diff --git a/frontend/src/components/valuecell/form/exchange-form.tsx b/frontend/src/components/valuecell/form/exchange-form.tsx
index e4886b8cf..be76d3dfe 100644
--- a/frontend/src/components/valuecell/form/exchange-form.tsx
+++ b/frontend/src/components/valuecell/form/exchange-form.tsx
@@ -128,7 +128,9 @@ export const ExchangeForm = withForm({
       } catch (_error) {
         setTestStatus({
           success: false,
-          message: "Failed, please check your API key",
+          message:
+            "Connection failed. Please check your API Key, Secret Key, or " +
+            "Passphrase.",
         });
       }
     };
diff --git a/python/valuecell/server/api/routers/strategy_agent.py b/python/valuecell/server/api/routers/strategy_agent.py
index ec0aa6ac3..4acc78992 100644
--- a/python/valuecell/server/api/routers/strategy_agent.py
+++ b/python/valuecell/server/api/routers/strategy_agent.py
@@ -282,7 +282,11 @@ async def test_exchange_connection(request: ExchangeConfig):
                     # But SuccessResponse implies 200.
                     # If I raise HTTPException it shows as error.
                     raise HTTPException(
-                        status_code=400, detail="Failed, please check your API key"
+                        status_code=400,
+                        detail=(
+                            "Connection failed. Please check your API Key, "
+                            "Secret Key, or Passphrase."
+                        ),
                     )
             finally:
                 await gateway.close()
@@ -291,7 +295,11 @@ async def test_exchange_connection(request: ExchangeConfig):
             # If create_ccxt_gateway fails or other error, avoid logging sensitive info
             logger.warning("Connection test failed")
             raise HTTPException(
-                status_code=400, detail="Failed, please check your API key"
+                status_code=400,
+                detail=(
+                    "Connection failed. Please check your API Key, "
+                    "Secret Key, or Passphrase."
+                ),
             )
 
     @router.delete("/delete")