diff --git a/service/xboard/service.go b/service/xboard/service.go
index 6f1e767c..9b19d19c 100644
--- a/service/xboard/service.go
+++ b/service/xboard/service.go
@@ -1003,6 +1003,81 @@ func (s *Service) setupNode() error {
 	return nil
 }
 
+func normalizePanelNodeType(nodeType string) string {
+	switch strings.ToLower(strings.TrimSpace(nodeType)) {
+	case "v2ray":
+		return "vmess"
+	case "hysteria2":
+		return "hysteria"
+	default:
+		return strings.ToLower(strings.TrimSpace(nodeType))
+	}
+}
+
+func (s *Service) panelRequest(method string, baseURL string, endpoint string, nodeID int, payload []byte, contentType string) (http.Header, []byte, int, error) {
+	nodeType := normalizePanelNodeType(s.options.NodeType)
+	nodeTypeCandidates := []string{nodeType}
+	if nodeType != "" {
+		nodeTypeCandidates = append(nodeTypeCandidates, "")
+	}
+
+	var lastHeader http.Header
+	var lastBody []byte
+	var lastStatus int
+	for index, candidate := range nodeTypeCandidates {
+		requestURL, err := url.Parse(strings.TrimRight(baseURL, "/") + endpoint)
+		if err != nil {
+			return nil, nil, 0, err
+		}
+		query := requestURL.Query()
+		query.Set("node_id", strconv.Itoa(nodeID))
+		query.Set("token", s.options.Key)
+		if candidate != "" {
+			query.Set("node_type", candidate)
+		}
+		requestURL.RawQuery = query.Encode()
+
+		var bodyReader io.Reader
+		if payload != nil {
+			bodyReader = bytes.NewReader(payload)
+		}
+		req, _ := http.NewRequest(method, requestURL.String(), bodyReader)
+		req.Header.Set("User-Agent", "sing-box/xboard")
+		if contentType != "" {
+			req.Header.Set("Content-Type", contentType)
+		}
+
+		logNodeType := candidate
+		if logNodeType == "" {
+			logNodeType = "<empty>"
+		}
+		s.logger.Info("Xboard panel request. endpoint=", endpoint, ", node_id=", nodeID, ", node_type=", logNodeType)
+
+		resp, err := s.httpClient.Do(req)
+		if err != nil {
+			return nil, nil, 0, err
+		}
+		responseBody, readErr := io.ReadAll(resp.Body)
+		resp.Body.Close()
+		if readErr != nil {
+			return nil, nil, 0, readErr
+		}
+
+		lastHeader = resp.Header.Clone()
+		lastBody = responseBody
+		lastStatus = resp.StatusCode
+
+		if resp.StatusCode == 400 && candidate != "" && strings.Contains(string(responseBody), "Server does not exist") && index+1 < len(nodeTypeCandidates) {
+			s.logger.Warn("Xboard panel request failed with node_type=", candidate, ", retrying without node_type")
+			continue
+		}
+
+		return lastHeader, lastBody, lastStatus, nil
+	}
+
+	return lastHeader, lastBody, lastStatus, nil
+}
+
 func (s *Service) fetchConfig() (*XNodeConfig, error) {
 	nodeID := s.options.ConfigNodeID
 	if nodeID == 0 {
@@ -1012,18 +1087,13 @@ func (s *Service) fetchConfig() (*XNodeConfig, error) {
 	if baseURL == "" {
 		baseURL = s.options.PanelURL
 	}
-	url := fmt.Sprintf("%s/api/v1/server/UniProxy/config?node_id=%d&node_type=%s&token=%s", baseURL, nodeID, s.options.NodeType, s.options.Key)
-	req, _ := http.NewRequest("GET", url, nil)
-	req.Header.Set("User-Agent", "sing-box/xboard")
-	
-	resp, err := s.httpClient.Do(req)
+	headers, body, statusCode, err := s.panelRequest("GET", baseURL, "/api/v1/server/UniProxy/config", nodeID, nil, "")
 	if err != nil {
 		return nil, err
 	}
-	defer resp.Body.Close()
 
 	// Check time drift
-	if dateStr := resp.Header.Get("Date"); dateStr != "" {
+	if dateStr := headers.Get("Date"); dateStr != "" {
 		if panelTime, err := http.ParseTime(dateStr); err == nil {
 			localTime := time.Now()
 			drift := localTime.Sub(panelTime)
@@ -1035,13 +1105,10 @@ func (s *Service) fetchConfig() (*XNodeConfig, error) {
 		}
 	}
 	
-	if resp.StatusCode != 200 {
-		respBody, _ := io.ReadAll(resp.Body)
-		return nil, E.New("failed to fetch config, status: ", resp.Status, ", body: ", string(respBody))
+	if statusCode != 200 {
+		return nil, E.New("failed to fetch config, status: ", statusCode, ", body: ", string(body))
 	}
 	
-	body, _ := io.ReadAll(resp.Body)
-	
 	var result struct {
 		Data XNodeConfig `json:"data"`
 	}
@@ -1249,22 +1316,15 @@ func (s *Service) pushTraffic(data any) error {
 	if baseURL == "" {
 		baseURL = s.options.PanelURL
 	}
-	url := fmt.Sprintf("%s/api/v1/server/UniProxy/push?node_id=%d&node_type=%s&token=%s", baseURL, nodeID, s.options.NodeType, s.options.Key)
 	body, _ := json.Marshal(data)
-	
-	req, _ := http.NewRequest("POST", url, bytes.NewBuffer(body))
-	req.Header.Set("Content-Type", "application/json")
-	req.Header.Set("User-Agent", "sing-box/xboard")
-	
-	resp, err := s.httpClient.Do(req)
+
+	_, responseBody, statusCode, err := s.panelRequest("POST", baseURL, "/api/v1/server/UniProxy/push", nodeID, body, "application/json")
 	if err != nil {
 		return err
 	}
-	defer resp.Body.Close()
-	
-	if resp.StatusCode != 200 {
-		respBody, _ := io.ReadAll(resp.Body)
-		return E.New("failed to push traffic, status: ", resp.Status, ", body: ", string(respBody))
+
+	if statusCode != 200 {
+		return E.New("failed to push traffic, status: ", statusCode, ", body: ", string(responseBody))
 	}
 	return nil
 }
@@ -1278,21 +1338,15 @@ func (s *Service) sendAlive() {
 	if baseURL == "" {
 		baseURL = s.options.PanelURL
 	}
-	url := fmt.Sprintf("%s/api/v1/server/UniProxy/alive?node_id=%d&node_type=%s&token=%s", baseURL, nodeID, s.options.NodeType, s.options.Key)
-	
-	req, _ := http.NewRequest("POST", url, nil)
-	req.Header.Set("User-Agent", "sing-box/xboard")
-	
-	resp, err := s.httpClient.Do(req)
+
+	_, responseBody, statusCode, err := s.panelRequest("POST", baseURL, "/api/v1/server/UniProxy/alive", nodeID, nil, "")
 	if err != nil {
 		s.logger.Error("Xboard heartbeat error: ", err)
 		return
 	}
-	defer resp.Body.Close()
-	
-	if resp.StatusCode != 200 {
-		respBody, _ := io.ReadAll(resp.Body)
-		s.logger.Warn("Xboard heartbeat failed, status: ", resp.Status, ", body: ", string(respBody))
+
+	if statusCode != 200 {
+		s.logger.Warn("Xboard heartbeat failed, status: ", statusCode, ", body: ", string(responseBody))
 	} else {
 		s.logger.Trace("Xboard heartbeat sent")
 	}
@@ -1369,23 +1423,15 @@ func (s *Service) fetchUsers() ([]XUser, error) {
 	if baseURL == "" {
 		baseURL = s.options.PanelURL
 	}
-	url := fmt.Sprintf("%s/api/v1/server/UniProxy/user?node_id=%d&node_type=%s&token=%s", baseURL, nodeID, s.options.NodeType, s.options.Key)
-	req, _ := http.NewRequest("GET", url, nil)
-	req.Header.Set("User-Agent", "sing-box/xboard")
-	
-	resp, err := s.httpClient.Do(req)
+	_, body, statusCode, err := s.panelRequest("GET", baseURL, "/api/v1/server/UniProxy/user", nodeID, nil, "")
 	if err != nil {
 		return nil, err
 	}
-	defer resp.Body.Close()
-	
-	if resp.StatusCode != 200 {
-		respBody, _ := io.ReadAll(resp.Body)
-		return nil, E.New("failed to fetch users, status: ", resp.Status, ", body: ", string(respBody))
+
+	if statusCode != 200 {
+		return nil, E.New("failed to fetch users, status: ", statusCode, ", body: ", string(body))
 	}
 	
-	body, _ := io.ReadAll(resp.Body)
-	
 	var result struct {
 		Data  []XUser `json:"data"`
 		Users []XUser `json:"users"`
diff --git a/service/xboard/service_test.go b/service/xboard/service_test.go
index 3f51d183..5d805d91 100644
--- a/service/xboard/service_test.go
+++ b/service/xboard/service_test.go
@@ -116,3 +116,18 @@ func TestBuildInboundMultiplex(t *testing.T) {
 		t.Fatalf("buildInboundMultiplex() brutal = %+v", got.Brutal)
 	}
 }
+
+func TestNormalizePanelNodeType(t *testing.T) {
+	tests := map[string]string{
+		"v2ray":     "vmess",
+		"hysteria2": "hysteria",
+		"vless":     "vless",
+		"":          "",
+	}
+
+	for input, want := range tests {
+		if got := normalizePanelNodeType(input); got != want {
+			t.Fatalf("normalizePanelNodeType(%q) = %q, want %q", input, got, want)
+		}
+	}
+}