utils.js';
 import electron from './electron.js';
 import InputStateContainer from './input/input-state-container.react.js';
+import InviteLinkHandler from './invite-links/invite-link-handler.react.js';
 import LoadingIndicator from './loading-indicator.react.js';
 import { MenuProvider } from './menu-provider.react.js';
 import UpdateModalHandler from './modals/update-modal.react.js';
 import SettingsSwitcher from './navigation-panels/settings-switcher.react.js';
 import Topbar from './navigation-panels/topbar.react.js';
 import useBadgeHandler from './push-notif/badge-handler.react.js';
 import { PushNotificationsHandler } from './push-notif/push-notifs-handler.js';
 import { updateNavInfoActionType } from './redux/action-types.js';
 import DeviceIDUpdater from './redux/device-id-updater.js';
 import DisconnectedBarVisibilityHandler from './redux/disconnected-bar-visibility-handler.js';
 import DisconnectedBar from './redux/disconnected-bar.js';
 import FocusHandler from './redux/focus-handler.react.js';
 import PolicyAcknowledgmentHandler from './redux/policy-acknowledgment-handler.js';
 import { useSelector } from './redux/redux-utils.js';
 import VisibilityHandler from './redux/visibility-handler.react.js';
 import history from './router-history.js';
 import AccountSettings from './settings/account-settings.react.js';
 import DangerZone from './settings/danger-zone.react.js';
 import CommunityPicker from './sidebar/community-picker.react.js';
 import Splash from './splash/splash.react.js';
 import './typography.css';
 import css from './style.css';
 import { type NavInfo } from './types/nav-types.js';
 import { canonicalURLFromReduxState, navInfoFromURL } from './url-utils.js';
 
 initOpaque();
 
 // We want Webpack's css-loader and style-loader to handle the Fontawesome CSS,
 // so we disable the autoAddCss logic and import the CSS file. Otherwise every
 // icon flashes huge for a second before the CSS is loaded.
 import '@fortawesome/fontawesome-svg-core/styles.css';
 faConfig.autoAddCss = false;
 
 registerConfig({
   // We can't securely cache credentials on web, so we have no way to recover
   // from a cookie invalidation
   resolveInvalidatedCookie: null,
   // We use httponly cookies on web to protect against XSS attacks, so we have
   // no access to the cookies from JavaScript
   setCookieOnRequest: false,
   setSessionIDOnRequest: true,
   // Never reset the calendar range
   calendarRangeInactivityLimit: null,
   platformDetails: { platform: electron?.platform ?? 'web' },
 });
 
 type BaseProps = {
   +location: {
     +pathname: string,
     ...
   },
 };
 type Props = {
   ...BaseProps,
   // Redux state
   +navInfo: NavInfo,
   +entriesLoadingStatus: LoadingStatus,
   +loggedIn: boolean,
   +activeThreadCurrentlyUnread: boolean,
   // Redux dispatch functions
   +dispatch: Dispatch,
   +modals: $ReadOnlyArray<React.Node>,
 };
 class App extends React.PureComponent<Props> {
   componentDidMount() {
     const {
       navInfo,
       location: { pathname },
       loggedIn,
     } = this.props;
     const newURL = canonicalURLFromReduxState(navInfo, pathname, loggedIn);
     if (pathname !== newURL) {
       history.replace(newURL);
     }
   }
 
   componentDidUpdate(prevProps: Props) {
     const {
       navInfo,
       location: { pathname },
       loggedIn,
     } = this.props;
     if (!_isEqual(navInfo)(prevProps.navInfo)) {
       const newURL = canonicalURLFromReduxState(navInfo, pathname, loggedIn);
       if (newURL !== pathname) {
         history.push(newURL);
       }
     } else if (pathname !== prevProps.location.pathname) {
       const newNavInfo = navInfoFromURL(pathname, { navInfo });
       if (!_isEqual(newNavInfo)(navInfo)) {
         this.props.dispatch({
           type: updateNavInfoActionType,
           payload: newNavInfo,
         });
       }
     } else if (loggedIn !== prevProps.loggedIn) {
       const newURL = canonicalURLFromReduxState(navInfo, pathname, loggedIn);
       if (newURL !== pathname) {
         history.replace(newURL);
       }
     }
     if (loggedIn !== prevProps.loggedIn) {
       electron?.clearHistory();
     }
   }
 
   onWordmarkClicked = () => {
     this.props.dispatch({
       type: updateNavInfoActionType,
       payload: { tab: 'chat' },
     });
   };
 
   render() {
     let content;
     if (this.props.loggedIn) {
       content = this.renderMainContent();
     } else {
       content = <Splash />;
     }
     return (
       <DndProvider backend={HTML5Backend}>
         <EditModalProvider>
           <TooltipProvider>
             <MenuProvider>
               <WagmiConfig client={wagmiClient}>
                 <WagmiENSCacheProvider>
                   <FocusHandler />
                   <VisibilityHandler />
                   <DeviceIDUpdater />
                   <PolicyAcknowledgmentHandler />
                   <PushNotificationsHandler />
+                  <InviteLinkHandler />
                   {content}
                   {this.props.modals}
                 </WagmiENSCacheProvider>
               </WagmiConfig>
             </MenuProvider>
           </TooltipProvider>
         </EditModalProvider>
       </DndProvider>
     );
   }
 
   onHeaderDoubleClick = () => electron?.doubleClickTopBar();
   stopDoubleClickPropagation = electron ? e => e.stopPropagation() : null;
 
   renderMainContent() {
     const mainContent = this.getMainContentWithSwitcher();
 
     let navigationArrows = null;
     if (electron) {
       navigationArrows = <NavigationArrows />;
     }
 
     const headerClasses = classnames({
       [css.header]: true,
       [css['electron-draggable']]: electron,
     });
 
     const wordmarkClasses = classnames({
       [css.wordmark]: true,
       [css['electron-non-draggable']]: electron,
     });
 
     return (
       <div className={css.layout}>
         <DisconnectedBarVisibilityHandler />
         <DisconnectedBar />
         <UpdateModalHandler />
         <header
           className={headerClasses}
           onDoubleClick={this.onHeaderDoubleClick}
         >
           <div className={css['main-header']}>
             <h1 className={wordmarkClasses}>
               <a
                 title="Comm Home"
                 aria-label="Go to Comm Home"
                 onClick={this.onWordmarkClicked}
                 onDoubleClick={this.stopDoubleClickPropagation}
               >
                 Comm
               </a>
             </h1>
             {navigationArrows}
             <div className={css['upper-right']}>
               <LoadingIndicator
                 status={this.props.entriesLoadingStatus}
                 size="medium"
                 loadingClassName={css['page-loading']}
                 errorClassName={css['page-error']}
               />
             </div>
           </div>
         </header>
         <InputStateContainer>{mainContent}</InputStateContainer>
         <div className={css.sidebar}>
           <CommunityPicker />
         </div>
       </div>
     );
   }
 
   getMainContentWithSwitcher() {
     const { tab, settingsSection } = this.props.navInfo;
     let mainContent;
 
     if (tab === 'settings') {
       if (settingsSection === 'account') {
         mainContent = <AccountSettings />;
       } else if (settingsSection === 'danger-zone') {
         mainContent = <DangerZone />;
       }
       return (
         <div className={css['main-content-container']}>
           <div className={css.switcher}>
             <SettingsSwitcher />
           </div>
           <div className={css['main-content']}>{mainContent}</div>
         </div>
       );
     }
 
     if (tab === 'calendar') {
       mainContent = <Calendar url={this.props.location.pathname} />;
     } else if (tab === 'chat') {
       mainContent = <Chat />;
     }
 
     const mainContentClass = classnames(
       css['main-content-container'],
       css['main-content-container-column'],
     );
     return (
       <div className={mainContentClass}>
         <Topbar />
         <div className={css['main-content']}>{mainContent}</div>
       </div>
     );
   }
 }
 
 const fetchEntriesLoadingStatusSelector = createLoadingStatusSelector(
   fetchEntriesActionTypes,
 );
 const updateCalendarQueryLoadingStatusSelector = createLoadingStatusSelector(
   updateCalendarQueryActionTypes,
 );
 
 const ConnectedApp: React.ComponentType<BaseProps> = React.memo<BaseProps>(
   function ConnectedApp(props) {
     const activeChatThreadID = useSelector(
       state => state.navInfo.activeChatThreadID,
     );
     const navInfo = useSelector(state => state.navInfo);
 
     const fetchEntriesLoadingStatus = useSelector(
       fetchEntriesLoadingStatusSelector,
     );
     const updateCalendarQueryLoadingStatus = useSelector(
       updateCalendarQueryLoadingStatusSelector,
     );
     const entriesLoadingStatus = combineLoadingStatuses(
       fetchEntriesLoadingStatus,
       updateCalendarQueryLoadingStatus,
     );
 
     const loggedIn = useSelector(isLoggedIn);
     const activeThreadCurrentlyUnread = useSelector(
       state =>
         !activeChatThreadID ||
         !!state.threadStore.threadInfos[activeChatThreadID]?.currentUser.unread,
     );
 
     useBadgeHandler();
 
     const dispatch = useDispatch();
     const modalContext = useModalContext();
     const modals = React.useMemo(
       () =>
         modalContext.modals.map(([modal, key]) => (
           <React.Fragment key={key}>{modal}</React.Fragment>
         )),
       [modalContext.modals],
     );
 
     return (
       <App
         {...props}
         navInfo={navInfo}
         entriesLoadingStatus={entriesLoadingStatus}
         loggedIn={loggedIn}
         activeThreadCurrentlyUnread={activeThreadCurrentlyUnread}
         dispatch={dispatch}
         modals={modals}
       />
     );
   },
 );
 
 function AppWithProvider(props: BaseProps): React.Node {
   return (
     <ModalProvider>
       <ConnectedApp {...props} />
     </ModalProvider>
   );
 }
 
 export default AppWithProvider;
diff --git a/web/invite-links/invite-link-handler.react.js b/web/invite-links/invite-link-handler.react.js
new file mode 100644
index 000000000..80e0e6593
--- /dev/null
+++ b/web/invite-links/invite-link-handler.react.js
@@ -0,0 +1,63 @@
+// @flow
+
+import * as React from 'react';
+import { useDispatch } from 'react-redux';
+
+import {
+  verifyInviteLink,
+  verifyInviteLinkActionTypes,
+} from 'lib/actions/link-actions.js';
+import { useModalContext } from 'lib/components/modal-provider.react.js';
+import { isLoggedIn } from 'lib/selectors/user-selectors.js';
+import {
+  useDispatchActionPromise,
+  useServerCall,
+} from 'lib/utils/action-utils.js';
+
+import AcceptInviteModal from './accept-invite-modal.react.js';
+import { updateNavInfoActionType } from '../redux/action-types.js';
+import { useSelector } from '../redux/redux-utils.js';
+
+function InviteLinkHandler(): null {
+  const inviteSecret = useSelector(state => state.navInfo.inviteSecret);
+  const loggedIn = useSelector(isLoggedIn);
+
+  const dispatchActionPromise = useDispatchActionPromise();
+  const dispatch = useDispatch();
+  const validateLink = useServerCall(verifyInviteLink);
+  const { pushModal } = useModalContext();
+  React.useEffect(() => {
+    if (!inviteSecret || !loggedIn) {
+      return;
+    }
+    dispatch({
+      type: updateNavInfoActionType,
+      payload: { inviteSecret: null },
+    });
+    const validateLinkPromise = validateLink({ secret: inviteSecret });
+    dispatchActionPromise(verifyInviteLinkActionTypes, validateLinkPromise);
+    (async () => {
+      const result = await validateLinkPromise;
+      if (result.status === 'already_joined') {
+        return;
+      }
+      pushModal(
+        <AcceptInviteModal
+          verificationResponse={result}
+          inviteSecret={inviteSecret}
+        />,
+      );
+    })();
+  }, [
+    dispatch,
+    dispatchActionPromise,
+    inviteSecret,
+    loggedIn,
+    pushModal,
+    validateLink,
+  ]);
+
+  return null;
+}
+
+export default InviteLinkHandler;