diff --git a/internal/router/routes.go b/internal/router/routes.go
index a9604ee..59e8359 100644
--- a/internal/router/routes.go
+++ b/internal/router/routes.go
@@ -1,6 +1,7 @@
 package router
 
 import (
+	"net/http"
 	"strings"
 
 	_ "github.com/fluffy-melli/korcen-api/docs"
@@ -9,37 +10,50 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
-// @Summary		Process Korcen Request
-// @Description	Processes a Korcen request and returns the result
-// @Tags			korcen
-// @Accept			json
-// @Produce		json
-// @Param			input	body		check.Header	true	"Korcen Input"
-// @Success		200		{object}	check.Respond	"Korcen Result"
-// @Failure		400		{object}	map[string]interface{}	"Invalid Request"
-// @Router			/api/v1/korcen [post]
+// @Summary     Process Korcen Request
+// @Description Processes a Korcen request and returns the result
+// @Tags        korcen
+// @Accept      json,xml
+// @Produce     json,xml
+// @Param       input  body  check.Header  true  "Korcen Input"
+// @Success     200    {object}  check.Respond    "Korcen Result"
+// @Failure     400    {object}  map[string]interface{}  "Invalid Request"
+// @Router      /api/v1/korcen [post]
 func Korcen(c *gin.Context) {
 	var header check.Header
 
-	if err := c.ShouldBindJSON(&header); err != nil {
-		c.JSON(400, gin.H{"error": "Invalid request"})
-		return
+	switch c.ContentType() {
+	case "application/xml":
+		if err := c.ShouldBindXML(&header); err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid XML request"})
+			return
+		}
+	default:
+		if err := c.ShouldBindJSON(&header); err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid JSON request"})
+			return
+		}
 	}
 
 	if strings.TrimSpace(header.Input) == "" {
-		c.JSON(400, gin.H{"error": "Invalid request"})
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request: empty input"})
 		return
 	}
 
 	response := check.Korcen(&header)
 
-	c.JSON(200, response)
+	if c.GetHeader("Accept") == "application/xml" {
+		c.XML(http.StatusOK, response)
+	} else {
+		c.JSON(http.StatusOK, response)
+	}
 }
 
 func SetupRouter() *gin.Engine {
 	gin.SetMode(gin.ReleaseMode)
 	r := gin.Default()
 	r.Use(middleware.TokenBucketMiddleware())
+
 	APIGroup := r.Group("/api/v1")
 	{
 		APIGroup.POST("/korcen", Korcen)
diff --git a/main.go b/main.go
index c2142f9..c00ede5 100644
--- a/main.go
+++ b/main.go
@@ -1,8 +1,12 @@
-// hi/korcen-api/main.go
+// korcen-api/main.go
 
 package main
 
 import (
+	"fmt"
+	"log"
+	"os"
+
 	_ "github.com/fluffy-melli/korcen-api/docs"
 	"github.com/fluffy-melli/korcen-api/internal/router"
 	swaggerFiles "github.com/swaggo/files"
@@ -10,7 +14,12 @@ import (
 )
 
 func main() {
+	fmt.Println("Korcen API Server Start")
+
 	setup := router.SetupRouter()
 	setup.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))
-	setup.Run(":7777")
+	if err := setup.Run(":7777"); err != nil {
+		log.Println("Failed to start server:", err)
+		os.Exit(1)
+	}
 }
diff --git a/pkg/check/korcen.go b/pkg/check/korcen.go
index 3ad8f25..e922581 100644
--- a/pkg/check/korcen.go
+++ b/pkg/check/korcen.go
@@ -3,20 +3,24 @@
 package check
 
 import (
+	"encoding/xml"
+
 	"github.com/fluffy-melli/korcen-go"
 )
 
 type Header struct {
-	Input string `json:"input"`
-	Start string `json:"replace-front"`
-	End   string `json:"replace-end"`
+	XMLName xml.Name `json:"-" xml:"header"`
+	Input   string   `json:"input" xml:"input"`
+	Start   string   `json:"replace-front" xml:"replace-front"`
+	End     string   `json:"replace-end" xml:"replace-end"`
 }
 
 type Respond struct {
-	Detect    bool   `json:"detect"`
-	Swear     string `json:"swear"`
-	String    string `json:"input"`
-	NewString string `json:"output"`
+	XMLName   xml.Name `json:"-" xml:"respond"`
+	Detect    bool     `json:"detect" xml:"detect"`
+	Swear     string   `json:"swear" xml:"swear"`
+	String    string   `json:"input" xml:"input"`
+	NewString string   `json:"output" xml:"output"`
 }
 
 func Korcen(header *Header) *Respond {