diff --git a/README.md b/README.md
index 198d121..f945db3 100644
--- a/README.md
+++ b/README.md
@@ -137,6 +137,7 @@ LLMCHAT__MCP_SERVERS同样为一个dict，key为服务器名称，value配置的
 | arg | 否 | [] | stdio服务器MCP命令参数 |
 | env | 否 | {} | stdio服务器环境变量 |
 | url | sse服务器必填 | 无 | sse服务器地址 |
+| headers | 否 | {} | sse模式下http请求头，用于认证或其他设置 |
 
 以下为在 Claude.app 的MCP服务器配置基础上增加的字段
 | 配置项 | 必填 | 默认值 | 说明 |
@@ -179,7 +180,10 @@ LLMCHAT__MCP_SERVERS同样为一个dict，key为服务器名称，value配置的
         "AISearch": {
             "friendly_name": "百度搜索",
             "additional_prompt": "遇到你不知道的问题或者时效性比较强的问题时，可以使用AISearch搜索，在使用AISearch时不要使用其他AI模型。",
-            "url": "http://appbuilder.baidu.com/v2/ai_search/mcp/sse?api_key=Bearer+<your-api-key>"
+            "url": "http://appbuilder.baidu.com/v2/ai_search/mcp/sse?api_key=Bearer+<your-api-key>",
+            "headers": {
+                "Authorization": "<some-api-key>"
+            }
         },
         "fetch": {
             "friendly_name": "网页浏览",
diff --git a/nonebot_plugin_llmchat/__init__.py b/nonebot_plugin_llmchat/__init__.py
index e89e485..79290a1 100755
--- a/nonebot_plugin_llmchat/__init__.py
+++ b/nonebot_plugin_llmchat/__init__.py
@@ -278,6 +278,8 @@ async def process_messages(group_id: int):
     while not state.queue.empty():
         event = await state.queue.get()
         logger.debug(f"从队列获取消息 群号：{group_id} 消息ID：{event.message_id}")
+        past_events_snapshot = []
+        mcp_client = MCPClient(plugin_config.mcp_servers)
         try:
             systemPrompt = f"""
 我想要你帮我在群聊中闲聊，大家一般叫你{"、".join(list(driver.config.nickname))}，我将会在后面的信息中告诉你每条群聊信息的发送者和发送时间，你可以直接称呼发送者为他对应的昵称。
@@ -320,6 +322,7 @@ async def process_messages(group_id: int):
 
             # 将机器人错过的消息推送给LLM
             past_events_snapshot = list(state.past_events)
+            state.past_events.clear()
             for ev in past_events_snapshot:
                 text_content = format_message(ev)
                 content.append({"type": "text", "text": text_content})
@@ -345,7 +348,6 @@ async def process_messages(group_id: int):
                 "timeout": 60,
             }
 
-            mcp_client = MCPClient(plugin_config.mcp_servers)
             if preset.support_mcp:
                 await mcp_client.connect_to_servers()
                 available_tools = await mcp_client.get_available_tools()
@@ -397,8 +399,6 @@ async def process_messages(group_id: int):
 
                 message = response.choices[0].message
 
-            await mcp_client.cleanup()
-
             reply, matched_reasoning_content = pop_reasoning_content(
                 response.choices[0].message.content
             )
@@ -423,7 +423,6 @@ async def process_messages(group_id: int):
             # 请求成功后再保存历史记录，保证user和assistant穿插，防止R1模型报错
             for message in new_messages:
                 state.history.append(message)
-            state.past_events.clear()
 
             if state.output_reasoning_content and reasoning_content:
                 try:
@@ -450,11 +449,13 @@ async def process_messages(group_id: int):
 
         except Exception as e:
             logger.opt(exception=e).error(f"API请求失败 群号：{group_id}")
+            # 如果在处理过程中出现异常，恢复未处理的消息到state中
+            state.past_events.extendleft(reversed(past_events_snapshot))
             await handler.send(Message(f"服务暂时不可用，请稍后再试\n{e!s}"))
         finally:
+            state.processing = False
             state.queue.task_done()
-
-    state.processing = False
+            await mcp_client.cleanup()
 
 
 # 预设切换命令
diff --git a/nonebot_plugin_llmchat/config.py b/nonebot_plugin_llmchat/config.py
index d658875..ed88dd2 100755
--- a/nonebot_plugin_llmchat/config.py
+++ b/nonebot_plugin_llmchat/config.py
@@ -20,6 +20,7 @@ class MCPServerConfig(BaseModel):
     args: list[str] | None = Field([], description="stdio模式下MCP命令参数")
     env: dict[str, str] | None = Field({}, description="stdio模式下MCP命令环境变量")
     url: str | None = Field(None, description="sse模式下MCP服务器地址")
+    headers: dict[str, str] | None = Field({}, description="sse模式下http请求头，用于认证或其他设置")
 
     # 额外字段
     friendly_name: str | None = Field(None, description="MCP服务器友好名称")
diff --git a/nonebot_plugin_llmchat/mcpclient.py b/nonebot_plugin_llmchat/mcpclient.py
index 55e1b44..c3f3224 100644
--- a/nonebot_plugin_llmchat/mcpclient.py
+++ b/nonebot_plugin_llmchat/mcpclient.py
@@ -22,7 +22,7 @@ class MCPClient:
         for server_name, config in self.server_config.items():
             logger.debug(f"正在连接服务器[{server_name}]")
             if config.url:
-                sse_transport = await self.exit_stack.enter_async_context(sse_client(url=config.url))
+                sse_transport = await self.exit_stack.enter_async_context(sse_client(url=config.url, headers=config.headers))
                 read, write = sse_transport
                 self.sessions[server_name] = await self.exit_stack.enter_async_context(ClientSession(read, write))
                 await self.sessions[server_name].initialize()
@@ -74,6 +74,7 @@ class MCPClient:
         return response.content
 
     def get_friendly_name(self, tool_name: str):
+        logger.debug(tool_name)
         server_name, real_tool_name = tool_name.split("___")
         return (self.server_config[server_name].friendly_name or server_name) + " - " + real_tool_name