diff --git a/ruma-client-api/src/r0/alias/create_alias.rs b/ruma-client-api/src/r0/alias/create_alias.rs
index 9863c2dc..bbb95e1f 100644
--- a/ruma-client-api/src/r0/alias/create_alias.rs
+++ b/ruma-client-api/src/r0/alias/create_alias.rs
@@ -13,6 +13,7 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {
         /// The room alias to set.
         #[ruma_api(path)]
@@ -22,7 +23,22 @@ ruma_api! {
         pub room_id: &'a RoomId,
     }
 
+    #[non_exhaustive]
     response: {}
 
     error: crate::Error
 }
+
+impl<'a> Request<'a> {
+    /// Creates a new `Request` with the given room alias and room id.
+    pub fn new(room_alias: &'a RoomAliasId, room_id: &'a RoomId) -> Self {
+        Self { room_alias, room_id }
+    }
+}
+
+impl Response {
+    /// Creates an empty `Response`.
+    pub fn new() -> Self {
+        Self
+    }
+}
diff --git a/ruma-client-api/src/r0/alias/delete_alias.rs b/ruma-client-api/src/r0/alias/delete_alias.rs
index 2a275713..79ac592f 100644
--- a/ruma-client-api/src/r0/alias/delete_alias.rs
+++ b/ruma-client-api/src/r0/alias/delete_alias.rs
@@ -13,13 +13,29 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {
         /// The room alias to remove.
         #[ruma_api(path)]
         pub room_alias: &'a RoomAliasId,
     }
 
+    #[non_exhaustive]
     response: {}
 
     error: crate::Error
 }
+
+impl<'a> Request<'a> {
+    /// Creates a new `Request` with the given room alias.
+    pub fn new(room_alias: &'a RoomAliasId) -> Self {
+        Self { room_alias }
+    }
+}
+
+impl Response {
+    /// Creates an empty `Response`.
+    pub fn new() -> Self {
+        Self
+    }
+}
diff --git a/ruma-client-api/src/r0/alias/get_alias.rs b/ruma-client-api/src/r0/alias/get_alias.rs
index 7ef3486e..cccdb27d 100644
--- a/ruma-client-api/src/r0/alias/get_alias.rs
+++ b/ruma-client-api/src/r0/alias/get_alias.rs
@@ -13,12 +13,14 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {
         /// The room alias.
         #[ruma_api(path)]
         pub room_alias: &'a RoomAliasId,
     }
 
+    #[non_exhaustive]
     response: {
         /// The room ID for this room alias.
         pub room_id: RoomId,
diff --git a/ruma-client-api/src/r0/room/create_room.rs b/ruma-client-api/src/r0/room/create_room.rs
index 557d5904..01ae0070 100644
--- a/ruma-client-api/src/r0/room/create_room.rs
+++ b/ruma-client-api/src/r0/room/create_room.rs
@@ -114,6 +114,13 @@ impl Request {
     }
 }
 
+impl Response {
+    /// Creates a `Response` with the given room id.
+    pub fn new(room_id: RoomId) -> Self {
+        Self { room_id }
+    }
+}
+
 /// Extra options to be added to the `m.room.create` event.
 ///
 /// This is the same as the event content struct for `m.room.create`, but without some fields that
diff --git a/ruma-client-api/src/r0/session/get_login_types.rs b/ruma-client-api/src/r0/session/get_login_types.rs
index 4447d359..aede69af 100644
--- a/ruma-client-api/src/r0/session/get_login_types.rs
+++ b/ruma-client-api/src/r0/session/get_login_types.rs
@@ -13,8 +13,10 @@ ruma_api! {
         requires_authentication: false,
     }
 
+    #[non_exhaustive]
     request: {}
 
+    #[non_exhaustive]
     response: {
         /// The homeserver's supported login types.
         pub flows: Vec<LoginType>
@@ -23,6 +25,20 @@ ruma_api! {
     error: crate::Error
 }
 
+impl Request {
+    /// Creates an empty `Request`.
+    pub fn new() -> Self {
+        Self
+    }
+}
+
+impl Response {
+    /// Creates a new `Response` with the given login types.
+    pub fn new(flows: Vec<LoginType>) -> Self {
+        Self { flows }
+    }
+}
+
 /// An authentication mechanism.
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Deserialize, Serialize)]
 #[serde(tag = "type")]
diff --git a/ruma-client-api/src/r0/session/logout.rs b/ruma-client-api/src/r0/session/logout.rs
index bc3f6067..921907ab 100644
--- a/ruma-client-api/src/r0/session/logout.rs
+++ b/ruma-client-api/src/r0/session/logout.rs
@@ -12,9 +12,25 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {}
 
+    #[non_exhaustive]
     response: {}
 
     error: crate::Error
 }
+
+impl Request {
+    /// Creates an empty `Request`.
+    pub fn new() -> Self {
+        Self
+    }
+}
+
+impl Response {
+    /// Creates an empty `Response`.
+    pub fn new() -> Self {
+        Self
+    }
+}
diff --git a/ruma-client-api/src/r0/session/logout_all.rs b/ruma-client-api/src/r0/session/logout_all.rs
index 5a92adda..b413e28b 100644
--- a/ruma-client-api/src/r0/session/logout_all.rs
+++ b/ruma-client-api/src/r0/session/logout_all.rs
@@ -12,9 +12,25 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {}
 
+    #[non_exhaustive]
     response: {}
 
     error: crate::Error
 }
+
+impl Request {
+    /// Creates an empty `Request`.
+    pub fn new() -> Self {
+        Self
+    }
+}
+
+impl Response {
+    /// Creates an empty `Response`.
+    pub fn new() -> Self {
+        Self
+    }
+}