diff --git a/keyserver/src/creators/farcaster-channel-tag-creator.js b/keyserver/src/creators/farcaster-channel-tag-creator.js
--- a/keyserver/src/creators/farcaster-channel-tag-creator.js
+++ b/keyserver/src/creators/farcaster-channel-tag-creator.js
@@ -36,16 +36,12 @@
     throw new ServerError('internal_error');
   }
 
-  const [serverCommunityInfos, blobDownload] = await Promise.all([
-    fetchCommunityInfos(viewer),
+  const [communityInfos, blobDownload] = await Promise.all([
+    fetchCommunityInfos(viewer, [request.commCommunityID]),
     getFarcasterChannelTagBlob(request.farcasterChannelID),
   ]);
 
-  const communityInfo = serverCommunityInfos.find(
-    community => community.id === request.commCommunityID,
-  );
-
-  if (!communityInfo) {
+  if (communityInfos.length !== 1) {
     throw new ServerError('invalid_parameters');
   }
 
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
@@ -12,6 +12,7 @@
 
 async function fetchCommunityInfos(
   viewer: Viewer,
+  communityIDs?: $ReadOnlyArray<string>,
 ): Promise<$ReadOnlyArray<ServerCommunityInfoWithHolder>> {
   if (!viewer.loggedIn) {
     return [];
@@ -26,6 +27,12 @@
     WHERE m.role > 0
   `;
 
+  if (communityIDs && communityIDs.length > 0) {
+    query.append(SQL`
+      AND c.id IN (${communityIDs})
+    `);
+  }
+
   const [result] = await dbQuery(query);
 
   const communityInfos = result.map(row => ({