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
@@ -1,5 +1,6 @@
 // @flow
 
+import t, { type TInterface } from 'tcomb';
 import uuid from 'uuid';
 
 import { farcasterChannelTagBlobHash } from 'lib/shared/community-utils.js';
@@ -14,6 +15,7 @@
 import { threadPermissions } from 'lib/types/thread-permission-types.js';
 import type { BlobOperationResult } from 'lib/utils/blob-service.js';
 import { ServerError } from 'lib/utils/errors.js';
+import { tShape } from 'lib/utils/validation-utils.js';
 
 import {
   dbQuery,
@@ -207,6 +209,19 @@
   return download(hash);
 }
 
+const farcasterChannelTagBlobValidator: TInterface<FarcasterChannelTagBlob> =
+  tShape<FarcasterChannelTagBlob>({
+    commCommunityID: t.String,
+    farcasterChannelID: t.String,
+    keyserverURL: t.String,
+  });
+
+type FarcasterChannelTagBlob = {
+  +commCommunityID: string,
+  +farcasterChannelID: string,
+  +keyserverURL: string,
+};
+
 async function uploadFarcasterChannelTagBlob(
   commCommunityID: string,
   farcasterChannelID: string,
@@ -215,7 +230,7 @@
   const { baseDomain, basePath } = getAndAssertKeyserverURLFacts();
   const keyserverURL = baseDomain + basePath;
 
-  const payload = {
+  const payload: FarcasterChannelTagBlob = {
     commCommunityID,
     farcasterChannelID,
     keyserverURL,
@@ -234,4 +249,9 @@
   return await assignHolder({ holder, hash });
 }
 
-export { createOrUpdateFarcasterChannelTag, uploadFarcasterChannelTagBlob };
+export {
+  createOrUpdateFarcasterChannelTag,
+  uploadFarcasterChannelTagBlob,
+  getFarcasterChannelTagBlob,
+  farcasterChannelTagBlobValidator,
+};