diff --git a/relay/channel/volcengine/adaptor.go b/relay/channel/volcengine/adaptor.go
index 21d6e1705..234ab4c99 100644
--- a/relay/channel/volcengine/adaptor.go
+++ b/relay/channel/volcengine/adaptor.go
@@ -195,21 +195,29 @@ func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
 		baseUrl = channelconstant.ChannelBaseURLs[channelconstant.ChannelTypeVolcEngine]
 	}
 
-	switch info.RelayMode {
-	case constant.RelayModeChatCompletions:
+	switch info.RelayFormat {
+	case types.RelayFormatClaude:
 		if strings.HasPrefix(info.UpstreamModelName, "bot") {
 			return fmt.Sprintf("%s/api/v3/bots/chat/completions", baseUrl), nil
 		}
 		return fmt.Sprintf("%s/api/v3/chat/completions", baseUrl), nil
-	case constant.RelayModeEmbeddings:
-		return fmt.Sprintf("%s/api/v3/embeddings", baseUrl), nil
-	case constant.RelayModeImagesGenerations:
-		return fmt.Sprintf("%s/api/v3/images/generations", baseUrl), nil
-	case constant.RelayModeImagesEdits:
-		return fmt.Sprintf("%s/api/v3/images/edits", baseUrl), nil
-	case constant.RelayModeRerank:
-		return fmt.Sprintf("%s/api/v3/rerank", baseUrl), nil
 	default:
+		switch info.RelayMode {
+		case constant.RelayModeChatCompletions:
+			if strings.HasPrefix(info.UpstreamModelName, "bot") {
+				return fmt.Sprintf("%s/api/v3/bots/chat/completions", baseUrl), nil
+			}
+			return fmt.Sprintf("%s/api/v3/chat/completions", baseUrl), nil
+		case constant.RelayModeEmbeddings:
+			return fmt.Sprintf("%s/api/v3/embeddings", baseUrl), nil
+		case constant.RelayModeImagesGenerations:
+			return fmt.Sprintf("%s/api/v3/images/generations", baseUrl), nil
+		case constant.RelayModeImagesEdits:
+			return fmt.Sprintf("%s/api/v3/images/edits", baseUrl), nil
+		case constant.RelayModeRerank:
+			return fmt.Sprintf("%s/api/v3/rerank", baseUrl), nil
+		default:
+		}
 	}
 	return "", fmt.Errorf("unsupported relay mode: %d", info.RelayMode)
 }