diff --git a/src/api/mail_routes.py b/src/api/mail_routes.py
index dddc62b..4de4038 100644
--- a/src/api/mail_routes.py
+++ b/src/api/mail_routes.py
@@ -100,6 +100,48 @@ async def list_mail(
     return {"mails": mails, "total": len(mails)}
 
 
+@router.get("/agents/list")
+async def list_mail_agents():
+    """列出参与过 Mail 的所有 Agent（用于筛选）"""
+    q = _q()
+    conn = q._conn()
+    try:
+        senders = conn.execute(
+            "SELECT DISTINCT assigned_by FROM tasks WHERE assigned_by IS NOT NULL"
+        ).fetchall()
+        receivers = conn.execute(
+            "SELECT DISTINCT assignee FROM tasks WHERE assignee IS NOT NULL"
+        ).fetchall()
+        agents = list(set(
+            [r["assigned_by"] for r in senders] +
+            [r["assignee"] for r in receivers]
+        ))
+        agents.sort()
+        return {"agents": agents}
+    finally:
+        conn.close()
+
+
+@router.get("/summary")
+async def mail_summary():
+    """Mail 摘要（未读数、总数）"""
+    bb = _bb()
+    all_tasks = bb.list_tasks()
+
+    total = len(all_tasks)
+    unread = 0
+    by_type: Dict[str, int] = {}
+
+    for t in all_tasks:
+        meta = _mail_meta(t)
+        if not meta.get("is_read", False):
+            unread += 1
+        mtype = meta.get("type", "inform")
+        by_type[mtype] = by_type.get(mtype, 0) + 1
+
+    return {"total": total, "unread": unread, "by_type": by_type}
+
+
 @router.get("/{mail_id}")
 async def get_mail(mail_id: str):
     """Mail 详情"""