diff --git a/api/main.py b/api/main.py
index 97f9229..9208576 100644
--- a/api/main.py
+++ b/api/main.py
@@ -17,7 +17,7 @@ EMOTICON_BASE_URL = '/emoticons'
 CUSTOM_PUBLIC_PATH = os.path.join(config.DATA_PATH, 'custom_public')
 
 
-class MainHandler(tornado.web.StaticFileHandler):
+class StaticHandler(tornado.web.StaticFileHandler):
     """为了使用Vue Router的history模式，把不存在的文件请求转发到index.html"""
     async def get(self, path, include_body=True):
         if path == '':
@@ -60,6 +60,11 @@ class ServiceDiscoveryHandler(api.base.ApiHandler):
         })
 
 
+class PingHandler(api.base.ApiHandler):
+    async def get(self):
+        self.set_status(204)
+
+
 class UploadEmoticonHandler(api.base.ApiHandler):
     async def post(self):
         cfg = config.get_config()
@@ -103,6 +108,7 @@ class NoCacheStaticFileHandler(tornado.web.StaticFileHandler):
 ROUTES = [
     (r'/api/server_info', ServerInfoHandler),
     (r'/api/endpoints', ServiceDiscoveryHandler),
+    (r'/api/ping', PingHandler),
     (r'/api/emoticon', UploadEmoticonHandler),
 ]
 # 通配的放在最后
@@ -110,5 +116,5 @@ LAST_ROUTES = [
     (rf'{EMOTICON_BASE_URL}/(.*)', tornado.web.StaticFileHandler, {'path': EMOTICON_UPLOAD_PATH}),
     # 这个目录不保证文件内容不会变，还是不用缓存了
     (r'/custom_public/(.*)', NoCacheStaticFileHandler, {'path': CUSTOM_PUBLIC_PATH}),
-    (r'/(.*)', MainHandler, {'path': config.WEB_ROOT}),
+    (r'/(.*)', StaticHandler, {'path': config.WEB_ROOT}),
 ]
diff --git a/frontend/src/api/base.js b/frontend/src/api/base.js
index c107fe2..3c6cb56 100644
--- a/frontend/src/api/base.js
+++ b/frontend/src/api/base.js
@@ -112,7 +112,7 @@ if (!process.env.BACKEND_DISCOVERY) {
 
     async function testEndpoint(baseUrl) {
       try {
-        let url = `${baseUrl}/api/server_info`
+        let url = `${baseUrl}/api/ping`
         await axios.get(url, { timeout: 3 * 1000 })
         sortedBaseUrls.push(baseUrl)
       } catch {
diff --git a/utils/request.py b/utils/request.py
index 2eceab6..09cfe19 100644
--- a/utils/request.py
+++ b/utils/request.py
@@ -107,7 +107,7 @@ async def _do_update_common_server_base_urls():
 
     async def test_endpoint(base_url):
         try:
-            url = base_url + '/api/server_info'
+            url = base_url + '/api/ping'
             async with http_session.get(url, timeout=aiohttp.ClientTimeout(total=3)) as res:
                 res.raise_for_status()
                 sorted_common_server_base_urls.append(base_url)