diff --git a/main/mimi_config.h b/main/mimi_config.h
index 0b90860..9be7c08 100644
--- a/main/mimi_config.h
+++ b/main/mimi_config.h
@@ -43,6 +43,9 @@
 #ifndef MIMI_SECRET_FEISHU_APP_SECRET
 #define MIMI_SECRET_FEISHU_APP_SECRET ""
 #endif
+#ifndef MIMI_SECRET_TAVILY_KEY
+#define MIMI_SECRET_TAVILY_KEY      ""
+#endif
 
 /* WiFi */
 #define MIMI_WIFI_MAX_RETRY          10
@@ -141,6 +144,7 @@
 #define MIMI_NVS_KEY_FEISHU_APP_ID   "app_id"
 #define MIMI_NVS_KEY_FEISHU_APP_SECRET "app_secret"
 #define MIMI_NVS_KEY_API_KEY         "api_key"
+#define MIMI_NVS_KEY_TAVILY_KEY      "tavily_key"
 #define MIMI_NVS_KEY_MODEL           "model"
 #define MIMI_NVS_KEY_PROVIDER        "provider"
 #define MIMI_NVS_KEY_PROXY_HOST      "host"
diff --git a/main/tools/tool_web_search.h b/main/tools/tool_web_search.h
index ba5b87b..28b46f3 100644
--- a/main/tools/tool_web_search.h
+++ b/main/tools/tool_web_search.h
@@ -22,3 +22,8 @@ esp_err_t tool_web_search_execute(const char *input_json, char *output, size_t o
  * Save Brave Search API key to NVS.
  */
 esp_err_t tool_web_search_set_key(const char *api_key);
+
+/**
+ * Save Tavily API key to NVS.
+ */
+esp_err_t tool_web_search_set_tavily_key(const char *api_key);