diff --git a/src/api/appservice_server.rs b/src/api/appservice_server.rs
index 082a1bc2..213e4c09 100644
--- a/src/api/appservice_server.rs
+++ b/src/api/appservice_server.rs
@@ -1,23 +1,29 @@
 use crate::{services, utils, Error, Result};
 use bytes::BytesMut;
-use ruma::api::{IncomingResponse, MatrixVersion, OutgoingRequest, SendAccessToken};
+use ruma::api::{
+    appservice::Registration, IncomingResponse, MatrixVersion, OutgoingRequest, SendAccessToken,
+};
 use std::{fmt::Debug, mem, time::Duration};
 use tracing::warn;
 
+/// Sends a request to an appservice
+///
+/// Only returns None if there is no url specified in the appservice registration file
 #[tracing::instrument(skip(request))]
 pub(crate) async fn send_request<T: OutgoingRequest>(
-    registration: serde_yaml::Value,
+    registration: Registration,
     request: T,
-) -> Result<T::IncomingResponse>
+) -> Option<Result<T::IncomingResponse>>
 where
     T: Debug,
 {
-    let destination = registration.get("url").unwrap().as_str().unwrap();
-    let hs_token = registration.get("hs_token").unwrap().as_str().unwrap();
+    let destination = registration.url?;
+
+    let hs_token = registration.hs_token.as_str();
 
     let mut http_request = request
         .try_into_http_request::<BytesMut>(
-            destination,
+            &destination,
             SendAccessToken::IfRequired(hs_token),
             &[MatrixVersion::V1_0],
         )
@@ -55,11 +61,9 @@ where
         Err(e) => {
             warn!(
                 "Could not send request to appservice {:?} at {}: {}",
-                registration.get("id"),
-                destination,
-                e
+                registration.id, destination, e
             );
-            return Err(e.into());
+            return Some(Err(e.into()));
         }
     };
 
@@ -95,11 +99,12 @@ where
             .body(body)
             .expect("reqwest body is valid http body"),
     );
-    response.map_err(|_| {
+
+    Some(response.map_err(|_| {
         warn!(
             "Appservice returned invalid response bytes {}\n{}",
             destination, url
         );
         Error::BadServerResponse("Server returned bad response.")
-    })
+    }))
 }
diff --git a/src/api/client_server/alias.rs b/src/api/client_server/alias.rs
index 7660ca2f..bc3a5e25 100644
--- a/src/api/client_server/alias.rs
+++ b/src/api/client_server/alias.rs
@@ -1,6 +1,5 @@
 use crate::{services, Error, Result, Ruma};
 use rand::seq::SliceRandom;
-use regex::Regex;
 use ruma::{
     api::{
         appservice,
@@ -101,31 +100,22 @@ pub(crate) async fn get_alias_helper(
     match services().rooms.alias.resolve_local_alias(&room_alias)? {
         Some(r) => room_id = Some(r),
         None => {
-            for (_id, registration) in services().appservice.all()? {
-                let aliases = registration
-                    .get("namespaces")
-                    .and_then(|ns| ns.get("aliases"))
-                    .and_then(|aliases| aliases.as_sequence())
-                    .map_or_else(Vec::new, |aliases| {
-                        aliases
-                            .iter()
-                            .filter_map(|aliases| Regex::new(aliases.get("regex")?.as_str()?).ok())
-                            .collect::<Vec<_>>()
-                    });
-
-                if aliases
-                    .iter()
-                    .any(|aliases| aliases.is_match(room_alias.as_str()))
-                    && services()
+            for appservice in services().appservice.read().await.values() {
+                if appservice.aliases.is_match(room_alias.as_str())
+                    && if let Some(opt_result) = services()
                         .sending
                         .send_appservice_request(
-                            registration,
+                            appservice.registration.clone(),
                             appservice::query::query_room_alias::v1::Request {
                                 room_alias: room_alias.clone(),
                             },
                         )
                         .await
-                        .is_ok()
+                    {
+                        opt_result.is_ok()
+                    } else {
+                        false
+                    }
                 {
                     room_id = Some(
                         services()
diff --git a/src/api/ruma_wrapper/axum.rs b/src/api/ruma_wrapper/axum.rs
index c6a19578..a5ef7f7e 100644
--- a/src/api/ruma_wrapper/axum.rs
+++ b/src/api/ruma_wrapper/axum.rs
@@ -80,26 +80,20 @@ where
 
         let mut json_body = serde_json::from_slice::<CanonicalJsonValue>(&body).ok();
 
-        let appservices = services().appservice.all().unwrap();
-        let appservice_registration = appservices.iter().find(|(_id, registration)| {
-            registration
-                .get("as_token")
-                .and_then(|as_token| as_token.as_str())
-                .map_or(false, |as_token| token == Some(as_token))
-        });
+        let appservice_registration = if let Some(token) = token {
+            services().appservice.find_from_token(token).await
+        } else {
+            None
+        };
 
         let (sender_user, sender_device, sender_servername, from_appservice) =
-            if let Some((_id, registration)) = appservice_registration {
+            if let Some(info) = appservice_registration {
                 match metadata.authentication {
                     AuthScheme::AccessToken => {
                         let user_id = query_params.user_id.map_or_else(
                             || {
                                 UserId::parse_with_server_name(
-                                    registration
-                                        .get("sender_localpart")
-                                        .unwrap()
-                                        .as_str()
-                                        .unwrap(),
+                                    info.registration.sender_localpart.as_str(),
                                     services().globals.server_name(),
                                 )
                                 .unwrap()
diff --git a/src/database/key_value/appservice.rs b/src/database/key_value/appservice.rs
index 9a821a65..b547e66a 100644
--- a/src/database/key_value/appservice.rs
+++ b/src/database/key_value/appservice.rs
@@ -1,18 +1,15 @@
+use ruma::api::appservice::Registration;
+
 use crate::{database::KeyValueDatabase, service, utils, Error, Result};
 
 impl service::appservice::Data for KeyValueDatabase {
     /// Registers an appservice and returns the ID to the caller
-    fn register_appservice(&self, yaml: serde_yaml::Value) -> Result<String> {
-        // TODO: Rumaify
-        let id = yaml.get("id").unwrap().as_str().unwrap();
+    fn register_appservice(&self, yaml: Registration) -> Result<String> {
+        let id = yaml.id.as_str();
         self.id_appserviceregistrations.insert(
             id.as_bytes(),
             serde_yaml::to_string(&yaml).unwrap().as_bytes(),
         )?;
-        self.cached_registrations
-            .write()
-            .unwrap()
-            .insert(id.to_owned(), yaml.to_owned());
 
         Ok(id.to_owned())
     }
@@ -25,33 +22,18 @@ impl service::appservice::Data for KeyValueDatabase {
     fn unregister_appservice(&self, service_name: &str) -> Result<()> {
         self.id_appserviceregistrations
             .remove(service_name.as_bytes())?;
-        self.cached_registrations
-            .write()
-            .unwrap()
-            .remove(service_name);
         Ok(())
     }
 
-    fn get_registration(&self, id: &str) -> Result<Option<serde_yaml::Value>> {
-        self.cached_registrations
-            .read()
-            .unwrap()
-            .get(id)
-            .map_or_else(
-                || {
-                    self.id_appserviceregistrations
-                        .get(id.as_bytes())?
-                        .map(|bytes| {
-                            serde_yaml::from_slice(&bytes).map_err(|_| {
-                                Error::bad_database(
-                                    "Invalid registration bytes in id_appserviceregistrations.",
-                                )
-                            })
-                        })
-                        .transpose()
-                },
-                |r| Ok(Some(r.clone())),
-            )
+    fn get_registration(&self, id: &str) -> Result<Option<Registration>> {
+        self.id_appserviceregistrations
+            .get(id.as_bytes())?
+            .map(|bytes| {
+                serde_yaml::from_slice(&bytes).map_err(|_| {
+                    Error::bad_database("Invalid registration bytes in id_appserviceregistrations.")
+                })
+            })
+            .transpose()
     }
 
     fn iter_ids<'a>(&'a self) -> Result<Box<dyn Iterator<Item = Result<String>> + 'a>> {
@@ -64,7 +46,7 @@ impl service::appservice::Data for KeyValueDatabase {
         )))
     }
 
-    fn all(&self) -> Result<Vec<(String, serde_yaml::Value)>> {
+    fn all(&self) -> Result<Vec<(String, Registration)>> {
         self.iter_ids()?
             .filter_map(|id| id.ok())
             .map(move |id| {
diff --git a/src/database/key_value/rooms/state_cache.rs b/src/database/key_value/rooms/state_cache.rs
index 3dcaf4ae..49e3842b 100644
--- a/src/database/key_value/rooms/state_cache.rs
+++ b/src/database/key_value/rooms/state_cache.rs
@@ -1,13 +1,16 @@
 use std::{collections::HashSet, sync::Arc};
 
-use regex::Regex;
 use ruma::{
     events::{AnyStrippedStateEvent, AnySyncStateEvent},
     serde::Raw,
     OwnedRoomId, OwnedServerName, OwnedUserId, RoomId, ServerName, UserId,
 };
 
-use crate::{database::KeyValueDatabase, service, services, utils, Error, Result};
+use crate::{
+    database::KeyValueDatabase,
+    service::{self, appservice::RegistrationInfo},
+    services, utils, Error, Result,
+};
 
 impl service::rooms::state_cache::Data for KeyValueDatabase {
     fn mark_as_once_joined(&self, user_id: &UserId, room_id: &RoomId) -> Result<()> {
@@ -184,46 +187,28 @@ impl service::rooms::state_cache::Data for KeyValueDatabase {
     }
 
     #[tracing::instrument(skip(self, room_id, appservice))]
-    fn appservice_in_room(
-        &self,
-        room_id: &RoomId,
-        appservice: &(String, serde_yaml::Value),
-    ) -> Result<bool> {
+    fn appservice_in_room(&self, room_id: &RoomId, appservice: &RegistrationInfo) -> Result<bool> {
         let maybe = self
             .appservice_in_room_cache
             .read()
             .unwrap()
             .get(room_id)
-            .and_then(|map| map.get(&appservice.0))
+            .and_then(|map| map.get(&appservice.registration.id))
             .copied();
 
         if let Some(b) = maybe {
             Ok(b)
-        } else if let Some(namespaces) = appservice.1.get("namespaces") {
-            let users = namespaces
-                .get("users")
-                .and_then(|users| users.as_sequence())
-                .map_or_else(Vec::new, |users| {
-                    users
-                        .iter()
-                        .filter_map(|users| Regex::new(users.get("regex")?.as_str()?).ok())
-                        .collect::<Vec<_>>()
-                });
-
-            let bridge_user_id = appservice
-                .1
-                .get("sender_localpart")
-                .and_then(|string| string.as_str())
-                .and_then(|string| {
-                    UserId::parse_with_server_name(string, services().globals.server_name()).ok()
-                });
+        } else {
+            let bridge_user_id = UserId::parse_with_server_name(
+                appservice.registration.sender_localpart.as_str(),
+                services().globals.server_name(),
+            )
+            .ok();
 
             let in_room = bridge_user_id
                 .map_or(false, |id| self.is_joined(&id, room_id).unwrap_or(false))
                 || self.room_members(room_id).any(|userid| {
-                    userid.map_or(false, |userid| {
-                        users.iter().any(|r| r.is_match(userid.as_str()))
-                    })
+                    userid.map_or(false, |userid| appservice.users.is_match(userid.as_str()))
                 });
 
             self.appservice_in_room_cache
@@ -231,11 +216,9 @@ impl service::rooms::state_cache::Data for KeyValueDatabase {
                 .unwrap()
                 .entry(room_id.to_owned())
                 .or_default()
-                .insert(appservice.0.clone(), in_room);
+                .insert(appservice.registration.id.clone(), in_room);
 
             Ok(in_room)
-        } else {
-            Ok(false)
         }
     }
 
diff --git a/src/database/mod.rs b/src/database/mod.rs
index 0960dc96..41da857c 100644
--- a/src/database/mod.rs
+++ b/src/database/mod.rs
@@ -8,6 +8,7 @@ use crate::{
 use abstraction::{KeyValueDatabaseEngine, KvTree};
 use directories::ProjectDirs;
 use lru_cache::LruCache;
+
 use ruma::{
     events::{
         push_rules::{PushRulesEvent, PushRulesEventContent},
@@ -160,7 +161,6 @@ pub struct KeyValueDatabase {
     //pub pusher: pusher::PushData,
     pub(super) senderkey_pusher: Arc<dyn KvTree>,
 
-    pub(super) cached_registrations: Arc<RwLock<HashMap<String, serde_yaml::Value>>>,
     pub(super) pdu_cache: Mutex<LruCache<OwnedEventId, Arc<PduEvent>>>,
     pub(super) shorteventid_cache: Mutex<LruCache<u64, Arc<EventId>>>,
     pub(super) auth_chain_cache: Mutex<LruCache<Vec<u64>, Arc<HashSet<u64>>>>,
@@ -368,7 +368,6 @@ impl KeyValueDatabase {
             global: builder.open_tree("global")?,
             server_signingkeys: builder.open_tree("server_signingkeys")?,
 
-            cached_registrations: Arc::new(RwLock::new(HashMap::new())),
             pdu_cache: Mutex::new(LruCache::new(
                 config
                     .pdu_cache_capacity
diff --git a/src/service/admin/mod.rs b/src/service/admin/mod.rs
index d99be878..f2f60a7a 100644
--- a/src/service/admin/mod.rs
+++ b/src/service/admin/mod.rs
@@ -8,6 +8,7 @@ use std::{
 use clap::Parser;
 use regex::Regex;
 use ruma::{
+    api::appservice::Registration,
     events::{
         room::{
             canonical_alias::RoomCanonicalAliasEventContent,
@@ -335,10 +336,9 @@ impl Service {
                 if body.len() > 2 && body[0].trim() == "```" && body.last().unwrap().trim() == "```"
                 {
                     let appservice_config = body[1..body.len() - 1].join("\n");
-                    let parsed_config =
-                        serde_yaml::from_str::<serde_yaml::Value>(&appservice_config);
+                    let parsed_config = serde_yaml::from_str::<Registration>(&appservice_config);
                     match parsed_config {
-                        Ok(yaml) => match services().appservice.register_appservice(yaml) {
+                        Ok(yaml) => match services().appservice.register_appservice(yaml).await {
                             Ok(id) => RoomMessageEventContent::text_plain(format!(
                                 "Appservice registered with ID: {id}."
                             )),
@@ -361,6 +361,7 @@ impl Service {
             } => match services()
                 .appservice
                 .unregister_appservice(&appservice_identifier)
+                .await
             {
                 Ok(()) => RoomMessageEventContent::text_plain("Appservice unregistered."),
                 Err(e) => RoomMessageEventContent::text_plain(format!(
@@ -368,25 +369,13 @@ impl Service {
                 )),
             },
             AdminCommand::ListAppservices => {
-                if let Ok(appservices) = services()
-                    .appservice
-                    .iter_ids()
-                    .map(|ids| ids.collect::<Vec<_>>())
-                {
-                    let count = appservices.len();
-                    let output = format!(
-                        "Appservices ({}): {}",
-                        count,
-                        appservices
-                            .into_iter()
-                            .filter_map(|r| r.ok())
-                            .collect::<Vec<_>>()
-                            .join(", ")
-                    );
-                    RoomMessageEventContent::text_plain(output)
-                } else {
-                    RoomMessageEventContent::text_plain("Failed to get appservices.")
-                }
+                let appservices = services().appservice.iter_ids().await;
+                let output = format!(
+                    "Appservices ({}): {}",
+                    appservices.len(),
+                    appservices.join(", ")
+                );
+                RoomMessageEventContent::text_plain(output)
             }
             AdminCommand::ListRooms => {
                 let room_ids = services().rooms.metadata.iter_ids();
diff --git a/src/service/appservice/data.rs b/src/service/appservice/data.rs
index 744f0f94..ab19a50c 100644
--- a/src/service/appservice/data.rs
+++ b/src/service/appservice/data.rs
@@ -1,8 +1,10 @@
+use ruma::api::appservice::Registration;
+
 use crate::Result;
 
 pub trait Data: Send + Sync {
     /// Registers an appservice and returns the ID to the caller
-    fn register_appservice(&self, yaml: serde_yaml::Value) -> Result<String>;
+    fn register_appservice(&self, yaml: Registration) -> Result<String>;
 
     /// Remove an appservice registration
     ///
@@ -11,9 +13,9 @@ pub trait Data: Send + Sync {
     /// * `service_name` - the name you send to register the service previously
     fn unregister_appservice(&self, service_name: &str) -> Result<()>;
 
-    fn get_registration(&self, id: &str) -> Result<Option<serde_yaml::Value>>;
+    fn get_registration(&self, id: &str) -> Result<Option<Registration>>;
 
     fn iter_ids<'a>(&'a self) -> Result<Box<dyn Iterator<Item = Result<String>> + 'a>>;
 
-    fn all(&self) -> Result<Vec<(String, serde_yaml::Value)>>;
+    fn all(&self) -> Result<Vec<(String, Registration)>>;
 }
diff --git a/src/service/appservice/mod.rs b/src/service/appservice/mod.rs
index 3052964d..4bda8961 100644
--- a/src/service/appservice/mod.rs
+++ b/src/service/appservice/mod.rs
@@ -1,37 +1,183 @@
 mod data;
 
+use std::collections::BTreeMap;
+
 pub use data::Data;
 
-use crate::Result;
+use futures_util::Future;
+use regex::RegexSet;
+use ruma::api::appservice::{Namespace, Registration};
+use tokio::sync::RwLock;
+
+use crate::{services, Result};
+
+/// Compiled regular expressions for a namespace.
+#[derive(Clone, Debug)]
+pub struct NamespaceRegex {
+    pub exclusive: Option<RegexSet>,
+    pub non_exclusive: Option<RegexSet>,
+}
+
+impl NamespaceRegex {
+    /// Checks if this namespace has rights to a namespace
+    pub fn is_match(&self, heystack: &str) -> bool {
+        if self.is_exclusive_match(heystack) {
+            return true;
+        }
+
+        if let Some(non_exclusive) = &self.non_exclusive {
+            if non_exclusive.is_match(heystack) {
+                return true;
+            }
+        }
+        false
+    }
+
+    /// Checks if this namespace has exlusive rights to a namespace
+    pub fn is_exclusive_match(&self, heystack: &str) -> bool {
+        if let Some(exclusive) = &self.exclusive {
+            if exclusive.is_match(heystack) {
+                return true;
+            }
+        }
+        false
+    }
+}
+
+impl TryFrom<Vec<Namespace>> for NamespaceRegex {
+    fn try_from(value: Vec<Namespace>) -> Result<Self, regex::Error> {
+        let mut exclusive = vec![];
+        let mut non_exclusive = vec![];
+
+        for namespace in value {
+            if namespace.exclusive {
+                exclusive.push(namespace.regex);
+            } else {
+                non_exclusive.push(namespace.regex);
+            }
+        }
+
+        Ok(NamespaceRegex {
+            exclusive: if exclusive.is_empty() {
+                None
+            } else {
+                Some(RegexSet::new(exclusive)?)
+            },
+            non_exclusive: if non_exclusive.is_empty() {
+                None
+            } else {
+                Some(RegexSet::new(non_exclusive)?)
+            },
+        })
+    }
+
+    type Error = regex::Error;
+}
+
+/// Appservice registration combined with its compiled regular expressions.
+#[derive(Clone, Debug)]
+pub struct RegistrationInfo {
+    pub registration: Registration,
+    pub users: NamespaceRegex,
+    pub aliases: NamespaceRegex,
+    pub rooms: NamespaceRegex,
+}
+
+impl TryFrom<Registration> for RegistrationInfo {
+    fn try_from(value: Registration) -> Result<RegistrationInfo, regex::Error> {
+        Ok(RegistrationInfo {
+            users: value.namespaces.users.clone().try_into()?,
+            aliases: value.namespaces.aliases.clone().try_into()?,
+            rooms: value.namespaces.rooms.clone().try_into()?,
+            registration: value,
+        })
+    }
+
+    type Error = regex::Error;
+}
 
 pub struct Service {
     pub db: &'static dyn Data,
+    registration_info: RwLock<BTreeMap<String, RegistrationInfo>>,
 }
 
 impl Service {
-    /// Registers an appservice and returns the ID to the caller
-    pub fn register_appservice(&self, yaml: serde_yaml::Value) -> Result<String> {
+    pub fn build(db: &'static dyn Data) -> Result<Self> {
+        let mut registration_info = BTreeMap::new();
+        // Inserting registrations into cache
+        for appservice in db.all()? {
+            registration_info.insert(
+                appservice.0,
+                appservice
+                    .1
+                    .try_into()
+                    .expect("Should be validated on registration"),
+            );
+        }
+
+        Ok(Self {
+            db,
+            registration_info: RwLock::new(registration_info),
+        })
+    }
+    /// Registers an appservice and returns the ID to the caller.
+    pub async fn register_appservice(&self, yaml: Registration) -> Result<String> {
+        services()
+            .appservice
+            .registration_info
+            .write()
+            .await
+            .insert(yaml.id.clone(), yaml.clone().try_into()?);
+
         self.db.register_appservice(yaml)
     }
 
-    /// Remove an appservice registration
+    /// Removes an appservice registration.
     ///
     /// # Arguments
     ///
     /// * `service_name` - the name you send to register the service previously
-    pub fn unregister_appservice(&self, service_name: &str) -> Result<()> {
+    pub async fn unregister_appservice(&self, service_name: &str) -> Result<()> {
+        services()
+            .appservice
+            .registration_info
+            .write()
+            .await
+            .remove(service_name);
+
         self.db.unregister_appservice(service_name)
     }
 
-    pub fn get_registration(&self, id: &str) -> Result<Option<serde_yaml::Value>> {
-        self.db.get_registration(id)
+    pub async fn get_registration(&self, id: &str) -> Option<Registration> {
+        self.registration_info
+            .read()
+            .await
+            .get(id)
+            .cloned()
+            .map(|info| info.registration)
     }
 
-    pub fn iter_ids(&self) -> Result<impl Iterator<Item = Result<String>> + '_> {
-        self.db.iter_ids()
+    pub async fn iter_ids(&self) -> Vec<String> {
+        self.registration_info
+            .read()
+            .await
+            .keys()
+            .cloned()
+            .collect()
     }
 
-    pub fn all(&self) -> Result<Vec<(String, serde_yaml::Value)>> {
-        self.db.all()
+    pub async fn find_from_token(&self, token: &str) -> Option<RegistrationInfo> {
+        self.read()
+            .await
+            .values()
+            .find(|info| info.registration.as_token == token)
+            .cloned()
+    }
+
+    pub fn read(
+        &self,
+    ) -> impl Future<Output = tokio::sync::RwLockReadGuard<'_, BTreeMap<String, RegistrationInfo>>>
+    {
+        self.registration_info.read()
     }
 }
diff --git a/src/service/mod.rs b/src/service/mod.rs
index ba1ae1c8..4c11bc18 100644
--- a/src/service/mod.rs
+++ b/src/service/mod.rs
@@ -57,7 +57,7 @@ impl Services {
         config: Config,
     ) -> Result<Self> {
         Ok(Self {
-            appservice: appservice::Service { db },
+            appservice: appservice::Service::build(db)?,
             pusher: pusher::Service { db },
             rooms: rooms::Service {
                 alias: rooms::alias::Service { db },
diff --git a/src/service/rooms/state_cache/data.rs b/src/service/rooms/state_cache/data.rs
index 8921909f..b511919a 100644
--- a/src/service/rooms/state_cache/data.rs
+++ b/src/service/rooms/state_cache/data.rs
@@ -1,6 +1,6 @@
 use std::{collections::HashSet, sync::Arc};
 
-use crate::Result;
+use crate::{service::appservice::RegistrationInfo, Result};
 use ruma::{
     events::{AnyStrippedStateEvent, AnySyncStateEvent},
     serde::Raw,
@@ -22,11 +22,7 @@ pub trait Data: Send + Sync {
 
     fn get_our_real_users(&self, room_id: &RoomId) -> Result<Arc<HashSet<OwnedUserId>>>;
 
-    fn appservice_in_room(
-        &self,
-        room_id: &RoomId,
-        appservice: &(String, serde_yaml::Value),
-    ) -> Result<bool>;
+    fn appservice_in_room(&self, room_id: &RoomId, appservice: &RegistrationInfo) -> Result<bool>;
 
     /// Makes a user forget a room.
     fn forget(&self, room_id: &RoomId, user_id: &UserId) -> Result<()>;
diff --git a/src/service/rooms/state_cache/mod.rs b/src/service/rooms/state_cache/mod.rs
index ef1ad61e..c108695d 100644
--- a/src/service/rooms/state_cache/mod.rs
+++ b/src/service/rooms/state_cache/mod.rs
@@ -16,7 +16,7 @@ use ruma::{
 };
 use tracing::warn;
 
-use crate::{services, Error, Result};
+use crate::{service::appservice::RegistrationInfo, services, Error, Result};
 
 pub struct Service {
     pub db: &'static dyn Data,
@@ -205,7 +205,7 @@ impl Service {
     pub fn appservice_in_room(
         &self,
         room_id: &RoomId,
-        appservice: &(String, serde_yaml::Value),
+        appservice: &RegistrationInfo,
     ) -> Result<bool> {
         self.db.appservice_in_room(room_id, appservice)
     }
diff --git a/src/service/rooms/timeline/mod.rs b/src/service/rooms/timeline/mod.rs
index 097cc82f..379d97fe 100644
--- a/src/service/rooms/timeline/mod.rs
+++ b/src/service/rooms/timeline/mod.rs
@@ -7,7 +7,7 @@ use std::{
 };
 
 pub use data::Data;
-use regex::Regex;
+
 use ruma::{
     api::{client::error::ErrorKind, federation},
     canonical_json::to_canonical_value,
@@ -21,8 +21,7 @@ use ruma::{
     },
     push::{Action, Ruleset, Tweak},
     serde::Base64,
-    state_res,
-    state_res::{Event, RoomVersion},
+    state_res::{self, Event, RoomVersion},
     uint, user_id, CanonicalJsonObject, CanonicalJsonValue, EventId, OwnedEventId, OwnedRoomId,
     OwnedServerName, RoomId, ServerName, UserId,
 };
@@ -33,7 +32,10 @@ use tracing::{error, info, warn};
 
 use crate::{
     api::server_server,
-    service::pdu::{EventHash, PduBuilder},
+    service::{
+        appservice::NamespaceRegex,
+        pdu::{EventHash, PduBuilder},
+    },
     services, utils, Error, PduEvent, Result,
 };
 
@@ -522,15 +524,15 @@ impl Service {
             }
         }
 
-        for appservice in services().appservice.all()? {
+        for appservice in services().appservice.read().await.values() {
             if services()
                 .rooms
                 .state_cache
-                .appservice_in_room(&pdu.room_id, &appservice)?
+                .appservice_in_room(&pdu.room_id, appservice)?
             {
                 services()
                     .sending
-                    .send_pdu_appservice(appservice.0, pdu_id.clone())?;
+                    .send_pdu_appservice(appservice.registration.id.clone(), pdu_id.clone())?;
                 continue;
             }
 
@@ -542,73 +544,41 @@ impl Service {
                     .as_ref()
                     .and_then(|state_key| UserId::parse(state_key.as_str()).ok())
                 {
-                    if let Some(appservice_uid) = appservice
-                        .1
-                        .get("sender_localpart")
-                        .and_then(|string| string.as_str())
-                        .and_then(|string| {
-                            UserId::parse_with_server_name(string, services().globals.server_name())
-                                .ok()
-                        })
-                    {
-                        if state_key_uid == &appservice_uid {
-                            services()
-                                .sending
-                                .send_pdu_appservice(appservice.0, pdu_id.clone())?;
-                            continue;
-                        }
+                    let appservice_uid = appservice.registration.sender_localpart.as_str();
+                    if state_key_uid == appservice_uid {
+                        services().sending.send_pdu_appservice(
+                            appservice.registration.id.clone(),
+                            pdu_id.clone(),
+                        )?;
+                        continue;
                     }
                 }
             }
 
-            if let Some(namespaces) = appservice.1.get("namespaces") {
-                let users = namespaces
-                    .get("users")
-                    .and_then(|users| users.as_sequence())
-                    .map_or_else(Vec::new, |users| {
-                        users
-                            .iter()
-                            .filter_map(|users| Regex::new(users.get("regex")?.as_str()?).ok())
-                            .collect::<Vec<_>>()
-                    });
-                let aliases = namespaces
-                    .get("aliases")
-                    .and_then(|aliases| aliases.as_sequence())
-                    .map_or_else(Vec::new, |aliases| {
-                        aliases
-                            .iter()
-                            .filter_map(|aliases| Regex::new(aliases.get("regex")?.as_str()?).ok())
-                            .collect::<Vec<_>>()
-                    });
-                let rooms = namespaces
-                    .get("rooms")
-                    .and_then(|rooms| rooms.as_sequence());
+            let matching_users = |users: &NamespaceRegex| {
+                appservice.users.is_match(pdu.sender.as_str())
+                    || pdu.kind == TimelineEventType::RoomMember
+                        && pdu
+                            .state_key
+                            .as_ref()
+                            .map_or(false, |state_key| users.is_match(state_key))
+            };
+            let matching_aliases = |aliases: &NamespaceRegex| {
+                services()
+                    .rooms
+                    .alias
+                    .local_aliases_for_room(&pdu.room_id)
+                    .filter_map(|r| r.ok())
+                    .any(|room_alias| aliases.is_match(room_alias.as_str()))
+            };
 
-                let matching_users = |users: &Regex| {
-                    users.is_match(pdu.sender.as_str())
-                        || pdu.kind == TimelineEventType::RoomMember
-                            && pdu
-                                .state_key
-                                .as_ref()
-                                .map_or(false, |state_key| users.is_match(state_key))
-                };
-                let matching_aliases = |aliases: &Regex| {
-                    services()
-                        .rooms
-                        .alias
-                        .local_aliases_for_room(&pdu.room_id)
-                        .filter_map(|r| r.ok())
-                        .any(|room_alias| aliases.is_match(room_alias.as_str()))
-                };
-
-                if aliases.iter().any(matching_aliases)
-                    || rooms.map_or(false, |rooms| rooms.contains(&pdu.room_id.as_str().into()))
-                    || users.iter().any(matching_users)
-                {
-                    services()
-                        .sending
-                        .send_pdu_appservice(appservice.0, pdu_id.clone())?;
-                }
+            if matching_aliases(&appservice.aliases)
+                || appservice.rooms.is_match(pdu.room_id.as_str())
+                || matching_users(&appservice.users)
+            {
+                services()
+                    .sending
+                    .send_pdu_appservice(appservice.registration.id.clone(), pdu_id.clone())?;
             }
         }
 
diff --git a/src/service/sending/mod.rs b/src/service/sending/mod.rs
index f80c4f0a..45cca173 100644
--- a/src/service/sending/mod.rs
+++ b/src/service/sending/mod.rs
@@ -22,7 +22,7 @@ use base64::{engine::general_purpose, Engine as _};
 
 use ruma::{
     api::{
-        appservice,
+        appservice::{self, Registration},
         federation::{
             self,
             transactions::edu::{
@@ -484,11 +484,11 @@ impl Service {
 
                 let permit = services().sending.maximum_requests.acquire().await;
 
-                let response = appservice_server::send_request(
+                let response = match appservice_server::send_request(
                     services()
                         .appservice
                         .get_registration(id)
-                        .map_err(|e| (kind.clone(), e))?
+                        .await
                         .ok_or_else(|| {
                             (
                                 kind.clone(),
@@ -511,8 +511,12 @@ impl Service {
                     },
                 )
                 .await
-                .map(|_response| kind.clone())
-                .map_err(|e| (kind, e));
+                {
+                    None => Ok(kind.clone()),
+                    Some(op_resp) => op_resp
+                        .map(|_response| kind.clone())
+                        .map_err(|e| (kind.clone(), e)),
+                };
 
                 drop(permit);
 
@@ -698,12 +702,15 @@ impl Service {
         response
     }
 
+    /// Sends a request to an appservice
+    ///
+    /// Only returns None if there is no url specified in the appservice registration file
     #[tracing::instrument(skip(self, registration, request))]
     pub async fn send_appservice_request<T: OutgoingRequest>(
         &self,
-        registration: serde_yaml::Value,
+        registration: Registration,
         request: T,
-    ) -> Result<T::IncomingResponse>
+    ) -> Option<Result<T::IncomingResponse>>
     where
         T: Debug,
     {
diff --git a/src/utils/error.rs b/src/utils/error.rs
index 765a31bb..04390283 100644
--- a/src/utils/error.rs
+++ b/src/utils/error.rs
@@ -54,6 +54,11 @@ pub enum Error {
         #[from]
         source: reqwest::Error,
     },
+    #[error("Could build regular expression: {source}")]
+    RegexError {
+        #[from]
+        source: regex::Error,
+    },
     #[error("{0}")]
     FederationError(OwnedServerName, RumaError),
     #[error("Could not do this io: {source}")]