diff --git a/api/project-backup/project/list.ts b/api/project-backup/project/list.ts
index e69de29..28021c8 100644
--- a/api/project-backup/project/list.ts
+++ b/api/project-backup/project/list.ts
@@ -0,0 +1,19 @@
+import type { UnixTime } from "../../../base.ts";
+
+/** The response type of /api/project-backup/:projectname/list */
+export interface BackupList {
+  /** backup list */
+  backups: BackupSummary[];
+}
+
+/** Backup summary */
+export interface BackupSummary {
+  /** backuped date */
+  backuped: UnixTime;
+  /** backup Id */
+  id: string;
+  /** total links in the backup */
+  totalLinks: number;
+  /** total pages in the backup */
+  totalPages: number;
+}