diff --git a/ruma-client-api/src/r0/thirdparty/get_location_for_protocol.rs b/ruma-client-api/src/r0/thirdparty/get_location_for_protocol.rs
index d5356a02..22bfb23f 100644
--- a/ruma-client-api/src/r0/thirdparty/get_location_for_protocol.rs
+++ b/ruma-client-api/src/r0/thirdparty/get_location_for_protocol.rs
@@ -15,10 +15,11 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {
         /// The protocol used to communicate to the third party network.
         #[ruma_api(path)]
-        pub protocol: String,
+        pub protocol: &'a str,
 
         /// One or more custom fields to help identify the third party location.
         // The specification is incorrect for this parameter. See matrix-org/matrix-doc#2352.
@@ -26,6 +27,7 @@ ruma_api! {
         pub fields: BTreeMap<String, String>,
     }
 
+    #[non_exhaustive]
     response: {
         /// List of matched third party locations.
         #[ruma_api(body)]
@@ -34,3 +36,17 @@ ruma_api! {
 
     error: crate::Error
 }
+
+impl<'a> Request<'a> {
+    /// Creates a new `Request` with the given protocol.
+    pub fn new(protocol: &'a str) -> Self {
+        Self { protocol, fields: BTreeMap::new() }
+    }
+}
+
+impl Response {
+    /// Creates a new `Response` with the given locations.
+    pub fn new(locations: Vec<Location>) -> Self {
+        Self { locations }
+    }
+}
diff --git a/ruma-client-api/src/r0/thirdparty/get_location_for_room_alias.rs b/ruma-client-api/src/r0/thirdparty/get_location_for_room_alias.rs
index 7ec7d1a1..50b4763c 100644
--- a/ruma-client-api/src/r0/thirdparty/get_location_for_room_alias.rs
+++ b/ruma-client-api/src/r0/thirdparty/get_location_for_room_alias.rs
@@ -14,12 +14,14 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {
         /// The Matrix room alias to look up.
         #[ruma_api(query)]
-        pub alias: RoomAliasId,
+        pub alias: &'a RoomAliasId,
     }
 
+    #[non_exhaustive]
     response: {
         /// List of matched third party locations.
         #[ruma_api(body)]
@@ -28,3 +30,17 @@ ruma_api! {
 
     error: crate::Error
 }
+
+impl<'a> Request<'a> {
+    /// Creates a new `Request` with the given room alias ID.
+    pub fn new(alias: &'a RoomAliasId) -> Self {
+        Self { alias }
+    }
+}
+
+impl Response {
+    /// Creates a new `Reponse` with the given locations.
+    pub fn new(locations: Vec<Location>) -> Self {
+        Self { locations }
+    }
+}
diff --git a/ruma-client-api/src/r0/thirdparty/get_protocol.rs b/ruma-client-api/src/r0/thirdparty/get_protocol.rs
index 5d759d6b..11feb3f4 100644
--- a/ruma-client-api/src/r0/thirdparty/get_protocol.rs
+++ b/ruma-client-api/src/r0/thirdparty/get_protocol.rs
@@ -13,12 +13,14 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {
         /// The name of the protocol.
         #[ruma_api(path)]
-        pub protocol: String,
+        pub protocol: &'a str,
     }
 
+    #[non_exhaustive]
     response: {
         /// Metadata about the protocol.
         #[ruma_api(body)]
@@ -27,3 +29,17 @@ ruma_api! {
 
     error: crate::Error
 }
+
+impl<'a> Request<'a> {
+    /// Creates a new `Request` with the given protocol name.
+    pub fn new(protocol: &'a str) -> Self {
+        Self { protocol }
+    }
+}
+
+impl Response {
+    /// Creates a new `Response` with the given procotol.
+    pub fn new(protocol: Protocol) -> Self {
+        Self { protocol }
+    }
+}
diff --git a/ruma-client-api/src/r0/thirdparty/get_protocols.rs b/ruma-client-api/src/r0/thirdparty/get_protocols.rs
index d7764aae..3b70264c 100644
--- a/ruma-client-api/src/r0/thirdparty/get_protocols.rs
+++ b/ruma-client-api/src/r0/thirdparty/get_protocols.rs
@@ -15,8 +15,11 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[derive(Default)]
+    #[non_exhaustive]
     request: {}
 
+    #[non_exhaustive]
     response: {
         /// Metadata about protocols supported by the homeserver.
         #[ruma_api(body)]
@@ -25,3 +28,17 @@ 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 procotols.
+    pub fn new(protocols: BTreeMap<String, Protocol>) -> Self {
+        Self { protocols }
+    }
+}
diff --git a/ruma-client-api/src/r0/thirdparty/get_user_for_protocol.rs b/ruma-client-api/src/r0/thirdparty/get_user_for_protocol.rs
index 123828b7..dbb33544 100644
--- a/ruma-client-api/src/r0/thirdparty/get_user_for_protocol.rs
+++ b/ruma-client-api/src/r0/thirdparty/get_user_for_protocol.rs
@@ -15,10 +15,11 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {
         /// The protocol used to communicate to the third party network.
         #[ruma_api(path)]
-        pub protocol: String,
+        pub protocol: &'a str,
 
         /// One or more custom fields that are passed to the AS to help identify the user.
         // The specification is incorrect for this parameter. See matrix-org/matrix-doc#2352.
@@ -26,6 +27,7 @@ ruma_api! {
         pub fields: BTreeMap<String, String>,
     }
 
+    #[non_exhaustive]
     response: {
         /// List of matched third party users.
         #[ruma_api(body)]
@@ -34,3 +36,17 @@ ruma_api! {
 
     error: crate::Error
 }
+
+impl<'a> Request<'a> {
+    /// Creates a new `Request` with the given protocol.
+    pub fn new(protocol: &'a str) -> Self {
+        Self { protocol, fields: BTreeMap::new() }
+    }
+}
+
+impl Response {
+    /// Creates a new `Response` with the given users.
+    pub fn new(users: Vec<User>) -> Self {
+        Self { users }
+    }
+}
diff --git a/ruma-client-api/src/r0/thirdparty/get_user_for_user_id.rs b/ruma-client-api/src/r0/thirdparty/get_user_for_user_id.rs
index fe1e4b88..91440774 100644
--- a/ruma-client-api/src/r0/thirdparty/get_user_for_user_id.rs
+++ b/ruma-client-api/src/r0/thirdparty/get_user_for_user_id.rs
@@ -14,12 +14,14 @@ ruma_api! {
         requires_authentication: true,
     }
 
+    #[non_exhaustive]
     request: {
         /// The Matrix User ID to look up.
         #[ruma_api(query)]
-        pub userid: UserId,
+        pub userid: &'a UserId,
     }
 
+    #[non_exhaustive]
     response: {
         /// List of matched third party users.
         #[ruma_api(body)]
@@ -28,3 +30,17 @@ ruma_api! {
 
     error: crate::Error
 }
+
+impl<'a> Request<'a> {
+    /// Creates a new `Request` with the given user ID.
+    pub fn new(userid: &'a UserId) -> Self {
+        Self { userid }
+    }
+}
+
+impl Response {
+    /// Creates a new `Response` with the given users.
+    pub fn new(users: Vec<User>) -> Self {
+        Self { users }
+    }
+}