diff --git a/keyserver/src/endpoints.js b/keyserver/src/endpoints.js
--- a/keyserver/src/endpoints.js
+++ b/keyserver/src/endpoints.js
@@ -15,6 +15,7 @@
   setThreadUnreadStatusValidator,
   updateActivityResponderInputValidator,
 } from './responders/activity-responders.js';
+import { fetchCommunityInfosResponder } from './responders/community-responders.js';
 import {
   deviceTokenUpdateResponder,
   deviceTokenUpdateRequestInputValidator,
@@ -482,6 +483,11 @@
     inputValidator: ignoredArgumentValidator,
     policies: [],
   },
+  fetch_community_infos: {
+    responder: fetchCommunityInfosResponder,
+    inputValidator: ignoredArgumentValidator,
+    policies: baseLegalPolicies,
+  },
   create_or_update_farcaster_channel_tag: {
     responder: createOrUpdateFarcasterChannelTagResponder,
     inputValidator: createOrUpdateFarcasterChannelTagInputValidator,
diff --git a/keyserver/src/fetchers/community-fetchers.js b/keyserver/src/fetchers/community-fetchers.js
--- a/keyserver/src/fetchers/community-fetchers.js
+++ b/keyserver/src/fetchers/community-fetchers.js
@@ -1,13 +1,12 @@
 // @flow
 
-import type { CommunityInfo } from 'lib/types/community-types.js';
+import type { ServerCommunityInfo } from 'lib/types/community-types.js';
 
 import { dbQuery, SQL } from '../database/database.js';
 import { Viewer } from '../session/viewer.js';
 
 type ServerCommunityInfoWithHolder = $ReadOnly<{
-  ...CommunityInfo,
-  +id: string,
+  ...ServerCommunityInfo,
   +blobHolder: ?string,
 }>;
 
diff --git a/keyserver/src/responders/community-responders.js b/keyserver/src/responders/community-responders.js
new file mode 100644
--- /dev/null
+++ b/keyserver/src/responders/community-responders.js
@@ -0,0 +1,21 @@
+// @flow
+
+import type { FetchCommunityInfosResponse } from 'lib/types/community-types.js';
+
+import { fetchCommunityInfos } from '../fetchers/community-fetchers.js';
+import { Viewer } from '../session/viewer.js';
+
+async function fetchCommunityInfosResponder(
+  viewer: Viewer,
+): Promise<FetchCommunityInfosResponse> {
+  const fetchedCommunities = await fetchCommunityInfos(viewer);
+
+  const communityInfos = fetchedCommunities.map(community => ({
+    id: community.id,
+    farcasterChannelID: community.farcasterChannelID,
+  }));
+
+  return { communityInfos };
+}
+
+export { fetchCommunityInfosResponder };
diff --git a/lib/types/community-types.js b/lib/types/community-types.js
--- a/lib/types/community-types.js
+++ b/lib/types/community-types.js
@@ -1,5 +1,9 @@
 // @flow
 
+import t, { type TInterface } from 'tcomb';
+
+import { tID, tShape } from '../utils/validation-utils.js';
+
 export type CommunityInfo = {
   +farcasterChannelID: ?string,
 };
@@ -15,6 +19,21 @@
   +newCommunityInfo: CommunityInfo,
 };
 
+export type ServerCommunityInfo = {
+  +id: string,
+  +farcasterChannelID: ?string,
+};
+
+export const serverCommunityInfoValidator: TInterface<ServerCommunityInfo> =
+  tShape<ServerCommunityInfo>({
+    id: tID,
+    farcasterChannelID: t.maybe(t.String),
+  });
+
+export type FetchCommunityInfosResponse = {
+  +communityInfos: $ReadOnlyArray<ServerCommunityInfo>,
+};
+
 export type CreateOrUpdateFarcasterChannelTagRequest = {
   +commCommunityID: string,
   +farcasterChannelID: string,
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 @@
   SEARCH_MESSAGES: 'search_messages',
   GET_OLM_SESSION_INITIALIZATION_DATA: 'get_olm_session_initialization_data',
   VERSION: 'version',
+  FETCH_COMMUNITY_INFOS: 'fetch_community_infos',
   CREATE_OR_UPDATE_FARCASTER_CHANNEL_TAG:
     'create_or_update_farcaster_channel_tag',
   DELETE_FARCASTER_CHANNEL_TAG: 'delete_farcaster_channel_tag',
diff --git a/lib/types/validators/community-validators.js b/lib/types/validators/community-validators.js
new file mode 100644
--- /dev/null
+++ b/lib/types/validators/community-validators.js
@@ -0,0 +1,16 @@
+// @flow
+
+import t, { type TInterface } from 'tcomb';
+
+import { tShape } from '../../utils/validation-utils.js';
+import {
+  serverCommunityInfoValidator,
+  type FetchCommunityInfosResponse,
+} from '../community-types.js';
+
+const fetchCommunityInfosResponseValidator: TInterface<FetchCommunityInfosResponse> =
+  tShape({
+    communityInfos: t.list(serverCommunityInfoValidator),
+  });
+
+export { fetchCommunityInfosResponseValidator };
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
@@ -2,6 +2,7 @@
 
 import t from 'tcomb';
 
+import { fetchCommunityInfosResponseValidator } from './community-validators.js';
 import {
   saveEntryResponseValidator,
   deltaEntryInfosResultValidator,
@@ -168,6 +169,7 @@
     validator: getOlmSessionInitializationDataResponseValidator,
   },
   version: { validator: versionResponseValidator },
+  fetch_community_infos: { validator: fetchCommunityInfosResponseValidator },
   create_or_update_farcaster_channel_tag: {
     validator: createOrUpdateFarcasterChannelTagResponseValidator,
   },