diff --git a/keyserver/src/endpoints.js b/keyserver/src/endpoints.js
--- a/keyserver/src/endpoints.js
+++ b/keyserver/src/endpoints.js
@@ -7,6 +7,7 @@
 import type { PolicyType } from 'lib/facts/policies.js';
 import type { Endpoint } from 'lib/types/endpoints.js';
 import { calendarQueryValidator } from 'lib/types/entry-types.js';
+import { recreateNotifsOlmSessionRequestValidator } from 'lib/types/keyserver-types.js';
 import { sessionStateValidator } from 'lib/types/session-types.js';
 import { endpointValidators } from 'lib/types/validators/endpoint-validators.js';
 import { updateUserAvatarRequestValidator } from 'lib/utils/avatar-utils.js';
@@ -45,7 +46,10 @@
 } from './responders/farcaster-channel-tag-responders.js';
 import type { JSONResponder } from './responders/handlers.js';
 import { createJSONResponder } from './responders/handlers.js';
-import { getOlmSessionInitializationDataResponder } from './responders/keys-responders.js';
+import {
+  getOlmSessionInitializationDataResponder,
+  recreateNotifsOlmSessionResponder,
+} from './responders/keys-responders.js';
 import {
   createOrUpdatePublicLinkResponder,
   disableInviteLinkResponder,
@@ -486,6 +490,11 @@
     inputValidator: ignoredArgumentValidator,
     policies: [],
   },
+  recreate_notifs_olm_session: {
+    responder: recreateNotifsOlmSessionResponder,
+    inputValidator: recreateNotifsOlmSessionRequestValidator,
+    policies: [],
+  },
   version: {
     responder: versionResponder,
     inputValidator: ignoredArgumentValidator,
diff --git a/keyserver/src/responders/keys-responders.js b/keyserver/src/responders/keys-responders.js
--- a/keyserver/src/responders/keys-responders.js
+++ b/keyserver/src/responders/keys-responders.js
@@ -2,12 +2,15 @@
 
 import type { Account as OlmAccount } from '@commapp/olm';
 
+import { type RecreateNotifsOlmSessionRequest } from 'lib/types/keyserver-types.js';
 import type {
   OlmSessionInitializationInfo,
   GetOlmSessionInitializationDataResponse,
 } from 'lib/types/request-types.js';
 import { ServerError } from 'lib/utils/errors.js';
 
+import { createAndPersistOlmSession } from '../creators/olm-session-creator.js';
+import type { Viewer } from '../session/viewer.js';
 import { fetchCallUpdateOlmAccount } from '../updaters/olm-account-updater.js';
 
 type SessionInitializationKeysSet = {
@@ -96,4 +99,25 @@
   };
 }
 
-export { getOlmSessionInitializationDataResponder };
+async function recreateNotifsOlmSessionResponder(
+  viewer: Viewer,
+  request: RecreateNotifsOlmSessionRequest,
+): Promise<void> {
+  const {
+    initialEncryptedMessage,
+    identityKeysBlob: {
+      notificationIdentityPublicKeys: { curve25519 },
+    },
+  } = request;
+  await createAndPersistOlmSession(
+    initialEncryptedMessage,
+    'notifications',
+    viewer.cookieID,
+    curve25519,
+  );
+}
+
+export {
+  getOlmSessionInitializationDataResponder,
+  recreateNotifsOlmSessionResponder,
+};
diff --git a/lib/actions/keyserver-actions.js b/lib/actions/keyserver-actions.js
--- a/lib/actions/keyserver-actions.js
+++ b/lib/actions/keyserver-actions.js
@@ -1,7 +1,39 @@
 // @flow
 
+import { useKeyserverCall } from '../keyserver-conn/keyserver-call.js';
+import type { CallKeyserverEndpoint } from '../keyserver-conn/keyserver-conn-types.js';
+import type { RecreateNotifsOlmSessionRequest } from '../types/keyserver-types.js';
+
 const addKeyserverActionType = 'ADD_KEYSERVER';
 
 const removeKeyserverActionType = 'REMOVE_KEYSERVER';
 
-export { addKeyserverActionType, removeKeyserverActionType };
+const recreateNotifsOlmSession =
+  (
+    callKeyserverEndpoint: CallKeyserverEndpoint,
+  ): ((
+    input: $ReadOnly<{
+      ...RecreateNotifsOlmSessionRequest,
+      keyserverID: string,
+    }>,
+  ) => Promise<void>) =>
+  async input => {
+    const { keyserverID, ...request } = input;
+    const requests = { [keyserverID]: request };
+    await callKeyserverEndpoint('recreate_notifs_olm_session', requests);
+  };
+
+function useRecreateNotifsOlmSession(): (
+  input: $ReadOnly<{
+    ...RecreateNotifsOlmSessionRequest,
+    keyserverID: string,
+  }>,
+) => Promise<void> {
+  return useKeyserverCall(recreateNotifsOlmSession);
+}
+
+export {
+  addKeyserverActionType,
+  removeKeyserverActionType,
+  useRecreateNotifsOlmSession,
+};
diff --git a/lib/types/endpoints.js b/lib/types/endpoints.js
--- a/lib/types/endpoints.js
+++ b/lib/types/endpoints.js
@@ -111,6 +111,7 @@
   UPLOAD_MEDIA_METADATA: 'upload_media_metadata',
   SEARCH_MESSAGES: 'search_messages',
   GET_OLM_SESSION_INITIALIZATION_DATA: 'get_olm_session_initialization_data',
+  RECREATE_NOTIFS_OLM_SESSION: 'recreate_notifs_olm_session',
   VERSION: 'version',
   FETCH_COMMUNITY_INFOS: 'fetch_community_infos',
   CREATE_OR_UPDATE_FARCASTER_CHANNEL_TAG:
diff --git a/lib/types/keyserver-types.js b/lib/types/keyserver-types.js
--- a/lib/types/keyserver-types.js
+++ b/lib/types/keyserver-types.js
@@ -2,6 +2,10 @@
 
 import t, { type TInterface } from 'tcomb';
 
+import {
+  type IdentityKeysBlob,
+  identityKeysBlobValidator,
+} from './crypto-types.js';
 import type { Platform, PlatformDetails } from './device-types.js';
 import {
   calendarQueryValidator,
@@ -84,4 +88,15 @@
     keyserverInfos: t.dict(t.String, keyserverInfoValidator),
   });
 
+export type RecreateNotifsOlmSessionRequest = {
+  +initialEncryptedMessage: string,
+  +identityKeysBlob: IdentityKeysBlob,
+};
+
+export const recreateNotifsOlmSessionRequestValidator: TInterface<RecreateNotifsOlmSessionRequest> =
+  tShape<RecreateNotifsOlmSessionRequest>({
+    initialEncryptedMessage: t.String,
+    identityKeysBlob: identityKeysBlobValidator,
+  });
+
 export { defaultKeyserverInfo };
diff --git a/lib/types/validators/endpoint-validators.js b/lib/types/validators/endpoint-validators.js
--- a/lib/types/validators/endpoint-validators.js
+++ b/lib/types/validators/endpoint-validators.js
@@ -172,6 +172,7 @@
   get_olm_session_initialization_data: {
     validator: getOlmSessionInitializationDataResponseValidator,
   },
+  recreate_notifs_olm_session: { validator: t.Nil },
   version: { validator: versionResponseValidator },
   fetch_community_infos: { validator: fetchCommunityInfosResponseValidator },
   create_or_update_farcaster_channel_tag: {