diff --git a/androidExportReader/.idea/gradle.xml b/androidExportReader/.idea/gradle.xml
index ba1ec5c..611e7c8 100644
--- a/androidExportReader/.idea/gradle.xml
+++ b/androidExportReader/.idea/gradle.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
diff --git a/scnserver/api/handler/compat.go b/scnserver/api/handler/compat.go
index 3abfbe3..f7476b5 100644
--- a/scnserver/api/handler/compat.go
+++ b/scnserver/api/handler/compat.go
@@ -37,7 +37,7 @@ func NewCompatHandler(app *logic.Application) CompatHandler {
 // @Param       query_data query    handler.SendMessageCompat.combined false " "
 // @Param       form_data  formData handler.SendMessageCompat.combined false " "
 //
-// @Success     200        {object} handler.sendMessageInternal.response
+// @Success     200        {object} handler.SendMessageCompat.response
 // @Failure     400        {object} ginresp.apiError
 // @Failure     401        {object} ginresp.apiError
 // @Failure     403        {object} ginresp.apiError
@@ -54,6 +54,18 @@ func (h MessageHandler) SendMessageCompat(g *gin.Context) ginresp.HTTPResponse {
 		UserMessageID *string  `json:"msg_id"    form:"msg_id"`
 		SendTimestamp *float64 `json:"timestamp" form:"timestamp"`
 	}
+	type response struct {
+		Success        bool            `json:"success"`
+		ErrorID        apierr.APIError `json:"error"`
+		ErrorHighlight int             `json:"errhighlight"`
+		Message        string          `json:"message"`
+		SuppressSend   bool            `json:"suppress_send"`
+		MessageCount   int             `json:"messagecount"`
+		Quota          int             `json:"quota"`
+		IsPro          bool            `json:"is_pro"`
+		QuotaMax       int             `json:"quota_max"`
+		SCNMessageID   int64           `json:"scn_msg_id"`
+	}
 
 	var f combined
 	var q combined
@@ -73,7 +85,57 @@ func (h MessageHandler) SendMessageCompat(g *gin.Context) ginresp.HTTPResponse {
 		return ginresp.SendAPIError(g, 400, apierr.USER_NOT_FOUND, hl.USER_ID, "User not found (compat)", nil)
 	}
 
-	return h.sendMessageInternal(g, ctx, langext.Ptr(models.UserID(*newid)), data.UserKey, nil, nil, data.Title, data.Content, data.Priority, data.UserMessageID, data.SendTimestamp, nil)
+	okResp, errResp := h.sendMessageInternal(g, ctx, langext.Ptr(models.UserID(*newid)), data.UserKey, nil, nil, data.Title, data.Content, data.Priority, data.UserMessageID, data.SendTimestamp, nil)
+	if errResp != nil {
+		return *errResp
+	} else {
+		if okResp.MessageIsOld {
+
+			compatMessageID, _, err := h.database.ConvertToCompatID(ctx, okResp.Message.MessageID.String())
+			if err != nil {
+				return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query compat-id", err)
+			}
+			if compatMessageID == nil {
+				v, err := h.database.CreateCompatID(ctx, "messageid", okResp.Message.MessageID.String())
+				if err != nil {
+					return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to create compat-id", err)
+				}
+				compatMessageID = &v
+			}
+
+			return ctx.FinishSuccess(ginresp.JSON(http.StatusOK, response{
+				Success:        true,
+				ErrorID:        apierr.NO_ERROR,
+				ErrorHighlight: -1,
+				Message:        "Message already sent",
+				SuppressSend:   true,
+				MessageCount:   okResp.User.MessagesSent,
+				Quota:          okResp.User.QuotaUsedToday(),
+				IsPro:          okResp.User.IsPro,
+				QuotaMax:       okResp.User.QuotaPerDay(),
+				SCNMessageID:   *compatMessageID,
+			}))
+		} else {
+
+			compatMessageID, err := h.database.CreateCompatID(ctx, "messageid", okResp.Message.MessageID.String())
+			if err != nil {
+				return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to create compat-id", err)
+			}
+
+			return ctx.FinishSuccess(ginresp.JSON(http.StatusOK, response{
+				Success:        true,
+				ErrorID:        apierr.NO_ERROR,
+				ErrorHighlight: -1,
+				Message:        "Message sent",
+				SuppressSend:   false,
+				MessageCount:   okResp.User.MessagesSent + 1,
+				Quota:          okResp.User.QuotaUsedToday() + 1,
+				IsPro:          okResp.User.IsPro,
+				QuotaMax:       okResp.User.QuotaPerDay(),
+				SCNMessageID:   compatMessageID,
+			}))
+		}
+	}
 }
 
 // Register swaggerdoc
@@ -93,7 +155,7 @@ func (h MessageHandler) SendMessageCompat(g *gin.Context) ginresp.HTTPResponse {
 // @Param   pro_token formData string true "the (android) IAP token"
 //
 // @Success 200       {object} handler.Register.response
-// @Failure 200       {object} ginresp.compatAPIError
+// @Failure default   {object} ginresp.compatAPIError
 //
 // @Router  /api/register.php [get]
 func (h CompatHandler) Register(g *gin.Context) ginresp.HTTPResponse {
@@ -168,7 +230,7 @@ func (h CompatHandler) Register(g *gin.Context) ginresp.HTTPResponse {
 		return ginresp.CompatAPIError(0, "Failed to create user in db")
 	}
 
-	_, err = h.database.CreateClient(ctx, user.UserID, models.ClientTypeAndroid, *data.FCMToken, "compat", "compat")
+	_, err = h.database.CreateClient(ctx, user.UserID, models.ClientTypeAndroid, "ANDROID|v1|"+*data.FCMToken, "compat", "compat")
 	if err != nil {
 		return ginresp.CompatAPIError(0, "Failed to create client in db")
 	}
@@ -204,7 +266,7 @@ func (h CompatHandler) Register(g *gin.Context) ginresp.HTTPResponse {
 // @Param   user_key formData string true "the user_key"
 //
 // @Success 200      {object} handler.Info.response
-// @Failure 200      {object} ginresp.compatAPIError
+// @Failure default  {object} ginresp.compatAPIError
 //
 // @Router  /api/info.php [get]
 func (h CompatHandler) Info(g *gin.Context) ginresp.HTTPResponse {
@@ -298,7 +360,7 @@ func (h CompatHandler) Info(g *gin.Context) ginresp.HTTPResponse {
 // @Param   scn_msg_id formData string true "the message id"
 //
 // @Success 200        {object} handler.Ack.response
-// @Failure 200        {object} ginresp.compatAPIError
+// @Failure default    {object} ginresp.compatAPIError
 //
 // @Router  /api/ack.php [get]
 func (h CompatHandler) Ack(g *gin.Context) ginresp.HTTPResponse {
@@ -354,6 +416,8 @@ func (h CompatHandler) Ack(g *gin.Context) ginresp.HTTPResponse {
 		return ginresp.CompatAPIError(204, "Authentification failed")
 	}
 
+	// we no longer ack messages - this is a no-op
+
 	return ctx.FinishSuccess(ginresp.JSON(http.StatusOK, response{
 		Success:      true,
 		Message:      "ok",
@@ -377,7 +441,7 @@ func (h CompatHandler) Ack(g *gin.Context) ginresp.HTTPResponse {
 // @Param   user_key formData string true "the user_key"
 //
 // @Success 200      {object} handler.Requery.response
-// @Failure 200      {object} ginresp.compatAPIError
+// @Failure default  {object} ginresp.compatAPIError
 //
 // @Router  /api/requery.php [get]
 func (h CompatHandler) Requery(g *gin.Context) ginresp.HTTPResponse {
@@ -454,7 +518,7 @@ func (h CompatHandler) Requery(g *gin.Context) ginresp.HTTPResponse {
 // @Param   fcm_token formData string true "the (android) fcm token"
 //
 // @Success 200       {object} handler.Update.response
-// @Failure 200       {object} ginresp.compatAPIError
+// @Failure default   {object} ginresp.compatAPIError
 //
 // @Router  /api/update.php [get]
 func (h CompatHandler) Update(g *gin.Context) ginresp.HTTPResponse {
@@ -535,7 +599,7 @@ func (h CompatHandler) Update(g *gin.Context) ginresp.HTTPResponse {
 
 		}
 
-		_, err = h.database.CreateClient(ctx, user.UserID, models.ClientTypeAndroid, *data.FCMToken, "compat", "compat")
+		_, err = h.database.CreateClient(ctx, user.UserID, models.ClientTypeAndroid, "ANDROID|v1|"+*data.FCMToken, "compat", "compat")
 		if err != nil {
 			return ginresp.CompatAPIError(0, "Failed to delete client")
 		}
@@ -575,7 +639,7 @@ func (h CompatHandler) Update(g *gin.Context) ginresp.HTTPResponse {
 // @Param   scn_msg_id formData string true "The message-id"
 //
 // @Success 200        {object} handler.Expand.response
-// @Failure 200        {object} ginresp.compatAPIError
+// @Failure default    {object} ginresp.compatAPIError
 //
 // @Router  /api/expand.php [get]
 func (h CompatHandler) Expand(g *gin.Context) ginresp.HTTPResponse {
@@ -680,7 +744,7 @@ func (h CompatHandler) Expand(g *gin.Context) ginresp.HTTPResponse {
 // @Param   pro_token formData string true "the (android) IAP token"
 //
 // @Success 200       {object} handler.Upgrade.response
-// @Failure 200       {object} ginresp.compatAPIError
+// @Failure default   {object} ginresp.compatAPIError
 //
 // @Router  /api/upgrade.php [get]
 func (h CompatHandler) Upgrade(g *gin.Context) ginresp.HTTPResponse {
diff --git a/scnserver/api/handler/message.go b/scnserver/api/handler/message.go
index b20b8a6..61a72eb 100644
--- a/scnserver/api/handler/message.go
+++ b/scnserver/api/handler/message.go
@@ -19,6 +19,12 @@ import (
 	"time"
 )
 
+type SendMessageResponse struct {
+	User         models.User
+	Message      models.Message
+	MessageIsOld bool
+}
+
 type MessageHandler struct {
 	app      *logic.Application
 	database *primarydb.Database
@@ -41,7 +47,7 @@ func NewMessageHandler(app *logic.Application) MessageHandler {
 // @Param       post_body  body     handler.SendMessage.combined false " "
 // @Param       form_body  formData handler.SendMessage.combined false " "
 //
-// @Success     200        {object} handler.sendMessageInternal.response
+// @Success     200        {object} handler.SendMessage.response
 // @Failure     400        {object} ginresp.apiError
 // @Failure     401        {object} ginresp.apiError "The user_id was not found or the user_key is wrong"
 // @Failure     403        {object} ginresp.apiError "The user has exceeded its daily quota - wait 24 hours or upgrade your account"
@@ -63,23 +69,6 @@ func (h MessageHandler) SendMessage(g *gin.Context) ginresp.HTTPResponse {
 		SenderName    *string        `json:"sender_name" form:"sender_name" example:"example-server"                     `
 	}
 
-	var b combined
-	var q combined
-	var f combined
-	ctx, errResp := h.app.StartRequest(g, nil, &q, &b, &f)
-	if errResp != nil {
-		return *errResp
-	}
-	defer ctx.Cancel()
-
-	// query has highest prio, then form, then json
-	data := dataext.ObjectMerge(dataext.ObjectMerge(b, f), q)
-
-	return h.sendMessageInternal(g, ctx, data.UserID, data.UserKey, data.Channel, data.ChanKey, data.Title, data.Content, data.Priority, data.UserMessageID, data.SendTimestamp, data.SenderName)
-
-}
-
-func (h MessageHandler) sendMessageInternal(g *gin.Context, ctx *logic.AppContext, UserID *models.UserID, UserKey *string, Channel *string, ChanKey *string, Title *string, Content *string, Priority *int, UserMessageID *string, SendTimestamp *float64, SenderName *string) ginresp.HTTPResponse {
 	type response struct {
 		Success        bool             `json:"success"`
 		ErrorID        apierr.APIError  `json:"error"`
@@ -93,6 +82,53 @@ func (h MessageHandler) sendMessageInternal(g *gin.Context, ctx *logic.AppContex
 		SCNMessageID   models.MessageID `json:"scn_msg_id"`
 	}
 
+	var b combined
+	var q combined
+	var f combined
+	ctx, errResp := h.app.StartRequest(g, nil, &q, &b, &f)
+	if errResp != nil {
+		return *errResp
+	}
+	defer ctx.Cancel()
+
+	// query has highest prio, then form, then json
+	data := dataext.ObjectMerge(dataext.ObjectMerge(b, f), q)
+
+	okResp, errResp := h.sendMessageInternal(g, ctx, data.UserID, data.UserKey, data.Channel, data.ChanKey, data.Title, data.Content, data.Priority, data.UserMessageID, data.SendTimestamp, data.SenderName)
+	if errResp != nil {
+		return *errResp
+	} else {
+		if okResp.MessageIsOld {
+			return ctx.FinishSuccess(ginresp.JSON(http.StatusOK, response{
+				Success:        true,
+				ErrorID:        apierr.NO_ERROR,
+				ErrorHighlight: -1,
+				Message:        "Message already sent",
+				SuppressSend:   true,
+				MessageCount:   okResp.User.MessagesSent,
+				Quota:          okResp.User.QuotaUsedToday(),
+				IsPro:          okResp.User.IsPro,
+				QuotaMax:       okResp.User.QuotaPerDay(),
+				SCNMessageID:   okResp.Message.MessageID,
+			}))
+		} else {
+			return ctx.FinishSuccess(ginresp.JSON(http.StatusOK, response{
+				Success:        true,
+				ErrorID:        apierr.NO_ERROR,
+				ErrorHighlight: -1,
+				Message:        "Message sent",
+				SuppressSend:   false,
+				MessageCount:   okResp.User.MessagesSent + 1,
+				Quota:          okResp.User.QuotaUsedToday() + 1,
+				IsPro:          okResp.User.IsPro,
+				QuotaMax:       okResp.User.QuotaPerDay(),
+				SCNMessageID:   okResp.Message.MessageID,
+			}))
+		}
+	}
+}
+
+func (h MessageHandler) sendMessageInternal(g *gin.Context, ctx *logic.AppContext, UserID *models.UserID, UserKey *string, Channel *string, ChanKey *string, Title *string, Content *string, Priority *int, UserMessageID *string, SendTimestamp *float64, SenderName *string) (*SendMessageResponse, *ginresp.HTTPResponse) {
 	if Title != nil {
 		Title = langext.Ptr(strings.TrimSpace(*Title))
 	}
@@ -101,27 +137,27 @@ func (h MessageHandler) sendMessageInternal(g *gin.Context, ctx *logic.AppContex
 	}
 
 	if UserID == nil {
-		return ginresp.SendAPIError(g, 400, apierr.MISSING_UID, hl.USER_ID, "Missing parameter [[user_id]]", nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.MISSING_UID, hl.USER_ID, "Missing parameter [[user_id]]", nil))
 	}
 	if UserKey == nil {
-		return ginresp.SendAPIError(g, 400, apierr.MISSING_TOK, hl.USER_KEY, "Missing parameter [[user_token]]", nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.MISSING_TOK, hl.USER_KEY, "Missing parameter [[user_token]]", nil))
 	}
 	if Title == nil {
-		return ginresp.SendAPIError(g, 400, apierr.MISSING_TITLE, hl.TITLE, "Missing parameter [[title]]", nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.MISSING_TITLE, hl.TITLE, "Missing parameter [[title]]", nil))
 	}
 	if Priority != nil && (*Priority != 0 && *Priority != 1 && *Priority != 2) {
-		return ginresp.SendAPIError(g, 400, apierr.INVALID_PRIO, hl.PRIORITY, "Invalid priority", nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.INVALID_PRIO, hl.PRIORITY, "Invalid priority", nil))
 	}
 	if len(*Title) == 0 {
-		return ginresp.SendAPIError(g, 400, apierr.NO_TITLE, hl.TITLE, "No title specified", nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.NO_TITLE, hl.TITLE, "No title specified", nil))
 	}
 
 	user, err := h.database.GetUser(ctx, *UserID)
 	if err == sql.ErrNoRows {
-		return ginresp.SendAPIError(g, 400, apierr.USER_NOT_FOUND, hl.USER_ID, "User not found", nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.USER_NOT_FOUND, hl.USER_ID, "User not found", err))
 	}
 	if err != nil {
-		return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query user", err)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query user", err))
 	}
 
 	channelDisplayName := user.DefaultChannel()
@@ -132,51 +168,44 @@ func (h MessageHandler) sendMessageInternal(g *gin.Context, ctx *logic.AppContex
 	}
 
 	if len(*Title) > user.MaxTitleLength() {
-		return ginresp.SendAPIError(g, 400, apierr.TITLE_TOO_LONG, hl.TITLE, fmt.Sprintf("Title too long (max %d characters)", user.MaxTitleLength()), nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.TITLE_TOO_LONG, hl.TITLE, fmt.Sprintf("Title too long (max %d characters)", user.MaxTitleLength()), nil))
 	}
 	if Content != nil && len(*Content) > user.MaxContentLength() {
-		return ginresp.SendAPIError(g, 400, apierr.CONTENT_TOO_LONG, hl.CONTENT, fmt.Sprintf("Content too long (%d characters; max := %d characters)", len(*Content), user.MaxContentLength()), nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.CONTENT_TOO_LONG, hl.CONTENT, fmt.Sprintf("Content too long (%d characters; max := %d characters)", len(*Content), user.MaxContentLength()), nil))
 	}
 	if len(channelDisplayName) > user.MaxChannelNameLength() {
-		return ginresp.SendAPIError(g, 400, apierr.CHANNEL_TOO_LONG, hl.CHANNEL, fmt.Sprintf("Channel too long (max %d characters)", user.MaxChannelNameLength()), nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.CHANNEL_TOO_LONG, hl.CHANNEL, fmt.Sprintf("Channel too long (max %d characters)", user.MaxChannelNameLength()), nil))
 	}
 	if len(channelInternalName) > user.MaxChannelNameLength() {
-		return ginresp.SendAPIError(g, 400, apierr.CHANNEL_TOO_LONG, hl.CHANNEL, fmt.Sprintf("Channel too long (max %d characters)", user.MaxChannelNameLength()), nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.CHANNEL_TOO_LONG, hl.CHANNEL, fmt.Sprintf("Channel too long (max %d characters)", user.MaxChannelNameLength()), nil))
 	}
 	if SenderName != nil && len(*SenderName) > user.MaxSenderName() {
-		return ginresp.SendAPIError(g, 400, apierr.SENDERNAME_TOO_LONG, hl.SENDER_NAME, fmt.Sprintf("SenderName too long (max %d characters)", user.MaxSenderName()), nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.SENDERNAME_TOO_LONG, hl.SENDER_NAME, fmt.Sprintf("SenderName too long (max %d characters)", user.MaxSenderName()), nil))
 	}
 	if UserMessageID != nil && len(*UserMessageID) > user.MaxUserMessageID() {
-		return ginresp.SendAPIError(g, 400, apierr.USR_MSG_ID_TOO_LONG, hl.USER_MESSAGE_ID, fmt.Sprintf("MessageID too long (max %d characters)", user.MaxUserMessageID()), nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.USR_MSG_ID_TOO_LONG, hl.USER_MESSAGE_ID, fmt.Sprintf("MessageID too long (max %d characters)", user.MaxUserMessageID()), nil))
 	}
 	if SendTimestamp != nil && mathext.Abs(*SendTimestamp-float64(time.Now().Unix())) > timeext.FromHours(user.MaxTimestampDiffHours()).Seconds() {
-		return ginresp.SendAPIError(g, 400, apierr.TIMESTAMP_OUT_OF_RANGE, hl.NONE, fmt.Sprintf("The timestamp mus be within %d hours of now()", user.MaxTimestampDiffHours()), nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.TIMESTAMP_OUT_OF_RANGE, hl.NONE, fmt.Sprintf("The timestamp mus be within %d hours of now()", user.MaxTimestampDiffHours()), nil))
 	}
 
 	if UserMessageID != nil {
 		msg, err := h.database.GetMessageByUserMessageID(ctx, *UserMessageID)
 		if err != nil {
-			return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query existing message", err)
+			return nil, langext.Ptr(ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query existing message", err))
 		}
 		if msg != nil {
 			//the found message can be deleted (!), but we still return NO_ERROR here...
-			return ctx.FinishSuccess(ginresp.JSON(http.StatusOK, response{
-				Success:        true,
-				ErrorID:        apierr.NO_ERROR,
-				ErrorHighlight: -1,
-				Message:        "Message already sent",
-				SuppressSend:   true,
-				MessageCount:   user.MessagesSent,
-				Quota:          user.QuotaUsedToday(),
-				IsPro:          user.IsPro,
-				QuotaMax:       user.QuotaPerDay(),
-				SCNMessageID:   msg.MessageID,
-			}))
+			return &SendMessageResponse{
+				User:         user,
+				Message:      *msg,
+				MessageIsOld: true,
+			}, nil
 		}
 	}
 
 	if user.QuotaRemainingToday() <= 0 {
-		return ginresp.SendAPIError(g, 403, apierr.QUOTA_REACHED, hl.NONE, fmt.Sprintf("Daily quota reached (%d)", user.QuotaPerDay()), nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 403, apierr.QUOTA_REACHED, hl.NONE, fmt.Sprintf("Daily quota reached (%d)", user.QuotaPerDay()), nil))
 	}
 
 	var channel models.Channel
@@ -185,10 +214,10 @@ func (h MessageHandler) sendMessageInternal(g *gin.Context, ctx *logic.AppContex
 
 		foreignChan, err := h.database.GetChannelByNameAndSendKey(ctx, channelInternalName, *ChanKey)
 		if err != nil {
-			return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query (foreign) channel", err)
+			return nil, langext.Ptr(ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query (foreign) channel", err))
 		}
 		if foreignChan == nil {
-			return ginresp.SendAPIError(g, 400, apierr.CHANNEL_NOT_FOUND, hl.CHANNEL, "(Foreign) Channel not found", err)
+			return nil, langext.Ptr(ginresp.SendAPIError(g, 400, apierr.CHANNEL_NOT_FOUND, hl.CHANNEL, "(Foreign) Channel not found", err))
 		}
 		channel = *foreignChan
 	} else {
@@ -196,7 +225,7 @@ func (h MessageHandler) sendMessageInternal(g *gin.Context, ctx *logic.AppContex
 
 		channel, err = h.app.GetOrCreateChannel(ctx, *UserID, channelDisplayName, channelInternalName)
 		if err != nil {
-			return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query/create (owned) channel", err)
+			return nil, langext.Ptr(ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query/create (owned) channel", err))
 		}
 	}
 
@@ -205,7 +234,7 @@ func (h MessageHandler) sendMessageInternal(g *gin.Context, ctx *logic.AppContex
 	forgChanSend := *UserID != channel.OwnerUserID && ChanKey != nil && *ChanKey == channel.SendKey
 
 	if !selfChanAdmin && !selfChanSend && !forgChanSend {
-		return ginresp.SendAPIError(g, 401, apierr.USER_AUTH_FAILED, hl.USER_KEY, "You are not authorized for this action", nil)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 401, apierr.USER_AUTH_FAILED, hl.USER_KEY, "You are not authorized for this action", nil))
 	}
 
 	var sendTimestamp *time.Time = nil
@@ -219,28 +248,28 @@ func (h MessageHandler) sendMessageInternal(g *gin.Context, ctx *logic.AppContex
 
 	msg, err := h.database.CreateMessage(ctx, *UserID, channel, sendTimestamp, *Title, Content, priority, UserMessageID, clientIP, SenderName)
 	if err != nil {
-		return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to create message in db", err)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to create message in db", err))
 	}
 
 	subscriptions, err := h.database.ListSubscriptionsByChannel(ctx, channel.ChannelID)
 	if err != nil {
-		return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query subscriptions", err)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query subscriptions", err))
 	}
 
 	err = h.database.IncUserMessageCounter(ctx, user)
 	if err != nil {
-		return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to inc user msg-counter", err)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to inc user msg-counter", err))
 	}
 
 	err = h.database.IncChannelMessageCounter(ctx, channel)
 	if err != nil {
-		return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to inc channel msg-counter", err)
+		return nil, langext.Ptr(ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to inc channel msg-counter", err))
 	}
 
 	for _, sub := range subscriptions {
 		clients, err := h.database.ListClients(ctx, sub.SubscriberUserID)
 		if err != nil {
-			return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query clients", err)
+			return nil, langext.Ptr(ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to query clients", err))
 		}
 
 		if !sub.Confirmed {
@@ -253,28 +282,21 @@ func (h MessageHandler) sendMessageInternal(g *gin.Context, ctx *logic.AppContex
 			if err != nil {
 				_, err = h.database.CreateRetryDelivery(ctx, client, msg)
 				if err != nil {
-					return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to create delivery", err)
+					return nil, langext.Ptr(ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to create delivery", err))
 				}
 			} else {
 				_, err = h.database.CreateSuccessDelivery(ctx, client, msg, *fcmDelivID)
 				if err != nil {
-					return ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to create delivery", err)
+					return nil, langext.Ptr(ginresp.SendAPIError(g, 500, apierr.DATABASE_ERROR, hl.NONE, "Failed to create delivery", err))
 				}
 			}
 
 		}
 	}
 
-	return ctx.FinishSuccess(ginresp.JSON(http.StatusOK, response{
-		Success:        true,
-		ErrorID:        apierr.NO_ERROR,
-		ErrorHighlight: -1,
-		Message:        "Message sent",
-		SuppressSend:   false,
-		MessageCount:   user.MessagesSent + 1,
-		Quota:          user.QuotaUsedToday() + 1,
-		IsPro:          user.IsPro,
-		QuotaMax:       user.QuotaPerDay(),
-		SCNMessageID:   msg.MessageID,
-	}))
+	return &SendMessageResponse{
+		User:         user,
+		Message:      msg,
+		MessageIsOld: false,
+	}, nil
 }
diff --git a/scnserver/db/impl/primary/deliveries.go b/scnserver/db/impl/primary/deliveries.go
index a85055d..af66ea8 100644
--- a/scnserver/db/impl/primary/deliveries.go
+++ b/scnserver/db/impl/primary/deliveries.go
@@ -93,7 +93,7 @@ func (db *Database) ListRetrieableDeliveries(ctx TxContext, pageSize int) ([]mod
 		return nil, err
 	}
 
-	rows, err := tx.Query(ctx, "SELECT * FROM deliveries WHERE status = 'RETRY' AND next_delivery < :next LIMIT :lim ORDER BY next_delivery ASC", sq.PP{
+	rows, err := tx.Query(ctx, "SELECT * FROM deliveries WHERE status = 'RETRY' AND next_delivery < :next ORDER BY next_delivery ASC LIMIT :lim", sq.PP{
 		"next": time2DB(time.Now()),
 		"lim":  pageSize,
 	})
diff --git a/scnserver/db/impl/requests/requestlogs.go b/scnserver/db/impl/requests/requestlogs.go
index d451185..e7daf9d 100644
--- a/scnserver/db/impl/requests/requestlogs.go
+++ b/scnserver/db/impl/requests/requestlogs.go
@@ -66,8 +66,8 @@ func (db *Database) InsertRequestLog(ctx context.Context, requestid models.Reque
 }
 
 func (db *Database) Cleanup(ctx context.Context, count int, duration time.Duration) (int64, error) {
-	res1, err := db.db.Exec(ctx, "DELETE FROM requests WHERE request_id NOT IN ( SELECT request_id FROM requests ORDER BY timestamp_created DESC LIMIT :lim ) ", sq.PP{
-		"lim": count,
+	res1, err := db.db.Exec(ctx, "DELETE FROM requests WHERE request_id NOT IN ( SELECT request_id FROM requests ORDER BY timestamp_created DESC LIMIT :keep ) ", sq.PP{
+		"keep": count,
 	})
 	if err != nil {
 		return 0, err
diff --git a/scnserver/swagger/swagger.json b/scnserver/swagger/swagger.json
index 9b1548f..47071df 100644
--- a/scnserver/swagger/swagger.json
+++ b/scnserver/swagger/swagger.json
@@ -160,7 +160,7 @@
                     "200": {
                         "description": "OK",
                         "schema": {
-                            "$ref": "#/definitions/handler.sendMessageInternal.response"
+                            "$ref": "#/definitions/handler.SendMessage.response"
                         }
                     },
                     "400": {
@@ -245,6 +245,12 @@
                 "responses": {
                     "200": {
                         "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/handler.Ack.response"
+                        }
+                    },
+                    "default": {
+                        "description": "",
                         "schema": {
                             "$ref": "#/definitions/ginresp.compatAPIError"
                         }
@@ -330,6 +336,12 @@
                 "responses": {
                     "200": {
                         "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/handler.Expand.response"
+                        }
+                    },
+                    "default": {
+                        "description": "",
                         "schema": {
                             "$ref": "#/definitions/ginresp.compatAPIError"
                         }
@@ -401,6 +413,12 @@
                 "responses": {
                     "200": {
                         "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/handler.Info.response"
+                        }
+                    },
+                    "default": {
+                        "description": "",
                         "schema": {
                             "$ref": "#/definitions/ginresp.compatAPIError"
                         }
@@ -732,6 +750,12 @@
                 "responses": {
                     "200": {
                         "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/handler.Register.response"
+                        }
+                    },
+                    "default": {
+                        "description": "",
                         "schema": {
                             "$ref": "#/definitions/ginresp.compatAPIError"
                         }
@@ -780,6 +804,12 @@
                 "responses": {
                     "200": {
                         "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/handler.Requery.response"
+                        }
+                    },
+                    "default": {
+                        "description": "",
                         "schema": {
                             "$ref": "#/definitions/ginresp.compatAPIError"
                         }
@@ -880,6 +910,12 @@
                 "responses": {
                     "200": {
                         "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/handler.Update.response"
+                        }
+                    },
+                    "default": {
+                        "description": "",
                         "schema": {
                             "$ref": "#/definitions/ginresp.compatAPIError"
                         }
@@ -964,6 +1000,12 @@
                 "responses": {
                     "200": {
                         "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/handler.Upgrade.response"
+                        }
+                    },
+                    "default": {
+                        "description": "",
                         "schema": {
                             "$ref": "#/definitions/ginresp.compatAPIError"
                         }
@@ -2182,7 +2224,7 @@
                     "200": {
                         "description": "OK",
                         "schema": {
-                            "$ref": "#/definitions/handler.sendMessageInternal.response"
+                            "$ref": "#/definitions/handler.SendMessage.response"
                         }
                     },
                     "400": {
@@ -2296,7 +2338,7 @@
                     "200": {
                         "description": "OK",
                         "schema": {
-                            "$ref": "#/definitions/handler.sendMessageInternal.response"
+                            "$ref": "#/definitions/handler.SendMessageCompat.response"
                         }
                     },
                     "400": {
@@ -2695,6 +2737,76 @@
                 }
             }
         },
+        "handler.SendMessage.response": {
+            "type": "object",
+            "properties": {
+                "errhighlight": {
+                    "type": "integer"
+                },
+                "error": {
+                    "type": "integer"
+                },
+                "is_pro": {
+                    "type": "boolean"
+                },
+                "message": {
+                    "type": "string"
+                },
+                "messagecount": {
+                    "type": "integer"
+                },
+                "quota": {
+                    "type": "integer"
+                },
+                "quota_max": {
+                    "type": "integer"
+                },
+                "scn_msg_id": {
+                    "type": "string"
+                },
+                "success": {
+                    "type": "boolean"
+                },
+                "suppress_send": {
+                    "type": "boolean"
+                }
+            }
+        },
+        "handler.SendMessageCompat.response": {
+            "type": "object",
+            "properties": {
+                "errhighlight": {
+                    "type": "integer"
+                },
+                "error": {
+                    "type": "integer"
+                },
+                "is_pro": {
+                    "type": "boolean"
+                },
+                "message": {
+                    "type": "string"
+                },
+                "messagecount": {
+                    "type": "integer"
+                },
+                "quota": {
+                    "type": "integer"
+                },
+                "quota_max": {
+                    "type": "integer"
+                },
+                "scn_msg_id": {
+                    "type": "integer"
+                },
+                "success": {
+                    "type": "boolean"
+                },
+                "suppress_send": {
+                    "type": "boolean"
+                }
+            }
+        },
         "handler.Sleep.response": {
             "type": "object",
             "properties": {
@@ -2803,41 +2915,6 @@
                 }
             }
         },
-        "handler.sendMessageInternal.response": {
-            "type": "object",
-            "properties": {
-                "errhighlight": {
-                    "type": "integer"
-                },
-                "error": {
-                    "type": "integer"
-                },
-                "is_pro": {
-                    "type": "boolean"
-                },
-                "message": {
-                    "type": "string"
-                },
-                "messagecount": {
-                    "type": "integer"
-                },
-                "quota": {
-                    "type": "integer"
-                },
-                "quota_max": {
-                    "type": "integer"
-                },
-                "scn_msg_id": {
-                    "type": "string"
-                },
-                "success": {
-                    "type": "boolean"
-                },
-                "suppress_send": {
-                    "type": "boolean"
-                }
-            }
-        },
         "models.ChannelWithSubscriptionJSON": {
             "type": "object",
             "properties": {
diff --git a/scnserver/swagger/swagger.yaml b/scnserver/swagger/swagger.yaml
index 36e4b37..02ecd46 100644
--- a/scnserver/swagger/swagger.yaml
+++ b/scnserver/swagger/swagger.yaml
@@ -243,6 +243,52 @@ definitions:
         example: P3TNH8mvv14fm
         type: string
     type: object
+  handler.SendMessage.response:
+    properties:
+      errhighlight:
+        type: integer
+      error:
+        type: integer
+      is_pro:
+        type: boolean
+      message:
+        type: string
+      messagecount:
+        type: integer
+      quota:
+        type: integer
+      quota_max:
+        type: integer
+      scn_msg_id:
+        type: string
+      success:
+        type: boolean
+      suppress_send:
+        type: boolean
+    type: object
+  handler.SendMessageCompat.response:
+    properties:
+      errhighlight:
+        type: integer
+      error:
+        type: integer
+      is_pro:
+        type: boolean
+      message:
+        type: string
+      messagecount:
+        type: integer
+      quota:
+        type: integer
+      quota_max:
+        type: integer
+      scn_msg_id:
+        type: integer
+      success:
+        type: boolean
+      suppress_send:
+        type: boolean
+    type: object
   handler.Sleep.response:
     properties:
       duration:
@@ -313,29 +359,6 @@ definitions:
       uri:
         type: string
     type: object
-  handler.sendMessageInternal.response:
-    properties:
-      errhighlight:
-        type: integer
-      error:
-        type: integer
-      is_pro:
-        type: boolean
-      message:
-        type: string
-      messagecount:
-        type: integer
-      quota:
-        type: integer
-      quota_max:
-        type: integer
-      scn_msg_id:
-        type: string
-      success:
-        type: boolean
-      suppress_send:
-        type: boolean
-    type: object
   models.ChannelWithSubscriptionJSON:
     properties:
       channel_id:
@@ -618,7 +641,7 @@ paths:
         "200":
           description: OK
           schema:
-            $ref: '#/definitions/handler.sendMessageInternal.response'
+            $ref: '#/definitions/handler.SendMessage.response'
         "400":
           description: Bad Request
           schema:
@@ -677,6 +700,10 @@ paths:
       responses:
         "200":
           description: OK
+          schema:
+            $ref: '#/definitions/handler.Ack.response'
+        default:
+          description: ""
           schema:
             $ref: '#/definitions/ginresp.compatAPIError'
       summary: Acknowledge that a message was received
@@ -735,6 +762,10 @@ paths:
       responses:
         "200":
           description: OK
+          schema:
+            $ref: '#/definitions/handler.Expand.response'
+        default:
+          description: ""
           schema:
             $ref: '#/definitions/ginresp.compatAPIError'
       summary: Get a whole (potentially truncated) message
@@ -783,6 +814,10 @@ paths:
       responses:
         "200":
           description: OK
+          schema:
+            $ref: '#/definitions/handler.Info.response'
+        default:
+          description: ""
           schema:
             $ref: '#/definitions/ginresp.compatAPIError'
       summary: Get information about the current user
@@ -1011,6 +1046,10 @@ paths:
       responses:
         "200":
           description: OK
+          schema:
+            $ref: '#/definitions/handler.Register.response'
+        default:
+          description: ""
           schema:
             $ref: '#/definitions/ginresp.compatAPIError'
       summary: Register a new account
@@ -1044,6 +1083,10 @@ paths:
       responses:
         "200":
           description: OK
+          schema:
+            $ref: '#/definitions/handler.Requery.response'
+        default:
+          description: ""
           schema:
             $ref: '#/definitions/ginresp.compatAPIError'
       summary: Return all not-acknowledged messages
@@ -1112,6 +1155,10 @@ paths:
       responses:
         "200":
           description: OK
+          schema:
+            $ref: '#/definitions/handler.Update.response'
+        default:
+          description: ""
           schema:
             $ref: '#/definitions/ginresp.compatAPIError'
       summary: Set the fcm-token (android)
@@ -1171,6 +1218,10 @@ paths:
       responses:
         "200":
           description: OK
+          schema:
+            $ref: '#/definitions/handler.Upgrade.response'
+        default:
+          description: ""
           schema:
             $ref: '#/definitions/ginresp.compatAPIError'
       summary: Upgrade a free account to a paid account
@@ -2002,7 +2053,7 @@ paths:
         "200":
           description: OK
           schema:
-            $ref: '#/definitions/handler.sendMessageInternal.response'
+            $ref: '#/definitions/handler.SendMessage.response'
         "400":
           description: Bad Request
           schema:
@@ -2075,7 +2126,7 @@ paths:
         "200":
           description: OK
           schema:
-            $ref: '#/definitions/handler.sendMessageInternal.response'
+            $ref: '#/definitions/handler.SendMessageCompat.response'
         "400":
           description: Bad Request
           schema:
diff --git a/scnserver/test/compat_test.go b/scnserver/test/compat_test.go
index 3d8a4f9..1084ba9 100644
--- a/scnserver/test/compat_test.go
+++ b/scnserver/test/compat_test.go
@@ -1,5 +1,28 @@
 package test
 
+import (
+	tt "blackforestbytes.com/simplecloudnotifier/test/util"
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"testing"
+)
+
+func TestCreateCompatUser(t *testing.T) {
+	_, baseUrl, stop := tt.StartSimpleWebserver(t)
+	defer stop()
+
+	r0 := tt.RequestGet[gin.H](t, baseUrl, fmt.Sprintf("/api/register.php?fcm_token=%s&pro=%s&pro_token=%s", "DUMMY_FCM", "0", ""))
+
+	tt.AssertEqual(t, "success", true, r0["success"])
+
+	userid := int64(r0["user_id"].(float64))
+	userkey := r0["user_key"].(string)
+
+	r1 := tt.RequestGet[gin.H](t, baseUrl, fmt.Sprintf("/api/info.php?user_id=%d&user_key=%s", userid, userkey))
+
+	tt.AssertEqual(t, "success", true, r1["success"])
+}
+
 //TODO test compat methods
 
 //TODO also test compat_id mapping