diff --git a/api/message.go b/api/message.go
index 185e31e9..ca818109 100644
--- a/api/message.go
+++ b/api/message.go
@@ -345,7 +345,7 @@ func (a *MessageAPI) DeleteMessage(ctx *gin.Context) {
 //	  description: the message to add
 //	  required: true
 //	  schema:
-//	    $ref: "#/definitions/Message"
+//	    $ref: "#/definitions/CreateMessage"
 //	responses:
 //	  200:
 //	    description: Ok
@@ -364,7 +364,7 @@ func (a *MessageAPI) DeleteMessage(ctx *gin.Context) {
 //	    schema:
 //	        $ref: "#/definitions/Error"
 func (a *MessageAPI) CreateMessage(ctx *gin.Context) {
-	message := model.MessageExternal{}
+	message := model.CreateMessage{}
 	if err := ctx.Bind(&message); err != nil {
 		return
 	}
@@ -395,8 +395,6 @@ func (a *MessageAPI) CreateMessage(ctx *gin.Context) {
 		message.Priority = &app.DefaultPriority
 	}
 
-	message.Date = timeNow()
-	message.ID = 0
 	msgInternal := toInternalMessage(&message)
 	if success := successOrAbort(ctx, 500, a.DB.CreateMessage(msgInternal)); !success {
 		return
@@ -405,13 +403,12 @@ func (a *MessageAPI) CreateMessage(ctx *gin.Context) {
 	ctx.JSON(200, toExternalMessage(msgInternal))
 }
 
-func toInternalMessage(msg *model.MessageExternal) *model.Message {
+func toInternalMessage(msg *model.CreateMessage) *model.Message {
 	res := &model.Message{
-		ID:            msg.ID,
 		ApplicationID: msg.ApplicationID,
 		Message:       msg.Message,
 		Title:         msg.Title,
-		Date:          msg.Date,
+		Date:          timeNow(),
 	}
 	if msg.Priority != nil {
 		res.Priority = *msg.Priority
diff --git a/docs/spec.json b/docs/spec.json
index 41059517..38261bb1 100644
--- a/docs/spec.json
+++ b/docs/spec.json
@@ -1558,7 +1558,7 @@
             "in": "body",
             "required": true,
             "schema": {
-              "$ref": "#/definitions/Message"
+              "$ref": "#/definitions/CreateMessage"
             }
           }
         ],
@@ -2746,6 +2746,57 @@
       },
       "x-go-package": "github.com/gotify/server/v2/api"
     },
+    "CreateMessage": {
+      "description": "The CreateMessage holds information about a message that will be sent.",
+      "type": "object",
+      "title": "CreateMessage Model",
+      "required": [
+        "message"
+      ],
+      "properties": {
+        "appid": {
+          "description": "The application id that send this message. Always set when returned via the API.",
+          "type": "integer",
+          "format": "int64",
+          "x-go-name": "ApplicationID",
+          "example": 5
+        },
+        "extras": {
+          "description": "The extra data sent along the message.\n\nThe extra fields are stored in a key-value scheme. Only accepted in CreateMessage requests with application/json content-type.\n\nThe keys should be in the following format: \u0026lt;top-namespace\u0026gt;::[\u0026lt;sub-namespace\u0026gt;::]\u0026lt;action\u0026gt;\n\nThese namespaces are reserved and might be used in the official clients: gotify android ios web server client. Do not use them for other purposes.",
+          "type": "object",
+          "additionalProperties": {},
+          "x-go-name": "Extras",
+          "example": {
+            "home::appliances::lighting::on": {
+              "brightness": 15
+            },
+            "home::appliances::thermostat::change_temperature": {
+              "temperature": 23
+            }
+          }
+        },
+        "message": {
+          "description": "The message. Markdown (excluding html) is allowed.",
+          "type": "string",
+          "x-go-name": "Message",
+          "example": "**Backup** was successfully finished."
+        },
+        "priority": {
+          "description": "The priority of the message. If unset, then the default priority of the\napplication will be used.",
+          "type": "integer",
+          "format": "int64",
+          "x-go-name": "Priority",
+          "example": 2
+        },
+        "title": {
+          "description": "The title of the message.",
+          "type": "string",
+          "x-go-name": "Title",
+          "example": "Backup"
+        }
+      },
+      "x-go-package": "github.com/gotify/server/v2/model"
+    },
     "CreateUserExternal": {
       "description": "Used for user creation.",
       "type": "object",
diff --git a/model/message.go b/model/message.go
index 57a6c9f9..6f75fe27 100644
--- a/model/message.go
+++ b/model/message.go
@@ -64,3 +64,39 @@ type MessageExternal struct {
 	// example: 2018-02-27T19:36:10.5045044+01:00
 	Date time.Time `json:"date"`
 }
+
+// CreateMessage Model
+//
+// The CreateMessage holds information about a message that will be sent.
+//
+// swagger:model CreateMessage
+type CreateMessage struct {
+	// The application id that send this message. Always set when returned via the API.
+	//
+	// example: 5
+	ApplicationID uint `json:"appid"`
+	// The message. Markdown (excluding html) is allowed.
+	//
+	// required: true
+	// example: **Backup** was successfully finished.
+	Message string `form:"message" query:"message" json:"message" binding:"required"`
+	// The title of the message.
+	//
+	// example: Backup
+	Title string `form:"title" query:"title" json:"title"`
+	// The priority of the message. If unset, then the default priority of the
+	// application will be used.
+	//
+	// example: 2
+	Priority *int `form:"priority" query:"priority" json:"priority"`
+	// The extra data sent along the message.
+	//
+	// The extra fields are stored in a key-value scheme. Only accepted in CreateMessage requests with application/json content-type.
+	//
+	// The keys should be in the following format: <top-namespace>::[<sub-namespace>::]<action>
+	//
+	// These namespaces are reserved and might be used in the official clients: gotify android ios web server client. Do not use them for other purposes.
+	//
+	// example: {"home::appliances::thermostat::change_temperature":{"temperature":23},"home::appliances::lighting::on":{"brightness":15}}
+	Extras map[string]any `form:"-" query:"-" json:"extras,omitempty"`
+}