diff --git a/controller/relay-utils.go b/controller/relay-utils.go
index c22144f..4f75efb 100644
--- a/controller/relay-utils.go
+++ b/controller/relay-utils.go
@@ -145,47 +145,48 @@ func countTokenMessages(messages []Message, model string) (int, error) {
 	for _, message := range messages {
 		tokenNum += tokensPerMessage
 		tokenNum += getTokenNum(tokenEncoder, message.Role)
-		var arrayContent []MediaMessage
-		if err := json.Unmarshal(message.Content, &arrayContent); err != nil {
-
-			var stringContent string
-			if err := json.Unmarshal(message.Content, &stringContent); err != nil {
-				return 0, err
-			} else {
-				tokenNum += getTokenNum(tokenEncoder, stringContent)
-				if message.Name != nil {
-					tokenNum += tokensPerName
-					tokenNum += getTokenNum(tokenEncoder, *message.Name)
-				}
-			}
-		} else {
-			for _, m := range arrayContent {
-				if m.Type == "image_url" {
-					var imageTokenNum int
-					if str, ok := m.ImageUrl.(string); ok {
-						imageTokenNum, err = getImageToken(&MessageImageUrl{Url: str, Detail: "auto"})
-					} else {
-						imageUrlMap := m.ImageUrl.(map[string]interface{})
-						detail, ok := imageUrlMap["detail"]
-						if ok {
-							imageUrlMap["detail"] = detail.(string)
-						} else {
-							imageUrlMap["detail"] = "auto"
-						}
-						imageUrl := MessageImageUrl{
-							Url:    imageUrlMap["url"].(string),
-							Detail: imageUrlMap["detail"].(string),
-						}
-						imageTokenNum, err = getImageToken(&imageUrl)
-					}
-					if err != nil {
-						return 0, err
-					}
-
-					tokenNum += imageTokenNum
-					log.Printf("image token num: %d", imageTokenNum)
+		if len(message.Content) > 0 {
+			var arrayContent []MediaMessage
+			if err := json.Unmarshal(message.Content, &arrayContent); err != nil {
+				var stringContent string
+				if err := json.Unmarshal(message.Content, &stringContent); err != nil {
+					return 0, err
 				} else {
-					tokenNum += getTokenNum(tokenEncoder, m.Text)
+					tokenNum += getTokenNum(tokenEncoder, stringContent)
+					if message.Name != nil {
+						tokenNum += tokensPerName
+						tokenNum += getTokenNum(tokenEncoder, *message.Name)
+					}
+				}
+			} else {
+				for _, m := range arrayContent {
+					if m.Type == "image_url" {
+						var imageTokenNum int
+						if str, ok := m.ImageUrl.(string); ok {
+							imageTokenNum, err = getImageToken(&MessageImageUrl{Url: str, Detail: "auto"})
+						} else {
+							imageUrlMap := m.ImageUrl.(map[string]interface{})
+							detail, ok := imageUrlMap["detail"]
+							if ok {
+								imageUrlMap["detail"] = detail.(string)
+							} else {
+								imageUrlMap["detail"] = "auto"
+							}
+							imageUrl := MessageImageUrl{
+								Url:    imageUrlMap["url"].(string),
+								Detail: imageUrlMap["detail"].(string),
+							}
+							imageTokenNum, err = getImageToken(&imageUrl)
+						}
+						if err != nil {
+							return 0, err
+						}
+
+						tokenNum += imageTokenNum
+						log.Printf("image token num: %d", imageTokenNum)
+					} else {
+						tokenNum += getTokenNum(tokenEncoder, m.Text)
+					}
 				}
 			}
 		}
diff --git a/controller/relay.go b/controller/relay.go
index 0ee7522..c835497 100644
--- a/controller/relay.go
+++ b/controller/relay.go
@@ -13,9 +13,11 @@ import (
 )
 
 type Message struct {
-	Role    string          `json:"role"`
-	Content json.RawMessage `json:"content"`
-	Name    *string         `json:"name,omitempty"`
+	Role       string          `json:"role"`
+	Content    json.RawMessage `json:"content"`
+	Name       *string         `json:"name,omitempty"`
+	ToolCalls  any             `json:"tool_calls,omitempty"`
+	ToolCallId string          `json:"tool_call_id,omitempty"`
 }
 
 type MediaMessage struct {