diff --git a/pkg/server/channels_api.go b/pkg/server/channels_api.go
index 44bcaec..e909ea2 100644
--- a/pkg/server/channels_api.go
+++ b/pkg/server/channels_api.go
@@ -43,7 +43,13 @@ func listChannel(c *fiber.Ctx) error {
 func listOwnedChannel(c *fiber.Ctx) error {
 	user := c.Locals("principal").(models.Account)
 
-	channels, err := services.ListChannelWithUser(user)
+	var err error
+	var channels []models.Channel
+	if val, ok := c.Locals("realm").(models.Realm); ok {
+		channels, err = services.ListChannelWithUser(user, val.ID)
+	} else {
+		channels, err = services.ListChannelWithUser(user)
+	}
 	if err != nil {
 		return fiber.NewError(fiber.StatusBadRequest, err.Error())
 	}
@@ -54,7 +60,13 @@ func listOwnedChannel(c *fiber.Ctx) error {
 func listAvailableChannel(c *fiber.Ctx) error {
 	user := c.Locals("principal").(models.Account)
 
-	channels, err := services.ListChannelIsAvailable(user)
+	var err error
+	var channels []models.Channel
+	if val, ok := c.Locals("realm").(models.Realm); ok {
+		channels, err = services.ListAvailableChannel(user, val.ID)
+	} else {
+		channels, err = services.ListAvailableChannel(user)
+	}
 	if err != nil {
 		return fiber.NewError(fiber.StatusBadRequest, err.Error())
 	}
diff --git a/pkg/server/messages_api.go b/pkg/server/messages_api.go
index ebdf2e3..faa8763 100644
--- a/pkg/server/messages_api.go
+++ b/pkg/server/messages_api.go
@@ -55,9 +55,19 @@ func newMessage(c *fiber.Ctx) error {
 		return fmt.Errorf("you must write or upload some content in a single message")
 	}
 
-	channel, member, err := services.GetAvailableChannelWithAlias(alias, user)
-	if err != nil {
-		return fiber.NewError(fiber.StatusNotFound, err.Error())
+	var err error
+	var channel models.Channel
+	var member models.ChannelMember
+	if val, ok := c.Locals("realm").(models.Realm); ok {
+		channel, member, err = services.GetAvailableChannelWithAlias(alias, user, val.ID)
+		if err != nil {
+			return fiber.NewError(fiber.StatusNotFound, err.Error())
+		}
+	} else {
+		channel, member, err = services.GetAvailableChannelWithAlias(alias, user)
+		if err != nil {
+			return fiber.NewError(fiber.StatusNotFound, err.Error())
+		}
 	}
 
 	message := models.Message{
@@ -102,17 +112,30 @@ func editMessage(c *fiber.Ctx) error {
 		return err
 	}
 
+	var err error
+	var channel models.Channel
+	var member models.ChannelMember
+	if val, ok := c.Locals("realm").(models.Realm); ok {
+		channel, member, err = services.GetAvailableChannelWithAlias(alias, user, val.ID)
+		if err != nil {
+			return fiber.NewError(fiber.StatusNotFound, err.Error())
+		}
+	} else {
+		channel, member, err = services.GetAvailableChannelWithAlias(alias, user)
+		if err != nil {
+			return fiber.NewError(fiber.StatusNotFound, err.Error())
+		}
+	}
+
 	var message models.Message
-	if channel, member, err := services.GetAvailableChannelWithAlias(alias, user); err != nil {
-		return fiber.NewError(fiber.StatusNotFound, err.Error())
-	} else if message, err = services.GetMessageWithPrincipal(channel, member, uint(messageId)); err != nil {
+	if message, err = services.GetMessageWithPrincipal(channel, member, uint(messageId)); err != nil {
 		return fiber.NewError(fiber.StatusNotFound, err.Error())
 	}
 
 	message.Content = data.Content
 	message.Attachments = data.Attachments
 
-	message, err := services.EditMessage(message)
+	message, err = services.EditMessage(message)
 	if err != nil {
 		return fiber.NewError(fiber.StatusBadRequest, err.Error())
 	}
@@ -125,14 +148,27 @@ func deleteMessage(c *fiber.Ctx) error {
 	alias := c.Params("channel")
 	messageId, _ := c.ParamsInt("messageId", 0)
 
+	var err error
+	var channel models.Channel
+	var member models.ChannelMember
+	if val, ok := c.Locals("realm").(models.Realm); ok {
+		channel, member, err = services.GetAvailableChannelWithAlias(alias, user, val.ID)
+		if err != nil {
+			return fiber.NewError(fiber.StatusNotFound, err.Error())
+		}
+	} else {
+		channel, member, err = services.GetAvailableChannelWithAlias(alias, user)
+		if err != nil {
+			return fiber.NewError(fiber.StatusNotFound, err.Error())
+		}
+	}
+
 	var message models.Message
-	if channel, member, err := services.GetAvailableChannelWithAlias(alias, user); err != nil {
-		return fiber.NewError(fiber.StatusNotFound, err.Error())
-	} else if message, err = services.GetMessageWithPrincipal(channel, member, uint(messageId)); err != nil {
+	if message, err = services.GetMessageWithPrincipal(channel, member, uint(messageId)); err != nil {
 		return fiber.NewError(fiber.StatusNotFound, err.Error())
 	}
 
-	message, err := services.DeleteMessage(message)
+	message, err = services.DeleteMessage(message)
 	if err != nil {
 		return fiber.NewError(fiber.StatusBadRequest, err.Error())
 	}
diff --git a/pkg/services/channels.go b/pkg/services/channels.go
index 1b5bae4..a68c21a 100644
--- a/pkg/services/channels.go
+++ b/pkg/services/channels.go
@@ -42,11 +42,11 @@ func GetChannelWithAlias(alias string, realmId ...uint) (models.Channel, error)
 	return channel, nil
 }
 
-func GetAvailableChannelWithAlias(alias string, user models.Account) (models.Channel, models.ChannelMember, error) {
+func GetAvailableChannelWithAlias(alias string, user models.Account, realmId ...uint) (models.Channel, models.ChannelMember, error) {
 	var err error
 	var member models.ChannelMember
 	var channel models.Channel
-	if channel, err = GetChannelWithAlias(alias); err != nil {
+	if channel, err = GetChannelWithAlias(alias, realmId...); err != nil {
 		return channel, member, err
 	}
 
@@ -93,16 +93,22 @@ func ListChannel(realmId ...uint) ([]models.Channel, error) {
 	return channels, nil
 }
 
-func ListChannelWithUser(user models.Account) ([]models.Channel, error) {
+func ListChannelWithUser(user models.Account, realmId ...uint) ([]models.Channel, error) {
 	var channels []models.Channel
-	if err := database.C.Where(&models.Channel{AccountID: user.ID}).Find(&channels).Error; err != nil {
+	tx := database.C.Where(&models.Channel{AccountID: user.ID})
+	if len(realmId) > 0 {
+		tx = tx.Where("realm_id = ?", realmId)
+	} else {
+		tx = tx.Where("realm_id IS NULL")
+	}
+	if err := tx.Find(&channels).Error; err != nil {
 		return channels, err
 	}
 
 	return channels, nil
 }
 
-func ListChannelIsAvailable(user models.Account) ([]models.Channel, error) {
+func ListAvailableChannel(user models.Account, realmId ...uint) ([]models.Channel, error) {
 	var channels []models.Channel
 	var members []models.ChannelMember
 	if err := database.C.Where(&models.ChannelMember{
@@ -115,7 +121,13 @@ func ListChannelIsAvailable(user models.Account) ([]models.Channel, error) {
 		return item.ChannelID
 	})
 
-	if err := database.C.Where("id IN ?", idx).Find(&channels).Error; err != nil {
+	tx := database.C.Where("id IN ?", idx)
+	if len(realmId) > 0 {
+		tx = tx.Where("realm_id = ?", realmId)
+	} else {
+		tx = tx.Where("realm_id IS NULL")
+	}
+	if err := tx.Find(&channels).Error; err != nil {
 		return channels, err
 	}