diff --git a/src/lib/api/feed/custom.ts b/src/lib/api/feed/custom.ts
index 497d700..63fcbac 100644
--- a/src/lib/api/feed/custom.ts
+++ b/src/lib/api/feed/custom.ts
@@ -53,29 +53,18 @@ export class CustomFeedAPI implements FeedAPI {
     limit: number
   }): Promise<FeedAPIResponse> {
     // Microcosm batch path: Slingshot proxies the feed generator's skeleton and
-    // fetches all post records in one request. For personalized feeds we forward
-    // a service-auth token (aud = the feed generator's DID) so the generator can
-    // identify the viewer, exactly as the AppView would.
+    // fetches all post records in one request. We request the PUBLIC skeleton
+    // (no auth): Slingshot's batch proxy can't forward a service-auth token (it
+    // returns 400 for any `authorization` value), so we don't send one. Most
+    // feeds (Discover, what's-hot, etc.) have a usable public skeleton even for
+    // logged-in users. Truly personalized feeds return little/nothing here and
+    // fall through to the AppView below, which forwards the viewer's auth.
     if (MICROCOSM_ENABLED) {
       try {
         const page = await buildCustomFeed(this.params.feed, {
           viewerDid: this.agent.did,
           limit,
           cursor,
-          getAuthorization: this.agent.did
-            ? async (feedGenDid: string) => {
-                try {
-                  const {data} =
-                    await this.agent.com.atproto.server.getServiceAuth({
-                      aud: feedGenDid,
-                      lxm: 'app.bsky.feed.getFeedSkeleton',
-                    })
-                  return data.token
-                } catch {
-                  return undefined
-                }
-              }
-            : undefined,
         })
         if (page.feed.length) {
           return {cursor: page.cursor, feed: page.feed}