diff --git a/services/alphavantage-provider-service/src/api_test.rs b/services/alphavantage-provider-service/src/api_test.rs
index bc96024..da56e97 100644
--- a/services/alphavantage-provider-service/src/api_test.rs
+++ b/services/alphavantage-provider-service/src/api_test.rs
@@ -6,7 +6,7 @@ use tracing::{info, warn};
 #[derive(Deserialize)]
 pub struct TestConnectionRequest {
     // This is the MCP endpoint URL
-    pub api_url: String,
+    pub api_url: Option<String>,
     // The API key is passed for validation but might not be used directly
     // in the MCP connection itself, depending on auth mechanism.
     pub api_key: Option<String>,
@@ -23,20 +23,15 @@ pub struct TestConnectionResponse {
 pub async fn test_connection(
     Json(payload): Json<TestConnectionRequest>,
 ) -> impl IntoResponse {
-    info!("Testing connection to MCP endpoint: {}", payload.api_url);
+    // Default MCP URL if not provided
+    let base_url = payload.api_url
+        .filter(|s| !s.is_empty())
+        .unwrap_or_else(|| "https://mcp.alphavantage.co/mcp".to_string());
 
-    if payload.api_url.is_empty() {
-        return (
-            StatusCode::BAD_REQUEST,
-            Json(TestConnectionResponse {
-                success: false,
-                message: "API URL (MCP Endpoint) cannot be empty.".to_string(),
-            }),
-        ).into_response();
-    }
+    info!("Testing connection to MCP endpoint: {}", base_url);
 
     // 要求传入 base MCP URL（不包含查询参数）与 api_key，然后按官方文档拼接 ?apikey=
-    if payload.api_url.contains('?') {
+    if base_url.contains('?') {
         return (
             StatusCode::BAD_REQUEST,
             Json(TestConnectionResponse {
@@ -45,6 +40,7 @@ pub async fn test_connection(
             }),
         ).into_response();
     }
+    
     let Some(key) = &payload.api_key else {
         return (
             StatusCode::BAD_REQUEST,
@@ -54,7 +50,8 @@ pub async fn test_connection(
             }),
         ).into_response();
     };
-    let final_url = format!("{}?apikey={}", payload.api_url, key);
+    
+    let final_url = format!("{}?apikey={}", base_url, key);
     info!("Testing MCP with final endpoint: {}", final_url);
     let mcp_client = match AvClient::connect(&final_url).await {
         Ok(client) => client,