diff --git a/apps/shared/OpenClawKit/Sources/OpenClawProtocol/GatewayModels.swift b/apps/shared/OpenClawKit/Sources/OpenClawProtocol/GatewayModels.swift
index a76a0cf300f9..9b3b25ddca87 100644
--- a/apps/shared/OpenClawKit/Sources/OpenClawProtocol/GatewayModels.swift
+++ b/apps/shared/OpenClawKit/Sources/OpenClawProtocol/GatewayModels.swift
@@ -595,6 +595,9 @@ public struct SendParams: Codable, Sendable {
     public let message: String?
     public let mediaurl: String?
     public let mediaurls: [String]?
+    public let buffer: String?
+    public let filename: String?
+    public let contenttype: String?
     public let asvoice: Bool?
     public let gifplayback: Bool?
     public let channel: String?
@@ -613,6 +616,9 @@ public struct SendParams: Codable, Sendable {
         message: String?,
         mediaurl: String?,
         mediaurls: [String]?,
+        buffer: String?,
+        filename: String?,
+        contenttype: String?,
         asvoice: Bool?,
         gifplayback: Bool?,
         channel: String?,
@@ -630,6 +636,9 @@ public struct SendParams: Codable, Sendable {
         self.message = message
         self.mediaurl = mediaurl
         self.mediaurls = mediaurls
+        self.buffer = buffer
+        self.filename = filename
+        self.contenttype = contenttype
         self.asvoice = asvoice
         self.gifplayback = gifplayback
         self.channel = channel
@@ -649,6 +658,9 @@ public struct SendParams: Codable, Sendable {
         case message
         case mediaurl = "mediaUrl"
         case mediaurls = "mediaUrls"
+        case buffer
+        case filename
+        case contenttype = "contentType"
         case asvoice = "asVoice"
         case gifplayback = "gifPlayback"
         case channel