diff --git a/crates/ruma-appservice-api/src/event/push_events.rs b/crates/ruma-appservice-api/src/event/push_events.rs
index ed84bda3..99693bca 100644
--- a/crates/ruma-appservice-api/src/event/push_events.rs
+++ b/crates/ruma-appservice-api/src/event/push_events.rs
@@ -71,13 +71,13 @@ pub mod v1 {
             next_batch: impl Into<String>,
         ) -> serde_json::Result<ruma_client_api::sync::sync_events::v3::Response> {
             use ruma_client_api::sync::sync_events;
-            use ruma_common::RoomId;
+            use ruma_common::OwnedRoomId;
             use serde::Deserialize;
             use tracing::warn;
 
             #[derive(Debug, Deserialize)]
             struct EventDeHelper {
-                room_id: Option<Box<RoomId>>,
+                room_id: Option<OwnedRoomId>,
             }
 
             let mut response = sync_events::v3::Response::new(next_batch.into());
diff --git a/crates/ruma-client-api/src/account/register.rs b/crates/ruma-client-api/src/account/register.rs
index f4473e8c..77cd1d9d 100644
--- a/crates/ruma-client-api/src/account/register.rs
+++ b/crates/ruma-client-api/src/account/register.rs
@@ -7,7 +7,7 @@ pub mod v3 {
     //!
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3register
 
-    use ruma_common::{api::ruma_api, DeviceId, UserId};
+    use ruma_common::{api::ruma_api, DeviceId, OwnedDeviceId, OwnedUserId};
 
     use super::{LoginType, RegistrationKind};
     use crate::uiaa::{AuthData, IncomingAuthData, UiaaResponse};
@@ -91,12 +91,12 @@ pub mod v3 {
             pub access_token: Option<String>,
 
             /// The fully-qualified Matrix ID that has been registered.
-            pub user_id: Box<UserId>,
+            pub user_id: OwnedUserId,
 
             /// ID of the registered device.
             ///
             /// Will be the same as the corresponding parameter in the request, if one was specified.
-            pub device_id: Option<Box<DeviceId>>,
+            pub device_id: Option<OwnedDeviceId>,
         }
 
         error: UiaaResponse
@@ -111,7 +111,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given user ID.
-        pub fn new(user_id: Box<UserId>) -> Self {
+        pub fn new(user_id: OwnedUserId) -> Self {
             Self { access_token: None, user_id, device_id: None }
         }
     }
diff --git a/crates/ruma-client-api/src/account/request_3pid_management_token_via_email.rs b/crates/ruma-client-api/src/account/request_3pid_management_token_via_email.rs
index 439ea4c1..6fb3c2ef 100644
--- a/crates/ruma-client-api/src/account/request_3pid_management_token_via_email.rs
+++ b/crates/ruma-client-api/src/account/request_3pid_management_token_via_email.rs
@@ -6,7 +6,7 @@ pub mod v3 {
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3account3pidemailrequesttoken
 
     use js_int::UInt;
-    use ruma_common::{api::ruma_api, ClientSecret, SessionId};
+    use ruma_common::{api::ruma_api, ClientSecret, OwnedSessionId};
 
     use crate::account::{IdentityServerInfo, IncomingIdentityServerInfo};
 
@@ -45,7 +45,7 @@ pub mod v3 {
 
         response: {
             /// The session identifier given by the identity server.
-            pub sid: Box<SessionId>,
+            pub sid: OwnedSessionId,
 
             /// URL to submit validation token to.
             ///
@@ -73,7 +73,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given session identifier.
-        pub fn new(sid: Box<SessionId>) -> Self {
+        pub fn new(sid: OwnedSessionId) -> Self {
             Self { sid, submit_url: None }
         }
     }
diff --git a/crates/ruma-client-api/src/account/request_3pid_management_token_via_msisdn.rs b/crates/ruma-client-api/src/account/request_3pid_management_token_via_msisdn.rs
index e3087b15..2e86fc62 100644
--- a/crates/ruma-client-api/src/account/request_3pid_management_token_via_msisdn.rs
+++ b/crates/ruma-client-api/src/account/request_3pid_management_token_via_msisdn.rs
@@ -6,7 +6,7 @@ pub mod v3 {
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3account3pidmsisdnrequesttoken
 
     use js_int::UInt;
-    use ruma_common::{api::ruma_api, ClientSecret, SessionId};
+    use ruma_common::{api::ruma_api, ClientSecret, OwnedSessionId};
 
     use crate::account::{IdentityServerInfo, IncomingIdentityServerInfo};
 
@@ -48,7 +48,7 @@ pub mod v3 {
 
         response: {
             /// The session identifier given by the identity server.
-            pub sid: Box<SessionId>,
+            pub sid: OwnedSessionId,
 
             /// URL to submit validation token to.
             ///
@@ -88,7 +88,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given session identifier.
-        pub fn new(sid: Box<SessionId>) -> Self {
+        pub fn new(sid: OwnedSessionId) -> Self {
             Self { sid, submit_url: None }
         }
     }
diff --git a/crates/ruma-client-api/src/account/request_openid_token.rs b/crates/ruma-client-api/src/account/request_openid_token.rs
index 60e66829..f5163793 100644
--- a/crates/ruma-client-api/src/account/request_openid_token.rs
+++ b/crates/ruma-client-api/src/account/request_openid_token.rs
@@ -7,7 +7,7 @@ pub mod v3 {
 
     use std::time::Duration;
 
-    use ruma_common::{api::ruma_api, authentication::TokenType, ServerName, UserId};
+    use ruma_common::{api::ruma_api, authentication::TokenType, OwnedServerName, UserId};
 
     ruma_api! {
         metadata: {
@@ -35,7 +35,7 @@ pub mod v3 {
             pub token_type: TokenType,
 
             /// Homeserver domain for verification of user's identity.
-            pub matrix_server_name: Box<ServerName>,
+            pub matrix_server_name: OwnedServerName,
 
             /// Seconds until token expiration.
             #[serde(with = "ruma_common::serde::duration::secs")]
@@ -58,7 +58,7 @@ pub mod v3 {
         pub fn new(
             access_token: String,
             token_type: TokenType,
-            matrix_server_name: Box<ServerName>,
+            matrix_server_name: OwnedServerName,
             expires_in: Duration,
         ) -> Self {
             Self { access_token, token_type, matrix_server_name, expires_in }
diff --git a/crates/ruma-client-api/src/account/request_password_change_token_via_email.rs b/crates/ruma-client-api/src/account/request_password_change_token_via_email.rs
index 85e1fe99..0b80c5e3 100644
--- a/crates/ruma-client-api/src/account/request_password_change_token_via_email.rs
+++ b/crates/ruma-client-api/src/account/request_password_change_token_via_email.rs
@@ -6,7 +6,7 @@ pub mod v3 {
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3accountpasswordemailrequesttoken
 
     use js_int::UInt;
-    use ruma_common::{api::ruma_api, ClientSecret, SessionId};
+    use ruma_common::{api::ruma_api, ClientSecret, OwnedSessionId};
 
     use crate::account::{IdentityServerInfo, IncomingIdentityServerInfo};
 
@@ -45,7 +45,7 @@ pub mod v3 {
 
         response: {
             /// The session identifier given by the identity server.
-            pub sid: Box<SessionId>,
+            pub sid: OwnedSessionId,
 
             /// URL to submit validation token to.
             ///
@@ -74,7 +74,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given session identifier.
-        pub fn new(sid: Box<SessionId>) -> Self {
+        pub fn new(sid: OwnedSessionId) -> Self {
             Self { sid, submit_url: None }
         }
     }
diff --git a/crates/ruma-client-api/src/account/request_password_change_token_via_msisdn.rs b/crates/ruma-client-api/src/account/request_password_change_token_via_msisdn.rs
index 35c94ff8..a1b465c2 100644
--- a/crates/ruma-client-api/src/account/request_password_change_token_via_msisdn.rs
+++ b/crates/ruma-client-api/src/account/request_password_change_token_via_msisdn.rs
@@ -6,7 +6,7 @@ pub mod v3 {
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3accountpasswordmsisdnrequesttoken
 
     use js_int::UInt;
-    use ruma_common::{api::ruma_api, ClientSecret, SessionId};
+    use ruma_common::{api::ruma_api, ClientSecret, OwnedSessionId};
 
     ruma_api! {
         metadata: {
@@ -40,7 +40,7 @@ pub mod v3 {
 
         response: {
             /// The session identifier given by the identity server.
-            pub sid: Box<SessionId>,
+            pub sid: OwnedSessionId,
 
             /// URL to submit validation token to.
             ///
@@ -74,7 +74,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given session identifier.
-        pub fn new(sid: Box<SessionId>) -> Self {
+        pub fn new(sid: OwnedSessionId) -> Self {
             Self { sid, submit_url: None }
         }
     }
diff --git a/crates/ruma-client-api/src/account/request_registration_token_via_email.rs b/crates/ruma-client-api/src/account/request_registration_token_via_email.rs
index 49dbcf11..13bc9927 100644
--- a/crates/ruma-client-api/src/account/request_registration_token_via_email.rs
+++ b/crates/ruma-client-api/src/account/request_registration_token_via_email.rs
@@ -6,7 +6,7 @@ pub mod v3 {
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3registeremailrequesttoken
 
     use js_int::UInt;
-    use ruma_common::{api::ruma_api, ClientSecret, SessionId};
+    use ruma_common::{api::ruma_api, ClientSecret, OwnedSessionId};
 
     use crate::account::{IdentityServerInfo, IncomingIdentityServerInfo};
 
@@ -45,7 +45,7 @@ pub mod v3 {
 
         response: {
             /// The session identifier given by the identity server.
-            pub sid: Box<SessionId>,
+            pub sid: OwnedSessionId,
 
             /// URL to submit validation token to.
             ///
@@ -74,7 +74,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given session identifier.
-        pub fn new(sid: Box<SessionId>) -> Self {
+        pub fn new(sid: OwnedSessionId) -> Self {
             Self { sid, submit_url: None }
         }
     }
diff --git a/crates/ruma-client-api/src/account/request_registration_token_via_msisdn.rs b/crates/ruma-client-api/src/account/request_registration_token_via_msisdn.rs
index 58506716..55b5bcf0 100644
--- a/crates/ruma-client-api/src/account/request_registration_token_via_msisdn.rs
+++ b/crates/ruma-client-api/src/account/request_registration_token_via_msisdn.rs
@@ -6,7 +6,7 @@ pub mod v3 {
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3registermsisdnrequesttoken
 
     use js_int::UInt;
-    use ruma_common::{api::ruma_api, ClientSecret, SessionId};
+    use ruma_common::{api::ruma_api, ClientSecret, OwnedSessionId};
 
     use crate::account::{IdentityServerInfo, IncomingIdentityServerInfo};
 
@@ -48,7 +48,7 @@ pub mod v3 {
 
         response: {
             /// The session identifier given by the identity server.
-            pub sid: Box<SessionId>,
+            pub sid: OwnedSessionId,
 
             /// URL to submit validation token to.
             ///
@@ -89,7 +89,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given session identifier.
-        pub fn new(sid: Box<SessionId>) -> Self {
+        pub fn new(sid: OwnedSessionId) -> Self {
             Self { sid, submit_url: None }
         }
     }
diff --git a/crates/ruma-client-api/src/account/whoami.rs b/crates/ruma-client-api/src/account/whoami.rs
index 4c7c2f0f..1adea7e0 100644
--- a/crates/ruma-client-api/src/account/whoami.rs
+++ b/crates/ruma-client-api/src/account/whoami.rs
@@ -5,7 +5,7 @@ pub mod v3 {
     //!
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#get_matrixclientv3accountwhoami
 
-    use ruma_common::{api::ruma_api, DeviceId, UserId};
+    use ruma_common::{api::ruma_api, OwnedDeviceId, OwnedUserId};
 
     ruma_api! {
         metadata: {
@@ -24,11 +24,11 @@ pub mod v3 {
 
         response: {
             /// The id of the user that owns the access token.
-            pub user_id: Box<UserId>,
+            pub user_id: OwnedUserId,
 
             /// The device ID associated with the access token, if any.
             #[serde(skip_serializing_if = "Option::is_none")]
-            pub device_id: Option<Box<DeviceId>>,
+            pub device_id: Option<OwnedDeviceId>,
 
             /// If `true`, the user is a guest user.
             #[serde(default, skip_serializing_if = "ruma_common::serde::is_default")]
@@ -47,7 +47,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given user ID.
-        pub fn new(user_id: Box<UserId>, is_guest: bool) -> Self {
+        pub fn new(user_id: OwnedUserId, is_guest: bool) -> Self {
             Self { user_id, device_id: None, is_guest }
         }
     }
diff --git a/crates/ruma-client-api/src/alias/get_alias.rs b/crates/ruma-client-api/src/alias/get_alias.rs
index eda7c47b..786a24ff 100644
--- a/crates/ruma-client-api/src/alias/get_alias.rs
+++ b/crates/ruma-client-api/src/alias/get_alias.rs
@@ -5,7 +5,7 @@ pub mod v3 {
     //!
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#get_matrixclientv3directoryroomroomalias
 
-    use ruma_common::{api::ruma_api, RoomAliasId, RoomId, ServerName};
+    use ruma_common::{api::ruma_api, OwnedRoomId, OwnedServerName, RoomAliasId};
 
     ruma_api! {
         metadata: {
@@ -27,10 +27,10 @@ pub mod v3 {
 
         response: {
             /// The room ID for this room alias.
-            pub room_id: Box<RoomId>,
+            pub room_id: OwnedRoomId,
 
             /// A list of servers that are aware of this room ID.
-            pub servers: Vec<Box<ServerName>>,
+            pub servers: Vec<OwnedServerName>,
         }
 
         error: crate::Error
@@ -45,7 +45,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given room id and servers
-        pub fn new(room_id: Box<RoomId>, servers: Vec<Box<ServerName>>) -> Self {
+        pub fn new(room_id: OwnedRoomId, servers: Vec<OwnedServerName>) -> Self {
             Self { room_id, servers }
         }
     }
diff --git a/crates/ruma-client-api/src/backup.rs b/crates/ruma-client-api/src/backup.rs
index ed1c2f63..edc30460 100644
--- a/crates/ruma-client-api/src/backup.rs
+++ b/crates/ruma-client-api/src/backup.rs
@@ -20,7 +20,7 @@ use std::collections::BTreeMap;
 use js_int::UInt;
 use ruma_common::{
     serde::{Base64, Raw},
-    DeviceKeyId, UserId,
+    OwnedDeviceKeyId, OwnedUserId,
 };
 use serde::{Deserialize, Serialize};
 
@@ -51,7 +51,7 @@ pub enum BackupAlgorithm {
         public_key: Base64,
 
         /// Signatures of the auth_data as Signed JSON.
-        signatures: BTreeMap<Box<UserId>, BTreeMap<Box<DeviceKeyId>, String>>,
+        signatures: BTreeMap<OwnedUserId, BTreeMap<OwnedDeviceKeyId, String>>,
     },
 }
 
diff --git a/crates/ruma-client-api/src/backup/add_backup_keys.rs b/crates/ruma-client-api/src/backup/add_backup_keys.rs
index 0776f67b..8859f5b5 100644
--- a/crates/ruma-client-api/src/backup/add_backup_keys.rs
+++ b/crates/ruma-client-api/src/backup/add_backup_keys.rs
@@ -8,7 +8,7 @@ pub mod v3 {
     use std::collections::BTreeMap;
 
     use js_int::UInt;
-    use ruma_common::{api::ruma_api, RoomId};
+    use ruma_common::{api::ruma_api, OwnedRoomId};
 
     use crate::backup::RoomKeyBackup;
 
@@ -32,7 +32,7 @@ pub mod v3 {
             pub version: &'a str,
 
             /// A map of room IDs to session IDs to key data to store.
-            pub rooms: BTreeMap<Box<RoomId>, RoomKeyBackup>,
+            pub rooms: BTreeMap<OwnedRoomId, RoomKeyBackup>,
         }
 
         response: {
@@ -51,7 +51,7 @@ pub mod v3 {
 
     impl<'a> Request<'a> {
         /// Creates a new `Request` with the given version and room key backups.
-        pub fn new(version: &'a str, rooms: BTreeMap<Box<RoomId>, RoomKeyBackup>) -> Self {
+        pub fn new(version: &'a str, rooms: BTreeMap<OwnedRoomId, RoomKeyBackup>) -> Self {
             Self { version, rooms }
         }
     }
diff --git a/crates/ruma-client-api/src/backup/get_backup_keys.rs b/crates/ruma-client-api/src/backup/get_backup_keys.rs
index b08d99cc..a607c6fa 100644
--- a/crates/ruma-client-api/src/backup/get_backup_keys.rs
+++ b/crates/ruma-client-api/src/backup/get_backup_keys.rs
@@ -9,7 +9,7 @@ pub mod v3 {
 
     use std::collections::BTreeMap;
 
-    use ruma_common::{api::ruma_api, RoomId};
+    use ruma_common::{api::ruma_api, OwnedRoomId};
 
     use crate::backup::RoomKeyBackup;
 
@@ -34,7 +34,7 @@ pub mod v3 {
 
         response: {
             /// A map from room IDs to session IDs to key data.
-            pub rooms: BTreeMap<Box<RoomId>, RoomKeyBackup>,
+            pub rooms: BTreeMap<OwnedRoomId, RoomKeyBackup>,
         }
 
         error: crate::Error
@@ -49,7 +49,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given room key backups.
-        pub fn new(rooms: BTreeMap<Box<RoomId>, RoomKeyBackup>) -> Self {
+        pub fn new(rooms: BTreeMap<OwnedRoomId, RoomKeyBackup>) -> Self {
             Self { rooms }
         }
     }
diff --git a/crates/ruma-client-api/src/device.rs b/crates/ruma-client-api/src/device.rs
index 8ae251ca..387991cc 100644
--- a/crates/ruma-client-api/src/device.rs
+++ b/crates/ruma-client-api/src/device.rs
@@ -1,6 +1,6 @@
 //! Endpoints for managing devices.
 
-use ruma_common::{DeviceId, MilliSecondsSinceUnixEpoch};
+use ruma_common::{MilliSecondsSinceUnixEpoch, OwnedDeviceId};
 use serde::{Deserialize, Serialize};
 
 pub mod delete_device;
@@ -14,7 +14,7 @@ pub mod update_device;
 #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
 pub struct Device {
     /// Device ID
-    pub device_id: Box<DeviceId>,
+    pub device_id: OwnedDeviceId,
 
     /// Public display name of the device.
     pub display_name: Option<String>,
@@ -29,7 +29,7 @@ pub struct Device {
 
 impl Device {
     /// Creates a new `Device` with the given device ID.
-    pub fn new(device_id: Box<DeviceId>) -> Self {
+    pub fn new(device_id: OwnedDeviceId) -> Self {
         Self { device_id, display_name: None, last_seen_ip: None, last_seen_ts: None }
     }
 }
diff --git a/crates/ruma-client-api/src/device/delete_devices.rs b/crates/ruma-client-api/src/device/delete_devices.rs
index 2f120937..1b5ba652 100644
--- a/crates/ruma-client-api/src/device/delete_devices.rs
+++ b/crates/ruma-client-api/src/device/delete_devices.rs
@@ -5,7 +5,7 @@ pub mod v3 {
     //!
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3delete_devices
 
-    use ruma_common::{api::ruma_api, DeviceId};
+    use ruma_common::{api::ruma_api, OwnedDeviceId};
 
     use crate::uiaa::{AuthData, IncomingAuthData, UiaaResponse};
 
@@ -23,7 +23,7 @@ pub mod v3 {
 
         request: {
             /// List of devices to delete.
-            pub devices: &'a [Box<DeviceId>],
+            pub devices: &'a [OwnedDeviceId],
 
             /// Additional authentication information for the user-interactive authentication API.
             #[serde(skip_serializing_if = "Option::is_none")]
@@ -38,7 +38,7 @@ pub mod v3 {
 
     impl<'a> Request<'a> {
         /// Creates a new `Request` with the given device list.
-        pub fn new(devices: &'a [Box<DeviceId>]) -> Self {
+        pub fn new(devices: &'a [OwnedDeviceId]) -> Self {
             Self { devices, auth: None }
         }
     }
diff --git a/crates/ruma-client-api/src/filter.rs b/crates/ruma-client-api/src/filter.rs
index 0eefcbfe..ecce7847 100644
--- a/crates/ruma-client-api/src/filter.rs
+++ b/crates/ruma-client-api/src/filter.rs
@@ -9,7 +9,7 @@ mod url;
 use js_int::UInt;
 use ruma_common::{
     serde::{Incoming, StringEnum},
-    OwnedRoomId, RoomId, UserId,
+    OwnedRoomId, OwnedUserId,
 };
 use serde::Serialize;
 
@@ -116,13 +116,13 @@ pub struct RoomEventFilter<'a> {
     /// If this list is absent then no senders are excluded. A matching sender will be excluded
     /// even if it is listed in the 'senders' filter.
     #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
-    pub not_senders: &'a [Box<UserId>],
+    pub not_senders: &'a [OwnedUserId],
 
     /// A list of senders IDs to include.
     ///
     /// If this list is absent then all senders are included.
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub senders: Option<&'a [Box<UserId>]>,
+    pub senders: Option<&'a [OwnedUserId]>,
 
     /// A list of event types to include.
     ///
@@ -169,7 +169,7 @@ pub struct RoomEventFilter<'a> {
         default,
         skip_serializing_if = "<[_]>::is_empty"
     )]
-    pub related_by_senders: &'a [Box<UserId>],
+    pub related_by_senders: &'a [OwnedUserId],
 }
 
 impl<'a> RoomEventFilter<'a> {
@@ -260,14 +260,14 @@ pub struct RoomFilter<'a> {
     /// it is listed in the 'rooms' filter. This filter is applied before the filters in
     /// `ephemeral`, `state`, `timeline` or `account_data`.
     #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
-    pub not_rooms: &'a [Box<RoomId>],
+    pub not_rooms: &'a [OwnedRoomId],
 
     /// A list of room IDs to include.
     ///
     /// If this list is absent then all rooms are included. This filter is applied before the
     /// filters in `ephemeral`, `state`, `timeline` or `account_data`.
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub rooms: Option<&'a [Box<RoomId>]>,
+    pub rooms: Option<&'a [OwnedRoomId]>,
 }
 
 impl<'a> RoomFilter<'a> {
@@ -329,7 +329,7 @@ pub struct Filter<'a> {
     ///
     /// If this list is absent then all senders are included.
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub senders: Option<&'a [Box<UserId>]>,
+    pub senders: Option<&'a [OwnedUserId]>,
 
     /// A list of event types to include.
     ///
@@ -343,7 +343,7 @@ pub struct Filter<'a> {
     /// If this list is absent then no senders are excluded. A matching sender will be excluded
     /// even if it is listed in the 'senders' filter.
     #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
-    pub not_senders: &'a [Box<UserId>],
+    pub not_senders: &'a [OwnedUserId],
 }
 
 impl<'a> Filter<'a> {
diff --git a/crates/ruma-client-api/src/keys/claim_keys.rs b/crates/ruma-client-api/src/keys/claim_keys.rs
index d00467a4..baf642b5 100644
--- a/crates/ruma-client-api/src/keys/claim_keys.rs
+++ b/crates/ruma-client-api/src/keys/claim_keys.rs
@@ -8,8 +8,8 @@ pub mod v3 {
     use std::{collections::BTreeMap, time::Duration};
 
     use ruma_common::{
-        api::ruma_api, encryption::OneTimeKey, serde::Raw, DeviceId, DeviceKeyAlgorithm,
-        DeviceKeyId, UserId,
+        api::ruma_api, encryption::OneTimeKey, serde::Raw, DeviceKeyAlgorithm, OwnedDeviceId,
+        OwnedDeviceKeyId, OwnedUserId,
     };
     use serde_json::Value as JsonValue;
 
@@ -36,7 +36,7 @@ pub mod v3 {
             pub timeout: Option<Duration>,
 
             /// The keys to be claimed.
-            pub one_time_keys: BTreeMap<Box<UserId>, BTreeMap<Box<DeviceId>, DeviceKeyAlgorithm>>,
+            pub one_time_keys: BTreeMap<OwnedUserId, BTreeMap<OwnedDeviceId, DeviceKeyAlgorithm>>,
         }
 
         response: {
@@ -45,7 +45,7 @@ pub mod v3 {
             pub failures: BTreeMap<String, JsonValue>,
 
             /// One-time keys for the queried devices.
-            pub one_time_keys: BTreeMap<Box<UserId>, OneTimeKeys>,
+            pub one_time_keys: BTreeMap<OwnedUserId, OneTimeKeys>,
         }
 
         error: crate::Error
@@ -54,7 +54,7 @@ pub mod v3 {
     impl Request {
         /// Creates a new `Request` with the given key claims and the recommended 10 second timeout.
         pub fn new(
-            one_time_keys: BTreeMap<Box<UserId>, BTreeMap<Box<DeviceId>, DeviceKeyAlgorithm>>,
+            one_time_keys: BTreeMap<OwnedUserId, BTreeMap<OwnedDeviceId, DeviceKeyAlgorithm>>,
         ) -> Self {
             Self { timeout: Some(Duration::from_secs(10)), one_time_keys }
         }
@@ -62,11 +62,11 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given keys and no failures.
-        pub fn new(one_time_keys: BTreeMap<Box<UserId>, OneTimeKeys>) -> Self {
+        pub fn new(one_time_keys: BTreeMap<OwnedUserId, OneTimeKeys>) -> Self {
             Self { failures: BTreeMap::new(), one_time_keys }
         }
     }
 
     /// The one-time keys for a given device.
-    pub type OneTimeKeys = BTreeMap<Box<DeviceId>, BTreeMap<Box<DeviceKeyId>, Raw<OneTimeKey>>>;
+    pub type OneTimeKeys = BTreeMap<OwnedDeviceId, BTreeMap<OwnedDeviceKeyId, Raw<OneTimeKey>>>;
 }
diff --git a/crates/ruma-client-api/src/keys/get_key_changes.rs b/crates/ruma-client-api/src/keys/get_key_changes.rs
index 9c3aea7f..d5607dba 100644
--- a/crates/ruma-client-api/src/keys/get_key_changes.rs
+++ b/crates/ruma-client-api/src/keys/get_key_changes.rs
@@ -5,7 +5,7 @@ pub mod v3 {
     //!
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#get_matrixclientv3keyschanges
 
-    use ruma_common::{api::ruma_api, UserId};
+    use ruma_common::{api::ruma_api, OwnedUserId};
 
     ruma_api! {
         metadata: {
@@ -36,11 +36,11 @@ pub mod v3 {
 
         response: {
             /// The Matrix User IDs of all users who updated their device identity keys.
-            pub changed: Vec<Box<UserId>>,
+            pub changed: Vec<OwnedUserId>,
 
             /// The Matrix User IDs of all users who may have left all the end-to-end
             /// encrypted rooms they previously shared with the user.
-            pub left: Vec<Box<UserId>>,
+            pub left: Vec<OwnedUserId>,
         }
 
         error: crate::Error
@@ -55,7 +55,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given changed and left user ID lists.
-        pub fn new(changed: Vec<Box<UserId>>, left: Vec<Box<UserId>>) -> Self {
+        pub fn new(changed: Vec<OwnedUserId>, left: Vec<OwnedUserId>) -> Self {
             Self { changed, left }
         }
     }
diff --git a/crates/ruma-client-api/src/keys/get_keys.rs b/crates/ruma-client-api/src/keys/get_keys.rs
index 9eab924f..0e299489 100644
--- a/crates/ruma-client-api/src/keys/get_keys.rs
+++ b/crates/ruma-client-api/src/keys/get_keys.rs
@@ -11,7 +11,7 @@ pub mod v3 {
         api::ruma_api,
         encryption::{CrossSigningKey, DeviceKeys},
         serde::Raw,
-        DeviceId, UserId,
+        OwnedDeviceId, OwnedUserId,
     };
     use serde_json::Value as JsonValue;
 
@@ -42,7 +42,7 @@ pub mod v3 {
             /// The keys to be downloaded.
             ///
             /// An empty list indicates all devices for the corresponding user.
-            pub device_keys: BTreeMap<Box<UserId>, Vec<Box<DeviceId>>>,
+            pub device_keys: BTreeMap<OwnedUserId, Vec<OwnedDeviceId>>,
 
             /// If the client is fetching keys as a result of a device update received in a sync
             /// request, this should be the 'since' token of that sync request, or any later sync token.
@@ -63,19 +63,19 @@ pub mod v3 {
 
             /// Information on the queried devices.
             #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-            pub device_keys: BTreeMap<Box<UserId>, BTreeMap<Box<DeviceId>, Raw<DeviceKeys>>>,
+            pub device_keys: BTreeMap<OwnedUserId, BTreeMap<OwnedDeviceId, Raw<DeviceKeys>>>,
 
             /// Information on the master cross-signing keys of the queried users.
             #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-            pub master_keys: BTreeMap<Box<UserId>, Raw<CrossSigningKey>>,
+            pub master_keys: BTreeMap<OwnedUserId, Raw<CrossSigningKey>>,
 
             /// Information on the self-signing keys of the queried users.
             #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-            pub self_signing_keys: BTreeMap<Box<UserId>, Raw<CrossSigningKey>>,
+            pub self_signing_keys: BTreeMap<OwnedUserId, Raw<CrossSigningKey>>,
 
             /// Information on the user-signing keys of the queried users.
             #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-            pub user_signing_keys: BTreeMap<Box<UserId>, Raw<CrossSigningKey>>,
+            pub user_signing_keys: BTreeMap<OwnedUserId, Raw<CrossSigningKey>>,
         }
 
         error: crate::Error
diff --git a/crates/ruma-client-api/src/keys/upload_keys.rs b/crates/ruma-client-api/src/keys/upload_keys.rs
index a50c4ec8..a66907cf 100644
--- a/crates/ruma-client-api/src/keys/upload_keys.rs
+++ b/crates/ruma-client-api/src/keys/upload_keys.rs
@@ -12,7 +12,7 @@ pub mod v3 {
         api::ruma_api,
         encryption::{DeviceKeys, OneTimeKey},
         serde::Raw,
-        DeviceKeyAlgorithm, DeviceKeyId,
+        DeviceKeyAlgorithm, OwnedDeviceKeyId,
     };
 
     ruma_api! {
@@ -37,11 +37,11 @@ pub mod v3 {
 
             /// One-time public keys for "pre-key" messages.
             #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-            pub one_time_keys: BTreeMap<Box<DeviceKeyId>, Raw<OneTimeKey>>,
+            pub one_time_keys: BTreeMap<OwnedDeviceKeyId, Raw<OneTimeKey>>,
 
             /// Fallback public keys for "pre-key" messages.
             #[serde(default, skip_serializing_if = "BTreeMap::is_empty", rename = "org.matrix.msc2732.fallback_keys")]
-            pub fallback_keys: BTreeMap<Box<DeviceKeyId>, Raw<OneTimeKey>>,
+            pub fallback_keys: BTreeMap<OwnedDeviceKeyId, Raw<OneTimeKey>>,
         }
 
         response: {
diff --git a/crates/ruma-client-api/src/keys/upload_signatures.rs b/crates/ruma-client-api/src/keys/upload_signatures.rs
index b0354ca5..a3417945 100644
--- a/crates/ruma-client-api/src/keys/upload_signatures.rs
+++ b/crates/ruma-client-api/src/keys/upload_signatures.rs
@@ -11,7 +11,7 @@ pub mod v3 {
         api::ruma_api,
         encryption::{CrossSigningKey, DeviceKeys},
         serde::{Raw, StringEnum},
-        DeviceId, UserId,
+        OwnedDeviceId, OwnedUserId,
     };
     use serde::{Deserialize, Serialize};
     use serde_json::value::RawValue as RawJsonValue;
@@ -35,13 +35,13 @@ pub mod v3 {
         request: {
             /// Signed keys.
             #[ruma_api(body)]
-            pub signed_keys: BTreeMap<Box<UserId>, SignedKeys>,
+            pub signed_keys: BTreeMap<OwnedUserId, SignedKeys>,
         }
 
         #[derive(Default)]
         response: {
             /// Signature processing failures.
-            pub failures: BTreeMap<Box<UserId>, BTreeMap<String, Failure>>,
+            pub failures: BTreeMap<OwnedUserId, BTreeMap<String, Failure>>,
         }
 
         error: crate::Error
@@ -49,7 +49,7 @@ pub mod v3 {
 
     impl Request {
         /// Creates a new `Request` with the given signed keys.
-        pub fn new(signed_keys: BTreeMap<Box<UserId>, SignedKeys>) -> Self {
+        pub fn new(signed_keys: BTreeMap<OwnedUserId, SignedKeys>) -> Self {
             Self { signed_keys }
         }
     }
@@ -73,8 +73,8 @@ pub mod v3 {
         }
 
         /// Add the given device keys.
-        pub fn add_device_keys(&mut self, device_id: Box<DeviceId>, device_keys: Raw<DeviceKeys>) {
-            self.0.insert(device_id.into(), device_keys.into_json());
+        pub fn add_device_keys(&mut self, device_id: OwnedDeviceId, device_keys: Raw<DeviceKeys>) {
+            self.0.insert(device_id.as_str().into(), device_keys.into_json());
         }
 
         /// Add the given cross signing keys.
diff --git a/crates/ruma-client-api/src/knock/knock_room.rs b/crates/ruma-client-api/src/knock/knock_room.rs
index 610044bf..b596113b 100644
--- a/crates/ruma-client-api/src/knock/knock_room.rs
+++ b/crates/ruma-client-api/src/knock/knock_room.rs
@@ -5,7 +5,7 @@ pub mod v3 {
     //!
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3knockroomidoralias
 
-    use ruma_common::{api::ruma_api, RoomId, RoomOrAliasId, ServerName};
+    use ruma_common::{api::ruma_api, OwnedRoomId, OwnedServerName, RoomOrAliasId};
 
     ruma_api! {
         metadata: {
@@ -33,12 +33,12 @@ pub mod v3 {
             /// One of the servers must be participating in the room.
             #[ruma_api(query)]
             #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
-            pub server_name: &'a [Box<ServerName>],
+            pub server_name: &'a [OwnedServerName],
         }
 
         response: {
             /// The room that the user knocked on.
-            pub room_id: Box<RoomId>,
+            pub room_id: OwnedRoomId,
         }
     }
 
@@ -51,7 +51,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given room ID.
-        pub fn new(room_id: Box<RoomId>) -> Self {
+        pub fn new(room_id: OwnedRoomId) -> Self {
             Self { room_id }
         }
     }
diff --git a/crates/ruma-client-api/src/membership.rs b/crates/ruma-client-api/src/membership.rs
index e0fa2065..9e079394 100644
--- a/crates/ruma-client-api/src/membership.rs
+++ b/crates/ruma-client-api/src/membership.rs
@@ -14,7 +14,9 @@ pub mod unban_user;
 
 use std::collections::BTreeMap;
 
-use ruma_common::{serde::Incoming, thirdparty::Medium, ServerName, ServerSigningKeyId, UserId};
+use ruma_common::{
+    serde::Incoming, thirdparty::Medium, OwnedServerName, ServerSigningKeyId, UserId,
+};
 use serde::Serialize;
 
 /// A signature of an `m.third_party_invite` token to prove that this user owns a third party
@@ -32,7 +34,7 @@ pub struct ThirdPartySigned<'a> {
     pub token: &'a str,
 
     /// A signatures object containing a signature of the entire signed object.
-    pub signatures: BTreeMap<Box<ServerName>, BTreeMap<Box<ServerSigningKeyId>, String>>,
+    pub signatures: BTreeMap<OwnedServerName, BTreeMap<Box<ServerSigningKeyId>, String>>,
 }
 
 impl<'a> ThirdPartySigned<'a> {
@@ -42,7 +44,7 @@ impl<'a> ThirdPartySigned<'a> {
         sender: &'a UserId,
         mxid: &'a UserId,
         token: &'a str,
-        signatures: BTreeMap<Box<ServerName>, BTreeMap<Box<ServerSigningKeyId>, String>>,
+        signatures: BTreeMap<OwnedServerName, BTreeMap<Box<ServerSigningKeyId>, String>>,
     ) -> Self {
         Self { sender, mxid, token, signatures }
     }
diff --git a/crates/ruma-client-api/src/membership/join_room_by_id.rs b/crates/ruma-client-api/src/membership/join_room_by_id.rs
index 52d0c49e..b815597d 100644
--- a/crates/ruma-client-api/src/membership/join_room_by_id.rs
+++ b/crates/ruma-client-api/src/membership/join_room_by_id.rs
@@ -5,7 +5,7 @@ pub mod v3 {
     //!
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3roomsroomidjoin
 
-    use ruma_common::{api::ruma_api, RoomId};
+    use ruma_common::{api::ruma_api, OwnedRoomId, RoomId};
 
     use crate::membership::{IncomingThirdPartySigned, ThirdPartySigned};
 
@@ -38,7 +38,7 @@ pub mod v3 {
 
         response: {
             /// The room that the user joined.
-            pub room_id: Box<RoomId>,
+            pub room_id: OwnedRoomId,
         }
 
         error: crate::Error
@@ -53,7 +53,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given room id.
-        pub fn new(room_id: Box<RoomId>) -> Self {
+        pub fn new(room_id: OwnedRoomId) -> Self {
             Self { room_id }
         }
     }
diff --git a/crates/ruma-client-api/src/membership/join_room_by_id_or_alias.rs b/crates/ruma-client-api/src/membership/join_room_by_id_or_alias.rs
index cfa28463..8e770e69 100644
--- a/crates/ruma-client-api/src/membership/join_room_by_id_or_alias.rs
+++ b/crates/ruma-client-api/src/membership/join_room_by_id_or_alias.rs
@@ -5,7 +5,7 @@ pub mod v3 {
     //!
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3joinroomidoralias
 
-    use ruma_common::{api::ruma_api, RoomId, RoomOrAliasId, ServerName};
+    use ruma_common::{api::ruma_api, OwnedRoomId, OwnedServerName, RoomOrAliasId};
 
     use crate::membership::{IncomingThirdPartySigned, ThirdPartySigned};
 
@@ -31,7 +31,7 @@ pub mod v3 {
             /// One of the servers  must be participating in the room.
             #[ruma_api(query)]
             #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
-            pub server_name: &'a [Box<ServerName>],
+            pub server_name: &'a [OwnedServerName],
 
             /// The signature of a `m.third_party_invite` token to prove that this user owns a third
             /// party identity which has been invited to the room.
@@ -45,7 +45,7 @@ pub mod v3 {
 
         response: {
             /// The room that the user joined.
-            pub room_id: Box<RoomId>,
+            pub room_id: OwnedRoomId,
         }
 
         error: crate::Error
@@ -60,7 +60,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given room ID.
-        pub fn new(room_id: Box<RoomId>) -> Self {
+        pub fn new(room_id: OwnedRoomId) -> Self {
             Self { room_id }
         }
     }
diff --git a/crates/ruma-client-api/src/membership/joined_members.rs b/crates/ruma-client-api/src/membership/joined_members.rs
index 3e6c3f12..760ee62c 100644
--- a/crates/ruma-client-api/src/membership/joined_members.rs
+++ b/crates/ruma-client-api/src/membership/joined_members.rs
@@ -7,7 +7,7 @@ pub mod v3 {
 
     use std::collections::BTreeMap;
 
-    use ruma_common::{api::ruma_api, MxcUri, RoomId, UserId};
+    use ruma_common::{api::ruma_api, MxcUri, OwnedUserId, RoomId};
     use serde::{Deserialize, Serialize};
 
     ruma_api! {
@@ -31,7 +31,7 @@ pub mod v3 {
         response: {
             /// A list of the rooms the user is in, i.e.
             /// the ID of each room in which the user has joined membership.
-            pub joined: BTreeMap<Box<UserId>, RoomMember>,
+            pub joined: BTreeMap<OwnedUserId, RoomMember>,
         }
 
         error: crate::Error
@@ -46,7 +46,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given joined rooms.
-        pub fn new(joined: BTreeMap<Box<UserId>, RoomMember>) -> Self {
+        pub fn new(joined: BTreeMap<OwnedUserId, RoomMember>) -> Self {
             Self { joined }
         }
     }
diff --git a/crates/ruma-client-api/src/membership/joined_rooms.rs b/crates/ruma-client-api/src/membership/joined_rooms.rs
index ce3082d7..490f4fdf 100644
--- a/crates/ruma-client-api/src/membership/joined_rooms.rs
+++ b/crates/ruma-client-api/src/membership/joined_rooms.rs
@@ -5,7 +5,7 @@ pub mod v3 {
     //!
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#get_matrixclientv3joined_rooms
 
-    use ruma_common::{api::ruma_api, RoomId};
+    use ruma_common::{api::ruma_api, OwnedRoomId};
 
     ruma_api! {
         metadata: {
@@ -25,7 +25,7 @@ pub mod v3 {
         response: {
             /// A list of the rooms the user is in, i.e. the ID of each room in
             /// which the user has joined membership.
-            pub joined_rooms: Vec<Box<RoomId>>,
+            pub joined_rooms: Vec<OwnedRoomId>,
         }
 
         error: crate::Error
@@ -40,7 +40,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given joined rooms.
-        pub fn new(joined_rooms: Vec<Box<RoomId>>) -> Self {
+        pub fn new(joined_rooms: Vec<OwnedRoomId>) -> Self {
             Self { joined_rooms }
         }
     }
diff --git a/crates/ruma-client-api/src/message/send_message_event.rs b/crates/ruma-client-api/src/message/send_message_event.rs
index 8ff5b9c3..714aa34e 100644
--- a/crates/ruma-client-api/src/message/send_message_event.rs
+++ b/crates/ruma-client-api/src/message/send_message_event.rs
@@ -9,7 +9,7 @@ pub mod v3 {
         api::ruma_api,
         events::{AnyMessageLikeEventContent, MessageLikeEventContent, MessageLikeEventType},
         serde::Raw,
-        EventId, RoomId, TransactionId,
+        OwnedEventId, RoomId, TransactionId,
     };
     use serde_json::value::to_raw_value as to_raw_json_value;
 
@@ -49,7 +49,7 @@ pub mod v3 {
 
         response: {
             /// A unique identifier for the event.
-            pub event_id: Box<EventId>,
+            pub event_id: OwnedEventId,
         }
 
         error: crate::Error
@@ -92,7 +92,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given event id.
-        pub fn new(event_id: Box<EventId>) -> Self {
+        pub fn new(event_id: OwnedEventId) -> Self {
             Self { event_id }
         }
     }
diff --git a/crates/ruma-client-api/src/push/get_notifications.rs b/crates/ruma-client-api/src/push/get_notifications.rs
index b4584540..14e9a2f4 100644
--- a/crates/ruma-client-api/src/push/get_notifications.rs
+++ b/crates/ruma-client-api/src/push/get_notifications.rs
@@ -8,7 +8,7 @@ pub mod v3 {
     use js_int::UInt;
     use ruma_common::{
         api::ruma_api, events::AnySyncRoomEvent, push::Action, serde::Raw,
-        MilliSecondsSinceUnixEpoch, RoomId,
+        MilliSecondsSinceUnixEpoch, OwnedRoomId,
     };
     use serde::{Deserialize, Serialize};
 
@@ -94,7 +94,7 @@ pub mod v3 {
         pub read: bool,
 
         /// The ID of the room in which the event was posted.
-        pub room_id: Box<RoomId>,
+        pub room_id: OwnedRoomId,
 
         /// The time at which the event notification was sent.
         pub ts: MilliSecondsSinceUnixEpoch,
@@ -107,7 +107,7 @@ pub mod v3 {
             actions: Vec<Action>,
             event: Raw<AnySyncRoomEvent>,
             read: bool,
-            room_id: Box<RoomId>,
+            room_id: OwnedRoomId,
             ts: MilliSecondsSinceUnixEpoch,
         ) -> Self {
             Self { actions, event, profile_tag: None, read, room_id, ts }
diff --git a/crates/ruma-client-api/src/redact/redact_event.rs b/crates/ruma-client-api/src/redact/redact_event.rs
index 47b2f59d..60e7ef2e 100644
--- a/crates/ruma-client-api/src/redact/redact_event.rs
+++ b/crates/ruma-client-api/src/redact/redact_event.rs
@@ -5,7 +5,7 @@ pub mod v3 {
     //!
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#put_matrixclientv3roomsroomidredacteventidtxnid
 
-    use ruma_common::{api::ruma_api, EventId, RoomId, TransactionId};
+    use ruma_common::{api::ruma_api, EventId, OwnedEventId, RoomId, TransactionId};
 
     ruma_api! {
         metadata: {
@@ -42,7 +42,7 @@ pub mod v3 {
 
         response: {
             /// The ID of the redacted event.
-            pub event_id: Box<EventId>,
+            pub event_id: OwnedEventId,
         }
 
         error: crate::Error
@@ -57,7 +57,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given event ID.
-        pub fn new(event_id: Box<EventId>) -> Self {
+        pub fn new(event_id: OwnedEventId) -> Self {
             Self { event_id }
         }
     }
diff --git a/crates/ruma-client-api/src/room/aliases.rs b/crates/ruma-client-api/src/room/aliases.rs
index 971e3209..cf0a72f7 100644
--- a/crates/ruma-client-api/src/room/aliases.rs
+++ b/crates/ruma-client-api/src/room/aliases.rs
@@ -5,7 +5,7 @@ pub mod v3 {
     //!
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#get_matrixclientv3roomsroomidaliases
 
-    use ruma_common::{api::ruma_api, RoomAliasId, RoomId};
+    use ruma_common::{api::ruma_api, OwnedRoomAliasId, RoomId};
 
     ruma_api! {
         metadata: {
@@ -28,7 +28,7 @@ pub mod v3 {
 
         response: {
             /// The server's local aliases on the room.
-            pub aliases: Vec<Box<RoomAliasId>>,
+            pub aliases: Vec<OwnedRoomAliasId>,
         }
 
         error: crate::Error
@@ -43,7 +43,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given aliases.
-        pub fn new(aliases: Vec<Box<RoomAliasId>>) -> Self {
+        pub fn new(aliases: Vec<OwnedRoomAliasId>) -> Self {
             Self { aliases }
         }
     }
diff --git a/crates/ruma-client-api/src/room/create_room.rs b/crates/ruma-client-api/src/room/create_room.rs
index f87d0ded..1e91af34 100644
--- a/crates/ruma-client-api/src/room/create_room.rs
+++ b/crates/ruma-client-api/src/room/create_room.rs
@@ -17,7 +17,7 @@ pub mod v3 {
         },
         room::RoomType,
         serde::{Raw, StringEnum},
-        OwnedUserId, RoomId, RoomName, RoomVersionId, UserId,
+        OwnedRoomId, OwnedUserId, RoomName, RoomVersionId,
     };
     use serde::{Deserialize, Serialize};
 
@@ -55,7 +55,7 @@ pub mod v3 {
             ///
             /// This will tell the server to invite everyone in the list to the newly created room.
             #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
-            pub invite: &'a [Box<UserId>],
+            pub invite: &'a [OwnedUserId],
 
             /// List of third party IDs of users to invite.
             #[serde(default, skip_serializing_if = "<[_]>::is_empty")]
@@ -103,7 +103,7 @@ pub mod v3 {
 
         response: {
             /// The created room's ID.
-            pub room_id: Box<RoomId>,
+            pub room_id: OwnedRoomId,
         }
 
         error: crate::Error
@@ -118,7 +118,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given room id.
-        pub fn new(room_id: Box<RoomId>) -> Self {
+        pub fn new(room_id: OwnedRoomId) -> Self {
             Self { room_id }
         }
     }
diff --git a/crates/ruma-client-api/src/room/upgrade_room.rs b/crates/ruma-client-api/src/room/upgrade_room.rs
index 554675ac..9660f22e 100644
--- a/crates/ruma-client-api/src/room/upgrade_room.rs
+++ b/crates/ruma-client-api/src/room/upgrade_room.rs
@@ -5,7 +5,7 @@ pub mod v3 {
     //!
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3roomsroomidupgrade
 
-    use ruma_common::{api::ruma_api, RoomId, RoomVersionId};
+    use ruma_common::{api::ruma_api, OwnedRoomId, RoomId, RoomVersionId};
 
     ruma_api! {
         metadata: {
@@ -30,7 +30,7 @@ pub mod v3 {
 
         response: {
             /// ID of the new room.
-            pub replacement_room: Box<RoomId>,
+            pub replacement_room: OwnedRoomId,
         }
 
         error: crate::Error
@@ -45,7 +45,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given room ID.
-        pub fn new(replacement_room: Box<RoomId>) -> Self {
+        pub fn new(replacement_room: OwnedRoomId) -> Self {
             Self { replacement_room }
         }
     }
diff --git a/crates/ruma-client-api/src/search/search_events.rs b/crates/ruma-client-api/src/search/search_events.rs
index c9f14755..ccb231b6 100644
--- a/crates/ruma-client-api/src/search/search_events.rs
+++ b/crates/ruma-client-api/src/search/search_events.rs
@@ -12,7 +12,7 @@ pub mod v3 {
         api::ruma_api,
         events::{AnyRoomEvent, AnyStateEvent},
         serde::{Incoming, Raw, StringEnum},
-        EventId, MxcUri, RoomId, UserId,
+        MxcUri, OwnedEventId, OwnedRoomId, OwnedUserId,
     };
     use serde::{Deserialize, Serialize};
 
@@ -206,7 +206,7 @@ pub mod v3 {
 
         /// The historic profile information of the users that sent the events returned.
         #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-        pub profile_info: BTreeMap<Box<UserId>, UserProfile>,
+        pub profile_info: BTreeMap<OwnedUserId, UserProfile>,
 
         /// Pagination token for the start of the chunk.
         #[serde(skip_serializing_if = "Option::is_none")]
@@ -371,7 +371,7 @@ pub mod v3 {
 
         /// Any groups that were requested.
         #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-        pub groups: BTreeMap<GroupingKey, BTreeMap<Box<RoomIdOrUserId>, ResultGroup>>,
+        pub groups: BTreeMap<GroupingKey, BTreeMap<OwnedRoomIdOrUserId, ResultGroup>>,
 
         /// Token that can be used to get the next batch of results, by passing as the `next_batch`
         /// parameter to the next call.
@@ -388,7 +388,7 @@ pub mod v3 {
         ///
         /// This is included if the request had the `include_state` key set with a value of `true`.
         #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-        pub state: BTreeMap<Box<RoomId>, Vec<Raw<AnyStateEvent>>>,
+        pub state: BTreeMap<OwnedRoomId, Vec<Raw<AnyStateEvent>>>,
 
         /// List of words which should be highlighted, useful for stemming which may
         /// change the query terms.
@@ -430,7 +430,7 @@ pub mod v3 {
 
         /// Which results are in this group.
         #[serde(default, skip_serializing_if = "Vec::is_empty")]
-        pub results: Vec<Box<EventId>>,
+        pub results: Vec<OwnedEventId>,
     }
 
     impl ResultGroup {
@@ -511,11 +511,11 @@ pub mod v3 {
     /// Represents either a room or user ID for returning grouped search results.
     #[derive(Clone, Debug, Deserialize, Eq, Ord, PartialEq, PartialOrd, Serialize)]
     #[allow(clippy::exhaustive_enums)]
-    pub enum RoomIdOrUserId {
+    pub enum OwnedRoomIdOrUserId {
         /// Represents a room ID.
-        RoomId(Box<RoomId>),
+        RoomId(OwnedRoomId),
 
         /// Represents a user ID.
-        UserId(Box<UserId>),
+        UserId(OwnedUserId),
     }
 }
diff --git a/crates/ruma-client-api/src/server/get_user_info.rs b/crates/ruma-client-api/src/server/get_user_info.rs
index f3fa0d25..18394c04 100644
--- a/crates/ruma-client-api/src/server/get_user_info.rs
+++ b/crates/ruma-client-api/src/server/get_user_info.rs
@@ -7,7 +7,7 @@ pub mod v3 {
 
     use std::collections::BTreeMap;
 
-    use ruma_common::{api::ruma_api, MilliSecondsSinceUnixEpoch, UserId};
+    use ruma_common::{api::ruma_api, MilliSecondsSinceUnixEpoch, OwnedUserId, UserId};
     use serde::{Deserialize, Serialize};
 
     ruma_api! {
@@ -32,7 +32,7 @@ pub mod v3 {
         response: {
             /// The Matrix user ID of the user.
             #[serde(skip_serializing_if = "Option::is_none")]
-            pub user_id: Option<Box<UserId>>,
+            pub user_id: Option<OwnedUserId>,
 
             /// A map of the user's device identifiers to information about that device.
             #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
diff --git a/crates/ruma-client-api/src/session/login.rs b/crates/ruma-client-api/src/session/login.rs
index 7c48f0c9..7fdb53e9 100644
--- a/crates/ruma-client-api/src/session/login.rs
+++ b/crates/ruma-client-api/src/session/login.rs
@@ -8,7 +8,7 @@ pub mod v3 {
     use ruma_common::{
         api::ruma_api,
         serde::{Incoming, JsonObject},
-        DeviceId, ServerName, UserId,
+        DeviceId, OwnedDeviceId, OwnedServerName, OwnedUserId,
     };
     use serde::{
         de::{self, DeserializeOwned},
@@ -48,7 +48,7 @@ pub mod v3 {
 
         response: {
             /// The fully-qualified Matrix ID that has been registered.
-            pub user_id: Box<UserId>,
+            pub user_id: OwnedUserId,
 
             /// An access token for the account.
             pub access_token: String,
@@ -58,13 +58,13 @@ pub mod v3 {
             /// Deprecated: Clients should instead use the `user_id.server_name()`
             /// method if they require it.
             #[serde(skip_serializing_if = "Option::is_none")]
-            pub home_server: Option<Box<ServerName>>,
+            pub home_server: Option<OwnedServerName>,
 
             /// ID of the logged-in device.
             ///
             /// Will be the same as the corresponding parameter in the request, if one was
             /// specified.
-            pub device_id: Box<DeviceId>,
+            pub device_id: OwnedDeviceId,
 
             /// Client configuration provided by the server.
             ///
@@ -85,7 +85,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given user ID, access token and device ID.
-        pub fn new(user_id: Box<UserId>, access_token: String, device_id: Box<DeviceId>) -> Self {
+        pub fn new(user_id: OwnedUserId, access_token: String, device_id: OwnedDeviceId) -> Self {
             Self { user_id, access_token, home_server: None, device_id, well_known: None }
         }
     }
diff --git a/crates/ruma-client-api/src/space.rs b/crates/ruma-client-api/src/space.rs
index 51082a5b..f2039501 100644
--- a/crates/ruma-client-api/src/space.rs
+++ b/crates/ruma-client-api/src/space.rs
@@ -9,7 +9,7 @@ use ruma_common::{
     events::space::child::HierarchySpaceChildEvent,
     room::RoomType,
     serde::{Raw, StringEnum},
-    MxcUri, RoomAliasId, RoomId, RoomName,
+    MxcUri, OwnedRoomAliasId, OwnedRoomId, RoomName,
 };
 use serde::{Deserialize, Serialize};
 
@@ -30,7 +30,7 @@ pub struct SpaceHierarchyRoomsChunk {
         feature = "compat",
         serde(default, deserialize_with = "ruma_common::serde::empty_string_as_none")
     )]
-    pub canonical_alias: Option<Box<RoomAliasId>>,
+    pub canonical_alias: Option<OwnedRoomAliasId>,
 
     /// The name of the room, if any.
     #[serde(skip_serializing_if = "Option::is_none")]
@@ -40,7 +40,7 @@ pub struct SpaceHierarchyRoomsChunk {
     pub num_joined_members: UInt,
 
     /// The ID of the room.
-    pub room_id: Box<RoomId>,
+    pub room_id: OwnedRoomId,
 
     /// The topic of the room, if any.
     #[serde(skip_serializing_if = "Option::is_none")]
@@ -89,7 +89,7 @@ pub struct SpaceHierarchyRoomsChunkInit {
     pub num_joined_members: UInt,
 
     /// The ID of the room.
-    pub room_id: Box<RoomId>,
+    pub room_id: OwnedRoomId,
 
     /// Whether the room may be viewed by guest users without joining.
     pub world_readable: bool,
diff --git a/crates/ruma-client-api/src/state/send_state_event.rs b/crates/ruma-client-api/src/state/send_state_event.rs
index 64260b5b..4c77090e 100644
--- a/crates/ruma-client-api/src/state/send_state_event.rs
+++ b/crates/ruma-client-api/src/state/send_state_event.rs
@@ -9,7 +9,7 @@ pub mod v3 {
         api::ruma_api,
         events::{AnyStateEventContent, StateEventContent, StateEventType},
         serde::{Incoming, Raw},
-        EventId, RoomId,
+        OwnedEventId, RoomId,
     };
     use serde_json::value::to_raw_value as to_raw_json_value;
 
@@ -27,7 +27,7 @@ pub mod v3 {
 
         response: {
             /// A unique identifier for the event.
-            pub event_id: Box<EventId>,
+            pub event_id: OwnedEventId,
         }
 
         error: crate::Error
@@ -90,7 +90,7 @@ pub mod v3 {
 
     impl Response {
         /// Creates a new `Response` with the given event id.
-        pub fn new(event_id: Box<EventId>) -> Self {
+        pub fn new(event_id: OwnedEventId) -> Self {
             Self { event_id }
         }
     }
diff --git a/crates/ruma-client-api/src/sync/sync_events.rs b/crates/ruma-client-api/src/sync/sync_events.rs
index 6d1ddcc8..e5e7149f 100644
--- a/crates/ruma-client-api/src/sync/sync_events.rs
+++ b/crates/ruma-client-api/src/sync/sync_events.rs
@@ -17,7 +17,7 @@ pub mod v3 {
         },
         presence::PresenceState,
         serde::{Incoming, Raw},
-        DeviceKeyAlgorithm, RoomId, UserId,
+        DeviceKeyAlgorithm, OwnedRoomId, OwnedUserId,
     };
     use serde::{Deserialize, Serialize};
 
@@ -179,19 +179,19 @@ pub mod v3 {
     pub struct Rooms {
         /// The rooms that the user has left or been banned from.
         #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-        pub leave: BTreeMap<Box<RoomId>, LeftRoom>,
+        pub leave: BTreeMap<OwnedRoomId, LeftRoom>,
 
         /// The rooms that the user has joined.
         #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-        pub join: BTreeMap<Box<RoomId>, JoinedRoom>,
+        pub join: BTreeMap<OwnedRoomId, JoinedRoom>,
 
         /// The rooms that the user has been invited to.
         #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-        pub invite: BTreeMap<Box<RoomId>, InvitedRoom>,
+        pub invite: BTreeMap<OwnedRoomId, InvitedRoom>,
 
         /// The rooms that the user has knocked on.
         #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-        pub knock: BTreeMap<Box<RoomId>, KnockedRoom>,
+        pub knock: BTreeMap<OwnedRoomId, KnockedRoom>,
     }
 
     impl Rooms {
@@ -590,12 +590,12 @@ pub mod v3 {
         /// List of users who have updated their device identity keys or who now
         /// share an encrypted room with the client since the previous sync
         #[serde(default, skip_serializing_if = "Vec::is_empty")]
-        pub changed: Vec<Box<UserId>>,
+        pub changed: Vec<OwnedUserId>,
 
         /// List of users who no longer share encrypted rooms since the previous sync
         /// response.
         #[serde(default, skip_serializing_if = "Vec::is_empty")]
-        pub left: Vec<Box<UserId>>,
+        pub left: Vec<OwnedUserId>,
     }
 
     impl DeviceLists {
diff --git a/crates/ruma-client-api/src/to_device/send_event_to_device.rs b/crates/ruma-client-api/src/to_device/send_event_to_device.rs
index 64ac3aa1..8cf40829 100644
--- a/crates/ruma-client-api/src/to_device/send_event_to_device.rs
+++ b/crates/ruma-client-api/src/to_device/send_event_to_device.rs
@@ -9,7 +9,7 @@ pub mod v3 {
 
     use ruma_common::{
         api::ruma_api, events::AnyToDeviceEventContent, serde::Raw,
-        to_device::DeviceIdOrAllDevices, TransactionId, UserId,
+        to_device::DeviceIdOrAllDevices, OwnedUserId, TransactionId,
     };
 
     ruma_api! {
@@ -64,5 +64,5 @@ pub mod v3 {
     ///
     /// Represented as a map of `{ user-ids => { device-ids => message-content } }`.
     pub type Messages =
-        BTreeMap<Box<UserId>, BTreeMap<DeviceIdOrAllDevices, Raw<AnyToDeviceEventContent>>>;
+        BTreeMap<OwnedUserId, BTreeMap<DeviceIdOrAllDevices, Raw<AnyToDeviceEventContent>>>;
 }
diff --git a/crates/ruma-client-api/src/uiaa.rs b/crates/ruma-client-api/src/uiaa.rs
index 98f7fa86..26f31e7a 100644
--- a/crates/ruma-client-api/src/uiaa.rs
+++ b/crates/ruma-client-api/src/uiaa.rs
@@ -12,7 +12,7 @@ use ruma_common::{
     },
     serde::{from_raw_json_value, Incoming, JsonObject, StringEnum},
     thirdparty::Medium,
-    ClientSecret, SessionId,
+    ClientSecret, OwnedSessionId,
 };
 use serde::{
     de::{self, DeserializeOwned},
@@ -607,7 +607,7 @@ impl IncomingUserIdentifier {
 #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
 pub struct ThirdpartyIdCredentials {
     /// Identity server session ID.
-    pub sid: Box<SessionId>,
+    pub sid: OwnedSessionId,
 
     /// Identity server client secret.
     pub client_secret: Box<ClientSecret>,
@@ -623,7 +623,7 @@ impl ThirdpartyIdCredentials {
     /// Creates a new `ThirdpartyIdCredentials` with the given session ID, client secret, identity
     /// server address and access token.
     pub fn new(
-        sid: Box<SessionId>,
+        sid: OwnedSessionId,
         client_secret: Box<ClientSecret>,
         id_server: String,
         id_access_token: String,
diff --git a/crates/ruma-client-api/src/user_directory/search_users.rs b/crates/ruma-client-api/src/user_directory/search_users.rs
index 57f8c9bd..9e55783d 100644
--- a/crates/ruma-client-api/src/user_directory/search_users.rs
+++ b/crates/ruma-client-api/src/user_directory/search_users.rs
@@ -6,7 +6,7 @@ pub mod v3 {
     //! [spec]: https://spec.matrix.org/v1.2/client-server-api/#post_matrixclientv3user_directorysearch
 
     use js_int::{uint, UInt};
-    use ruma_common::{api::ruma_api, MxcUri, UserId};
+    use ruma_common::{api::ruma_api, MxcUri, OwnedUserId};
     use serde::{Deserialize, Serialize};
 
     ruma_api! {
@@ -78,7 +78,7 @@ pub mod v3 {
     #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
     pub struct User {
         /// The user's matrix user ID.
-        pub user_id: Box<UserId>,
+        pub user_id: OwnedUserId,
 
         /// The display name of the user, if one exists.
         #[serde(skip_serializing_if = "Option::is_none")]
@@ -98,7 +98,7 @@ pub mod v3 {
 
     impl User {
         /// Create a new `User` with the given `UserId`.
-        pub fn new(user_id: Box<UserId>) -> Self {
+        pub fn new(user_id: OwnedUserId) -> Self {
             Self { user_id, display_name: None, avatar_url: None }
         }
     }
diff --git a/examples/joke_bot/src/main.rs b/examples/joke_bot/src/main.rs
index a485981f..da241486 100644
--- a/examples/joke_bot/src/main.rs
+++ b/examples/joke_bot/src/main.rs
@@ -13,7 +13,7 @@ use ruma::{
     },
     presence::PresenceState,
     serde::Raw,
-    RoomId, TransactionId, UserId,
+    OwnedUserId, RoomId, TransactionId, UserId,
 };
 use serde_json::Value as JsonValue;
 use tokio::fs;
@@ -223,7 +223,7 @@ async fn read_state() -> io::Result<Option<State>> {
 
 struct Config {
     homeserver: String,
-    username: Box<UserId>,
+    username: OwnedUserId,
     password: Option<String>,
 }