diff --git a/lib/memos.ts b/lib/memos.ts
index adffe1b..cd7850a 100644
--- a/lib/memos.ts
+++ b/lib/memos.ts
@@ -17,7 +17,11 @@ export async function listMemos(baseUrl: string, token: string, rules: MemosSync
   const all: MemosMemo[] = []; let pageToken = "";
   const tags = rules.tags?.filter(Boolean) || []; const mode = rules.attachmentMode || "all";
   const quote = (value: string) => JSON.stringify(value); const filters = [rules.creator && `creator == ${quote(rules.creator)}`, `visibility == "PUBLIC"`, ...tags.map((tag) => `tags.exists(t, t == ${quote(tag)})`)].filter(Boolean).join(" && ");
-  do { const params = new URLSearchParams({ pageSize: "100" }); if (pageToken) params.set("pageToken", pageToken); if (filters) params.set("filter", filters); const res = await request(`${base(baseUrl)}/memos?${params}`, token); const data = await res.json(); all.push(...(data.memos || [])); pageToken = data.nextPageToken || ""; } while (pageToken);
+  let useServerFilter = Boolean(filters);
+  do { const params = new URLSearchParams({ pageSize: "100" }); if (pageToken) params.set("pageToken", pageToken); if (useServerFilter && filters) params.set("filter", filters); let data: any;
+    try { data = await (await request(`${base(baseUrl)}/memos?${params}`, token)).json(); }
+    catch (error) { if (!pageToken && useServerFilter && error instanceof Error && error.message.startsWith("Memos API 400")) { useServerFilter = false; continue; } throw error; }
+    all.push(...(data.memos || [])); pageToken = data.nextPageToken || ""; } while (pageToken);
   return all.filter((memo) => {
     if (memo.visibility !== "PUBLIC") return false;
     if (rules.creator && memo.creator !== rules.creator) return false;