diff --git a/src/action_clients.rs b/src/action_clients.rs
index 1253429..1f109ec 100644
--- a/src/action_clients.rs
+++ b/src/action_clients.rs
@@ -1,5 +1,185 @@
 use super::*;
 
+unsafe impl<T> Send for ActionClient<T> where T: WrappedActionTypeSupport {}
+
+#[derive(Clone)]
+pub struct ActionClient<T>
+where
+    T: WrappedActionTypeSupport,
+{
+    client: Weak<Mutex<WrappedActionClient<T>>>,
+}
+
+#[derive(Clone)]
+pub struct ClientGoal<T>
+where
+    T: WrappedActionTypeSupport,
+{
+    client: Weak<Mutex<WrappedActionClient<T>>>,
+    pub uuid: uuid::Uuid,
+    feedback: Arc<Mutex<Option<mpsc::Receiver<T::Feedback>>>>,
+    result: Arc<Mutex<Option<oneshot::Receiver<T::Result>>>>,
+}
+
+impl<T: 'static> ClientGoal<T>
+where
+    T: WrappedActionTypeSupport,
+{
+    pub fn get_status(&self) -> Result<GoalStatus> {
+        let client = self
+            .client
+            .upgrade()
+            .ok_or(Error::RCL_RET_ACTION_CLIENT_INVALID)?;
+        let client = client.lock().unwrap();
+
+        Ok(client.get_goal_status(&self.uuid))
+    }
+
+    pub fn get_result(&mut self) -> Result<impl Future<Output = Result<T::Result>>> {
+        if let Some(result_channel) = self.result.lock().unwrap().take() {
+            // upgrade to actual ref. if still alive
+            let client = self
+                .client
+                .upgrade()
+                .ok_or(Error::RCL_RET_ACTION_CLIENT_INVALID)?;
+            let mut client = client.lock().unwrap();
+
+            client.send_result_request(self.uuid);
+
+            Ok(result_channel.map_err(|_| Error::RCL_RET_ACTION_CLIENT_INVALID))
+        } else {
+            // todo: error codes...
+            println!("already asked for the result!");
+            Err(Error::RCL_RET_ACTION_CLIENT_INVALID)
+        }
+    }
+
+    pub fn get_feedback(&self) -> Result<impl Stream<Item = T::Feedback> + Unpin> {
+        if let Some(feedback_channel) = self.feedback.lock().unwrap().take() {
+            Ok(feedback_channel)
+        } else {
+            // todo: error codes...
+            println!("someone else owns the feedback consumer stream");
+            Err(Error::RCL_RET_ACTION_CLIENT_INVALID)
+        }
+    }
+
+    pub fn cancel(&self) -> Result<impl Future<Output = Result<()>>> {
+        // upgrade to actual ref. if still alive
+        let client = self
+            .client
+            .upgrade()
+            .ok_or(Error::RCL_RET_ACTION_CLIENT_INVALID)?;
+        let mut client = client.lock().unwrap();
+
+        client.send_cancel_request(&self.uuid)
+    }
+}
+
+impl<T: 'static> ActionClient<T>
+where
+    T: WrappedActionTypeSupport,
+{
+    pub fn send_goal_request(
+        &self,
+        goal: T::Goal,
+    ) -> Result<impl Future<Output = Result<ClientGoal<T>>>>
+    where
+        T: WrappedActionTypeSupport,
+    {
+        // upgrade to actual ref. if still alive
+        let client = self
+            .client
+            .upgrade()
+            .ok_or(Error::RCL_RET_ACTION_CLIENT_INVALID)?;
+        let mut client = client.lock().unwrap();
+
+        let uuid = uuid::Uuid::new_v4();
+        let uuid_msg = unique_identifier_msgs::msg::UUID {
+            uuid: uuid.as_bytes().to_vec(),
+        };
+        let request_msg = T::make_goal_request_msg(uuid_msg, goal);
+        let native_msg = WrappedNativeMsg::<
+            <<T as WrappedActionTypeSupport>::SendGoal as WrappedServiceTypeSupport>::Request,
+        >::from(&request_msg);
+        let mut seq_no = 0i64;
+        let result = unsafe {
+            rcl_action_send_goal_request(&client.rcl_handle, native_msg.void_ptr(), &mut seq_no)
+        };
+
+        // set up channels
+        let (goal_req_sender, goal_req_receiver) = oneshot::channel::<
+            <<T as WrappedActionTypeSupport>::SendGoal as WrappedServiceTypeSupport>::Response,
+        >();
+        let (feedback_sender, feedback_receiver) = mpsc::channel::<T::Feedback>(1);
+        client.feedback_senders.push((uuid, feedback_sender));
+        let (result_sender, result_receiver) = oneshot::channel::<T::Result>();
+        client.result_senders.push((uuid, result_sender));
+
+        if result == RCL_RET_OK as i32 {
+            client
+                .goal_response_channels
+                .push((seq_no, goal_req_sender));
+            // instead of "canceled" we return invalid client.
+            let fut_client = Weak::clone(&self.client);
+            let future = goal_req_receiver
+                .map_err(|_| Error::RCL_RET_ACTION_CLIENT_INVALID)
+                .map(move |r| match r {
+                    Ok(resp) => {
+                        let (accepted, _stamp) = T::destructure_goal_response_msg(resp);
+                        if accepted {
+                            Ok(ClientGoal {
+                                client: fut_client,
+                                uuid,
+                                feedback: Arc::new(Mutex::new(Some(feedback_receiver))),
+                                result: Arc::new(Mutex::new(Some(result_receiver))),
+                            })
+                        } else {
+                            println!("goal rejected");
+                            Err(Error::RCL_RET_ACTION_GOAL_REJECTED)
+                        }
+                    }
+                    Err(e) => Err(e),
+                });
+            Ok(future)
+        } else {
+            eprintln!("coult not send goal request {}", result);
+            Err(Error::from_rcl_error(result))
+        }
+    }
+}
+
+pub fn make_action_client<T>(client: Weak<Mutex<WrappedActionClient<T>>>) -> ActionClient<T>
+where
+    T: WrappedActionTypeSupport,
+{
+    ActionClient {
+        client
+    }
+}
+
+pub fn action_server_available<T>(node: &rcl_node_t, client: &ActionClient<T>) -> Result<bool>
+where
+    T: 'static + WrappedActionTypeSupport,
+{
+    let client = client
+        .client
+        .upgrade()
+        .ok_or(Error::RCL_RET_CLIENT_INVALID)?;
+    let client = client.lock().unwrap();
+    let mut avail = false;
+    let result = unsafe {
+        rcl_action_server_is_available(node, client.handle(), &mut avail)
+    };
+
+    if result == RCL_RET_OK as i32 {
+        Ok(avail)
+    } else {
+        eprintln!("coult not send request {}", result);
+        Err(Error::from_rcl_error(result))
+    }
+}
+
 #[derive(Debug, Copy, Clone, PartialEq)]
 pub enum GoalStatus {
     Unknown,
@@ -342,3 +522,29 @@ where
         }
     }
 }
+
+pub fn create_action_client_helper(
+    node: &mut rcl_node_t,
+    action_name: &str,
+    action_ts: *const rosidl_action_type_support_t,
+) -> Result<rcl_action_client_t> {
+    let mut client_handle = unsafe { rcl_action_get_zero_initialized_client() };
+    let action_name_c_string =
+        CString::new(action_name).map_err(|_| Error::RCL_RET_INVALID_ARGUMENT)?;
+
+    let result = unsafe {
+        let client_options = rcl_action_client_get_default_options();
+        rcl_action_client_init(
+            &mut client_handle,
+            node,
+            action_ts,
+            action_name_c_string.as_ptr(),
+            &client_options,
+        )
+    };
+    if result == RCL_RET_OK as i32 {
+        Ok(client_handle)
+    } else {
+        Err(Error::from_rcl_error(result))
+    }
+}
diff --git a/src/action_servers.rs b/src/action_servers.rs
index 77db735..b70330b 100644
--- a/src/action_servers.rs
+++ b/src/action_servers.rs
@@ -564,3 +564,32 @@ where
         Ok(())
     }
 }
+
+pub fn create_action_server_helper(
+    node: &mut rcl_node_t,
+    action_name: &str,
+    clock_handle: *mut rcl_clock_t,
+    action_ts: *const rosidl_action_type_support_t,
+) -> Result<rcl_action_server_t> {
+    let mut server_handle = unsafe { rcl_action_get_zero_initialized_server() };
+    let action_name_c_string =
+        CString::new(action_name).map_err(|_| Error::RCL_RET_INVALID_ARGUMENT)?;
+
+    let result = unsafe {
+        let server_options = rcl_action_server_get_default_options();
+
+        rcl_action_server_init(
+            &mut server_handle,
+            node,
+            clock_handle,
+            action_ts,
+            action_name_c_string.as_ptr(),
+            &server_options,
+        )
+    };
+    if result == RCL_RET_OK as i32 {
+        Ok(server_handle)
+    } else {
+        Err(Error::from_rcl_error(result))
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index ee83d93..a64e996 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -52,7 +52,6 @@ use action_clients::*;
 
 mod action_servers;
 use action_servers::*;
-
 pub use action_servers::ServerGoal;
 
 mod context;
@@ -65,55 +64,6 @@ pub use parameters::ParameterValue;
 mod clocks;
 pub use clocks::{Clock, ClockType};
 
-/// Encapsulates a service request. In contrast to having a simply callback from
-/// Request -> Response types that is called synchronously, the service request
-/// can be moved around and completed asynchronously.
-pub struct ServiceRequest<T>
-where
-    T: WrappedServiceTypeSupport,
-{
-    pub message: T::Request,
-    request_id: rmw_request_id_t,
-    response_sender: oneshot::Sender<(rmw_request_id_t, T::Response)>,
-}
-
-impl<T> ServiceRequest<T>
-where
-    T: WrappedServiceTypeSupport,
-{
-    /// Complete the service request, consuming the request in the process.
-    /// The reply is sent back on the next "ros spin".
-    pub fn respond(self, msg: T::Response) {
-        match self.response_sender.send((self.request_id, msg)) {
-            Err(_) => {
-                println!("service response receiver dropped");
-            }
-            _ => {}
-        }
-    }
-}
-
-unsafe impl<T> Send for ActionClient<T> where T: WrappedActionTypeSupport {}
-
-#[derive(Clone)]
-pub struct ActionClient<T>
-where
-    T: WrappedActionTypeSupport,
-{
-    client: Weak<Mutex<WrappedActionClient<T>>>,
-}
-
-#[derive(Clone)]
-pub struct ClientGoal<T>
-where
-    T: WrappedActionTypeSupport,
-{
-    client: Weak<Mutex<WrappedActionClient<T>>>,
-    pub uuid: uuid::Uuid,
-    feedback: Arc<Mutex<Option<mpsc::Receiver<T::Feedback>>>>,
-    result: Arc<Mutex<Option<oneshot::Receiver<T::Result>>>>,
-}
-
 #[derive(Clone)]
 pub struct ActionServer<T>
 where
@@ -348,32 +298,6 @@ impl Node {
         Ok(receiver)
     }
 
-    fn create_service_helper(
-        &mut self,
-        service_name: &str,
-        service_ts: *const rosidl_service_type_support_t,
-    ) -> Result<rcl_service_t> {
-        let mut service_handle = unsafe { rcl_get_zero_initialized_service() };
-        let service_name_c_string =
-            CString::new(service_name).map_err(|_| Error::RCL_RET_INVALID_ARGUMENT)?;
-
-        let result = unsafe {
-            let service_options = rcl_service_get_default_options();
-            rcl_service_init(
-                &mut service_handle,
-                self.node_handle.as_mut(),
-                service_ts,
-                service_name_c_string.as_ptr(),
-                &service_options,
-            )
-        };
-        if result == RCL_RET_OK as i32 {
-            Ok(service_handle)
-        } else {
-            Err(Error::from_rcl_error(result))
-        }
-    }
-
     pub fn create_service<T: 'static>(
         &mut self,
         service_name: &str,
@@ -381,7 +305,7 @@ impl Node {
     where
         T: WrappedServiceTypeSupport,
     {
-        let service_handle = self.create_service_helper(service_name, T::get_ts())?;
+        let service_handle = create_service_helper(self.node_handle.as_mut(), service_name, T::get_ts())?;
         let (sender, receiver) = mpsc::channel::<ServiceRequest<T>>(10);
 
         let ws = TypedService::<T> {
@@ -435,37 +359,11 @@ impl Node {
         service_available_untyped(self.node_handle.as_mut(), client)
     }
 
-    fn create_action_client_helper(
-        &mut self,
-        action_name: &str,
-        action_ts: *const rosidl_action_type_support_t,
-    ) -> Result<rcl_action_client_t> {
-        let mut client_handle = unsafe { rcl_action_get_zero_initialized_client() };
-        let action_name_c_string =
-            CString::new(action_name).map_err(|_| Error::RCL_RET_INVALID_ARGUMENT)?;
-
-        let result = unsafe {
-            let client_options = rcl_action_client_get_default_options();
-            rcl_action_client_init(
-                &mut client_handle,
-                self.node_handle.as_mut(),
-                action_ts,
-                action_name_c_string.as_ptr(),
-                &client_options,
-            )
-        };
-        if result == RCL_RET_OK as i32 {
-            Ok(client_handle)
-        } else {
-            Err(Error::from_rcl_error(result))
-        }
-    }
-
     pub fn create_action_client<T: 'static>(&mut self, action_name: &str) -> Result<ActionClient<T>>
     where
         T: WrappedActionTypeSupport,
     {
-        let client_handle = self.create_action_client_helper(action_name, T::get_ts())?;
+        let client_handle = create_action_client_helper(self.node_handle.as_mut(), action_name, T::get_ts())?;
         let client = WrappedActionClient::<T> {
             rcl_handle: client_handle,
             goal_response_channels: Vec::new(),
@@ -478,7 +376,7 @@ impl Node {
 
         let client_arc = Arc::new(Mutex::new(client));
         self.action_clients.push(client_arc.clone());
-        let c = ActionClient { client: Arc::downgrade(&client_arc) };
+        let c = make_action_client(Arc::downgrade(&client_arc));
         Ok(c)
     }
 
@@ -486,51 +384,7 @@ impl Node {
         &self,
         client: &ActionClient<T>,
     ) -> Result<bool> {
-        let client = client
-            .client
-            .upgrade()
-            .ok_or(Error::RCL_RET_CLIENT_INVALID)?;
-        let client = client.lock().unwrap();
-        let mut avail = false;
-        let result = unsafe {
-            rcl_action_server_is_available(self.node_handle.as_ref(), client.handle(), &mut avail)
-        };
-
-        if result == RCL_RET_OK as i32 {
-            Ok(avail)
-        } else {
-            eprintln!("coult not send request {}", result);
-            Err(Error::from_rcl_error(result))
-        }
-    }
-
-    fn create_action_server_helper(
-        &mut self,
-        action_name: &str,
-        clock_handle: *mut rcl_clock_t,
-        action_ts: *const rosidl_action_type_support_t,
-    ) -> Result<rcl_action_server_t> {
-        let mut server_handle = unsafe { rcl_action_get_zero_initialized_server() };
-        let action_name_c_string =
-            CString::new(action_name).map_err(|_| Error::RCL_RET_INVALID_ARGUMENT)?;
-
-        let result = unsafe {
-            let server_options = rcl_action_server_get_default_options();
-
-            rcl_action_server_init(
-                &mut server_handle,
-                self.node_handle.as_mut(),
-                clock_handle,
-                action_ts,
-                action_name_c_string.as_ptr(),
-                &server_options,
-            )
-        };
-        if result == RCL_RET_OK as i32 {
-            Ok(server_handle)
-        } else {
-            Err(Error::from_rcl_error(result))
-        }
+        action_server_available(self.node_handle.as_ref(), client)
     }
 
     pub fn create_action_server<T: 'static>(
@@ -558,7 +412,7 @@ impl Node {
         let mut clock_handle = Box::new(unsafe { clock_handle.assume_init() });
 
         let server_handle =
-            self.create_action_server_helper(action_name, clock_handle.as_mut(), T::get_ts())?;
+            create_action_server_helper(self.node_handle.as_mut(), action_name, clock_handle.as_mut(), T::get_ts())?;
         let server = WrappedActionServer::<T> {
             rcl_handle: server_handle,
             clock_handle,
@@ -1124,134 +978,6 @@ impl Drop for Node {
     }
 }
 
-impl<T: 'static> ClientGoal<T>
-where
-    T: WrappedActionTypeSupport,
-{
-    pub fn get_status(&self) -> Result<GoalStatus> {
-        let client = self
-            .client
-            .upgrade()
-            .ok_or(Error::RCL_RET_ACTION_CLIENT_INVALID)?;
-        let client = client.lock().unwrap();
-
-        Ok(client.get_goal_status(&self.uuid))
-    }
-
-    pub fn get_result(&mut self) -> Result<impl Future<Output = Result<T::Result>>> {
-        if let Some(result_channel) = self.result.lock().unwrap().take() {
-            // upgrade to actual ref. if still alive
-            let client = self
-                .client
-                .upgrade()
-                .ok_or(Error::RCL_RET_ACTION_CLIENT_INVALID)?;
-            let mut client = client.lock().unwrap();
-
-            client.send_result_request(self.uuid);
-
-            Ok(result_channel.map_err(|_| Error::RCL_RET_ACTION_CLIENT_INVALID))
-        } else {
-            // todo: error codes...
-            println!("already asked for the result!");
-            Err(Error::RCL_RET_ACTION_CLIENT_INVALID)
-        }
-    }
-
-    pub fn get_feedback(&self) -> Result<impl Stream<Item = T::Feedback> + Unpin> {
-        if let Some(feedback_channel) = self.feedback.lock().unwrap().take() {
-            Ok(feedback_channel)
-        } else {
-            // todo: error codes...
-            println!("someone else owns the feedback consumer stream");
-            Err(Error::RCL_RET_ACTION_CLIENT_INVALID)
-        }
-    }
-
-    pub fn cancel(&self) -> Result<impl Future<Output = Result<()>>> {
-        // upgrade to actual ref. if still alive
-        let client = self
-            .client
-            .upgrade()
-            .ok_or(Error::RCL_RET_ACTION_CLIENT_INVALID)?;
-        let mut client = client.lock().unwrap();
-
-        client.send_cancel_request(&self.uuid)
-    }
-}
-
-impl<T: 'static> ActionClient<T>
-where
-    T: WrappedActionTypeSupport,
-{
-    pub fn send_goal_request(
-        &self,
-        goal: T::Goal,
-    ) -> Result<impl Future<Output = Result<ClientGoal<T>>>>
-    where
-        T: WrappedActionTypeSupport,
-    {
-        // upgrade to actual ref. if still alive
-        let client = self
-            .client
-            .upgrade()
-            .ok_or(Error::RCL_RET_ACTION_CLIENT_INVALID)?;
-        let mut client = client.lock().unwrap();
-
-        let uuid = uuid::Uuid::new_v4();
-        let uuid_msg = unique_identifier_msgs::msg::UUID {
-            uuid: uuid.as_bytes().to_vec(),
-        };
-        let request_msg = T::make_goal_request_msg(uuid_msg, goal);
-        let native_msg = WrappedNativeMsg::<
-            <<T as WrappedActionTypeSupport>::SendGoal as WrappedServiceTypeSupport>::Request,
-        >::from(&request_msg);
-        let mut seq_no = 0i64;
-        let result = unsafe {
-            rcl_action_send_goal_request(&client.rcl_handle, native_msg.void_ptr(), &mut seq_no)
-        };
-
-        // set up channels
-        let (goal_req_sender, goal_req_receiver) = oneshot::channel::<
-            <<T as WrappedActionTypeSupport>::SendGoal as WrappedServiceTypeSupport>::Response,
-        >();
-        let (feedback_sender, feedback_receiver) = mpsc::channel::<T::Feedback>(1);
-        client.feedback_senders.push((uuid, feedback_sender));
-        let (result_sender, result_receiver) = oneshot::channel::<T::Result>();
-        client.result_senders.push((uuid, result_sender));
-
-        if result == RCL_RET_OK as i32 {
-            client
-                .goal_response_channels
-                .push((seq_no, goal_req_sender));
-            // instead of "canceled" we return invalid client.
-            let fut_client = Weak::clone(&self.client);
-            let future = goal_req_receiver
-                .map_err(|_| Error::RCL_RET_ACTION_CLIENT_INVALID)
-                .map(move |r| match r {
-                    Ok(resp) => {
-                        let (accepted, _stamp) = T::destructure_goal_response_msg(resp);
-                        if accepted {
-                            Ok(ClientGoal {
-                                client: fut_client,
-                                uuid,
-                                feedback: Arc::new(Mutex::new(Some(feedback_receiver))),
-                                result: Arc::new(Mutex::new(Some(result_receiver))),
-                            })
-                        } else {
-                            println!("goal rejected");
-                            Err(Error::RCL_RET_ACTION_GOAL_REJECTED)
-                        }
-                    }
-                    Err(e) => Err(e),
-                });
-            Ok(future)
-        } else {
-            eprintln!("coult not send goal request {}", result);
-            Err(Error::from_rcl_error(result))
-        }
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/src/services.rs b/src/services.rs
index bc63bb2..cc3bb59 100644
--- a/src/services.rs
+++ b/src/services.rs
@@ -1,5 +1,33 @@
 use super::*;
 
+/// Encapsulates a service request. In contrast to having a simply callback from
+/// Request -> Response types that is called synchronously, the service request
+/// can be moved around and completed asynchronously.
+pub struct ServiceRequest<T>
+where
+    T: WrappedServiceTypeSupport,
+{
+    pub message: T::Request,
+    request_id: rmw_request_id_t,
+    response_sender: oneshot::Sender<(rmw_request_id_t, T::Response)>,
+}
+
+impl<T> ServiceRequest<T>
+where
+    T: WrappedServiceTypeSupport,
+{
+    /// Complete the service request, consuming the request in the process.
+    /// The reply is sent back on the next "ros spin".
+    pub fn respond(self, msg: T::Response) {
+        match self.response_sender.send((self.request_id, msg)) {
+            Err(_) => {
+                println!("service response receiver dropped");
+            }
+            _ => {}
+        }
+    }
+}
+
 pub trait Service_ {
     fn handle(&self) -> &rcl_service_t;
     fn send_completed_responses(&mut self) -> ();
@@ -89,3 +117,29 @@ where
         }
     }
 }
+
+pub fn create_service_helper(
+    node: &mut rcl_node_t,
+    service_name: &str,
+    service_ts: *const rosidl_service_type_support_t,
+) -> Result<rcl_service_t> {
+    let mut service_handle = unsafe { rcl_get_zero_initialized_service() };
+    let service_name_c_string =
+        CString::new(service_name).map_err(|_| Error::RCL_RET_INVALID_ARGUMENT)?;
+
+    let result = unsafe {
+        let service_options = rcl_service_get_default_options();
+        rcl_service_init(
+            &mut service_handle,
+            node,
+            service_ts,
+            service_name_c_string.as_ptr(),
+            &service_options,
+        )
+    };
+    if result == RCL_RET_OK as i32 {
+        Ok(service_handle)
+    } else {
+        Err(Error::from_rcl_error(result))
+    }
+}