diff --git a/ruma-client-api/src/r0/membership/ban_user.rs b/ruma-client-api/src/r0/membership/ban_user.rs
index 54dbda5f..fd01a149 100644
--- a/ruma-client-api/src/r0/membership/ban_user.rs
+++ b/ruma-client-api/src/r0/membership/ban_user.rs
@@ -13,20 +13,36 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {
         /// The room to kick the user from.
         #[ruma_api(path)]
-        pub room_id: RoomId,
+        pub room_id: &'a RoomId,
 
         /// The user to ban.
-        pub user_id: UserId,
+        pub user_id: &'a UserId,
 
         /// The reason for banning the user.
         #[serde(skip_serializing_if = "Option::is_none")]
-        pub reason: Option<String>,
+        pub reason: Option<&'a str>,
     }
 
+    #[non_exhaustive]
     response: {}
 
     error: crate::Error
 }
+
+impl<'a> Request<'a> {
+    /// Creates a new `Request` with the given room id and room id.
+    pub fn new(room_id: &'a RoomId, user_id: &'a UserId) -> Self {
+        Self { room_id, user_id, reason: None }
+    }
+}
+
+impl Response {
+    /// Creates an empty `Response`.
+    pub fn new() -> Self {
+        Self
+    }
+}
diff --git a/ruma-client-api/src/r0/membership/forget_room.rs b/ruma-client-api/src/r0/membership/forget_room.rs
index 93b11867..28c4194e 100644
--- a/ruma-client-api/src/r0/membership/forget_room.rs
+++ b/ruma-client-api/src/r0/membership/forget_room.rs
@@ -13,13 +13,29 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {
         /// The room to forget.
         #[ruma_api(path)]
-        pub room_id: RoomId,
+        pub room_id: &'a RoomId,
     }
 
+    #[non_exhaustive]
     response: {}
 
     error: crate::Error
 }
+
+impl<'a> Request<'a> {
+    /// Creates a new `Request` with the given room id.
+    pub fn new(room_id: &'a RoomId) -> Self {
+        Self { room_id }
+    }
+}
+
+impl Response {
+    /// Creates an empty `Response`.
+    pub fn new() -> Self {
+        Self
+    }
+}
diff --git a/ruma-client-api/src/r0/membership/kick_user.rs b/ruma-client-api/src/r0/membership/kick_user.rs
index 19a15639..c97e6553 100644
--- a/ruma-client-api/src/r0/membership/kick_user.rs
+++ b/ruma-client-api/src/r0/membership/kick_user.rs
@@ -13,20 +13,36 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {
         /// The room to kick the user from.
         #[ruma_api(path)]
-        pub room_id: RoomId,
+        pub room_id: &'a RoomId,
 
         /// The user to kick.
-        pub user_id: UserId,
+        pub user_id: &'a UserId,
 
         /// The reason for kicking the user.
         #[serde(skip_serializing_if = "Option::is_none")]
-        pub reason: Option<String>,
+        pub reason: Option<&'a str>,
     }
 
+    #[non_exhaustive]
     response: {}
 
     error: crate::Error
 }
+
+impl<'a> Request<'a> {
+    /// Creates a new `Request` with the given room id and room id.
+    pub fn new(room_id: &'a RoomId, user_id: &'a UserId) -> Self {
+        Self { room_id, user_id, reason: None }
+    }
+}
+
+impl Response {
+    /// Creates an empty `Response`.
+    pub fn new() -> Self {
+        Self
+    }
+}
diff --git a/ruma-client-api/src/r0/membership/unban_user.rs b/ruma-client-api/src/r0/membership/unban_user.rs
index ba1d6eab..c30dd51f 100644
--- a/ruma-client-api/src/r0/membership/unban_user.rs
+++ b/ruma-client-api/src/r0/membership/unban_user.rs
@@ -13,16 +13,32 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {
         /// The room to unban the user from.
         #[ruma_api(path)]
-        pub room_id: RoomId,
+        pub room_id: &'a RoomId,
 
         /// The user to unban.
-        pub user_id: UserId,
+        pub user_id: &'a UserId,
     }
 
+    #[non_exhaustive]
     response: {}
 
     error: crate::Error
 }
+
+impl<'a> Request<'a> {
+    /// Creates a new `Request` with the given room id and room id.
+    pub fn new(room_id: &'a RoomId, user_id: &'a UserId) -> Self {
+        Self { room_id, user_id }
+    }
+}
+
+impl Response {
+    /// Creates an empty `Response`.
+    pub fn new() -> Self {
+        Self
+    }
+}