diff --git a/src/blob/copy.rs b/src/blob/copy.rs
index e9dcfdf..8ea6bed 100644
--- a/src/blob/copy.rs
+++ b/src/blob/copy.rs
@@ -2,7 +2,7 @@ use std::collections::HashMap;
 
 use serde::{Deserialize, Serialize};
 
-use crate::core::set::SetError;
+use crate::core::{set::SetError, RequestParams};
 
 #[derive(Debug, Clone, Serialize)]
 pub struct CopyBlobRequest {
@@ -27,10 +27,10 @@ pub struct CopyBlobResponse {
 }
 
 impl CopyBlobRequest {
-    pub fn new(from_account_id: String, account_id: String) -> Self {
+    pub fn new(params: RequestParams, from_account_id: String) -> Self {
         CopyBlobRequest {
             from_account_id,
-            account_id,
+            account_id: params.account_id,
             blob_ids: vec![],
         }
     }
diff --git a/src/blob/helpers.rs b/src/blob/helpers.rs
new file mode 100644
index 0000000..76a65bd
--- /dev/null
+++ b/src/blob/helpers.rs
@@ -0,0 +1,20 @@
+use crate::{
+    core::request::{Arguments, Request},
+    Method,
+};
+
+use super::copy::{CopyBlobRequest, CopyBlobResponse};
+
+impl Request<'_> {
+    pub fn copy_blob(&mut self, from_account_id: impl Into<String>) -> &mut CopyBlobRequest {
+        self.add_method_call(
+            Method::CopyBlob,
+            Arguments::blob_copy(self.params(Method::CopyBlob), from_account_id.into()),
+        )
+        .blob_copy_mut()
+    }
+
+    pub async fn send_copy_blob(self) -> crate::Result<CopyBlobResponse> {
+        self.send_single().await
+    }
+}
diff --git a/src/blob/mod.rs b/src/blob/mod.rs
index 4b30f2e..620b9ae 100644
--- a/src/blob/mod.rs
+++ b/src/blob/mod.rs
@@ -2,6 +2,7 @@ use crate::core::session::URLParser;
 
 pub mod copy;
 pub mod download;
+pub mod helpers;
 pub mod upload;
 
 pub enum URLParameter {
diff --git a/src/client.rs b/src/client.rs
index eb41c8f..8954ae7 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -188,7 +188,7 @@ impl Client {
 
 #[cfg(test)]
 mod tests {
-    use crate::email::{EmailBodyPart, Header, Property};
+    use crate::email::EmailBodyPart;
 
     #[test]
     fn test_serialize() {
diff --git a/src/core/changes.rs b/src/core/changes.rs
index 8f66259..ade0a27 100644
--- a/src/core/changes.rs
+++ b/src/core/changes.rs
@@ -1,5 +1,7 @@
 use serde::{Deserialize, Serialize};
 
+use super::RequestParams;
+
 #[derive(Debug, Clone, Serialize)]
 pub struct ChangesRequest {
     #[serde(rename = "accountId")]
@@ -38,9 +40,9 @@ pub struct ChangesResponse<A> {
 }
 
 impl ChangesRequest {
-    pub fn new(account_id: String, since_state: String) -> Self {
+    pub fn new(params: RequestParams, since_state: String) -> Self {
         ChangesRequest {
-            account_id,
+            account_id: params.account_id,
             since_state,
             max_changes: None,
         }
diff --git a/src/core/copy.rs b/src/core/copy.rs
index e26c706..6fab1c4 100644
--- a/src/core/copy.rs
+++ b/src/core/copy.rs
@@ -2,7 +2,10 @@ use std::{collections::HashMap, fmt::Display};
 
 use serde::{Deserialize, Serialize};
 
-use super::set::{Create, SetError};
+use super::{
+    set::{Create, SetError},
+    RequestParams,
+};
 
 #[derive(Debug, Clone, Serialize)]
 pub struct CopyRequest<T: Create> {
@@ -53,11 +56,11 @@ pub struct CopyResponse<T, U: Display> {
 }
 
 impl<T: Create> CopyRequest<T> {
-    pub fn new(from_account_id: String, account_id: String) -> Self {
+    pub fn new(params: RequestParams, from_account_id: String) -> Self {
         CopyRequest {
             from_account_id,
             if_from_in_state: None,
-            account_id,
+            account_id: params.account_id,
             if_in_state: None,
             create: HashMap::new(),
             on_success_destroy_original: false,
diff --git a/src/core/get.rs b/src/core/get.rs
index f476ee3..3108ee4 100644
--- a/src/core/get.rs
+++ b/src/core/get.rs
@@ -1,9 +1,16 @@
+use std::fmt::Display;
+
 use serde::{Deserialize, Serialize};
 
-use super::request::ResultReference;
+use crate::Method;
+
+use super::{request::ResultReference, RequestParams};
 
 #[derive(Debug, Clone, Serialize)]
-pub struct GetRequest<T, A: Default> {
+pub struct GetRequest<T: Display, A: Default> {
+    #[serde(skip)]
+    method: (Method, usize),
+
     #[serde(rename = "accountId")]
     account_id: String,
 
@@ -35,10 +42,11 @@ pub struct GetResponse<T> {
     not_found: Vec<String>,
 }
 
-impl<T, A: Default> GetRequest<T, A> {
-    pub fn new(account_id: String) -> Self {
+impl<T: Display, A: Default> GetRequest<T, A> {
+    pub fn new(params: RequestParams) -> Self {
         GetRequest {
-            account_id,
+            account_id: params.account_id,
+            method: (params.method, params.call_id),
             ids: None,
             ids_ref: None,
             properties: None,
@@ -75,6 +83,14 @@ impl<T, A: Default> GetRequest<T, A> {
     pub fn arguments(&mut self) -> &mut A {
         &mut self.arguments
     }
+
+    pub fn result_reference(&self, property: T) -> ResultReference {
+        ResultReference::new(
+            self.method.0,
+            self.method.1,
+            format!("/list/*/{}", property),
+        )
+    }
 }
 
 impl<T> GetResponse<T> {
@@ -97,6 +113,9 @@ impl<T> GetResponse<T> {
     pub fn unwrap_list(&mut self) -> Vec<T> {
         std::mem::take(&mut self.list)
     }
+    pub fn pop(&mut self) -> Option<T> {
+        self.list.pop()
+    }
 
     pub fn unwrap_not_found(&mut self) -> Vec<String> {
         std::mem::take(&mut self.not_found)
diff --git a/src/core/mod.rs b/src/core/mod.rs
index b77721f..02f3860 100644
--- a/src/core/mod.rs
+++ b/src/core/mod.rs
@@ -1,3 +1,5 @@
+use crate::Method;
+
 pub mod changes;
 pub mod copy;
 pub mod error;
@@ -8,3 +10,19 @@ pub mod request;
 pub mod response;
 pub mod session;
 pub mod set;
+
+pub struct RequestParams {
+    pub account_id: String,
+    pub method: Method,
+    pub call_id: usize,
+}
+
+impl RequestParams {
+    pub fn new(account_id: impl Into<String>, method: Method, call_id: usize) -> Self {
+        Self {
+            account_id: account_id.into(),
+            method,
+            call_id,
+        }
+    }
+}
diff --git a/src/core/query.rs b/src/core/query.rs
index 1ad4f90..40fdd76 100644
--- a/src/core/query.rs
+++ b/src/core/query.rs
@@ -1,7 +1,14 @@
 use serde::{Deserialize, Serialize};
 
+use crate::Method;
+
+use super::{request::ResultReference, RequestParams};
+
 #[derive(Debug, Clone, Serialize)]
 pub struct QueryRequest<F, S, A: Default> {
+    #[serde(skip)]
+    method: (Method, usize),
+
     #[serde(rename = "accountId")]
     account_id: String,
 
@@ -97,9 +104,10 @@ pub struct QueryResponse {
 }
 
 impl<F, S, A: Default> QueryRequest<F, S, A> {
-    pub fn new(account_id: String) -> Self {
+    pub fn new(params: RequestParams) -> Self {
         QueryRequest {
-            account_id,
+            account_id: params.account_id,
+            method: (params.method, params.call_id),
             filter: None,
             sort: None,
             position: None,
@@ -146,9 +154,18 @@ impl<F, S, A: Default> QueryRequest<F, S, A> {
         self
     }
 
+    pub fn calculate_total(&mut self, calculate_total: bool) -> &mut Self {
+        self.calculate_total = Some(calculate_total);
+        self
+    }
+
     pub fn arguments(&mut self) -> &mut A {
         &mut self.arguments
     }
+
+    pub fn result_reference(&self) -> ResultReference {
+        ResultReference::new(self.method.0, self.method.1, "/ids")
+    }
 }
 
 impl QueryResponse {
@@ -160,6 +177,14 @@ impl QueryResponse {
         &self.ids
     }
 
+    pub fn id(&self, pos: usize) -> &str {
+        self.ids[pos].as_str()
+    }
+
+    pub fn unwrap_ids(self) -> Vec<String> {
+        self.ids
+    }
+
     pub fn total(&self) -> Option<usize> {
         self.total
     }
@@ -190,8 +215,13 @@ impl<A> Comparator<A> {
         }
     }
 
-    pub fn is_ascending(mut self, is_ascending: bool) -> Self {
-        self.is_ascending = is_ascending;
+    pub fn descending(mut self) -> Self {
+        self.is_ascending = false;
+        self
+    }
+
+    pub fn ascending(mut self) -> Self {
+        self.is_ascending = true;
         self
     }
 
diff --git a/src/core/query_changes.rs b/src/core/query_changes.rs
index edba477..a37213e 100644
--- a/src/core/query_changes.rs
+++ b/src/core/query_changes.rs
@@ -1,6 +1,9 @@
 use serde::{Deserialize, Serialize};
 
-use super::query::{Comparator, Filter};
+use super::{
+    query::{Comparator, Filter},
+    RequestParams,
+};
 
 #[derive(Debug, Clone, Serialize)]
 pub struct QueryChangesRequest<F, S, A: Default> {
@@ -56,9 +59,9 @@ pub struct AddedItem {
 }
 
 impl<F, S, A: Default> QueryChangesRequest<F, S, A> {
-    pub fn new(account_id: String, since_query_state: String) -> Self {
+    pub fn new(params: RequestParams, since_query_state: String) -> Self {
         QueryChangesRequest {
-            account_id,
+            account_id: params.account_id,
             filter: None,
             sort: None,
             since_query_state,
diff --git a/src/core/request.rs b/src/core/request.rs
index f7666fd..4f51f7a 100644
--- a/src/core/request.rs
+++ b/src/core/request.rs
@@ -23,6 +23,7 @@ use super::{
     query_changes::QueryChangesRequest,
     response::{MethodResponse, Response, SingleMethodResponse},
     set::SetRequest,
+    RequestParams,
 };
 
 #[derive(Serialize)]
@@ -98,103 +99,103 @@ pub enum Arguments {
 }
 
 impl Arguments {
-    pub fn changes(account_id: String, since_state: String) -> Self {
-        Arguments::Changes(ChangesRequest::new(account_id, since_state))
+    pub fn changes(params: RequestParams, since_state: String) -> Self {
+        Arguments::Changes(ChangesRequest::new(params, since_state))
     }
 
-    pub fn push_get(account_id: String) -> Self {
-        Arguments::PushGet(GetRequest::new(account_id))
+    pub fn push_get(params: RequestParams) -> Self {
+        Arguments::PushGet(GetRequest::new(params))
     }
 
-    pub fn push_set(account_id: String) -> Self {
-        Arguments::PushSet(SetRequest::new(account_id))
+    pub fn push_set(params: RequestParams) -> Self {
+        Arguments::PushSet(SetRequest::new(params))
     }
 
-    pub fn blob_copy(from_account_id: String, account_id: String) -> Self {
-        Arguments::BlobCopy(CopyBlobRequest::new(from_account_id, account_id))
+    pub fn blob_copy(params: RequestParams, from_account_id: String) -> Self {
+        Arguments::BlobCopy(CopyBlobRequest::new(params, from_account_id))
     }
 
-    pub fn mailbox_get(account_id: String) -> Self {
-        Arguments::MailboxGet(GetRequest::new(account_id))
+    pub fn mailbox_get(params: RequestParams) -> Self {
+        Arguments::MailboxGet(GetRequest::new(params))
     }
 
-    pub fn mailbox_query(account_id: String) -> Self {
-        Arguments::MailboxQuery(QueryRequest::new(account_id))
+    pub fn mailbox_query(params: RequestParams) -> Self {
+        Arguments::MailboxQuery(QueryRequest::new(params))
     }
 
-    pub fn mailbox_query_changes(account_id: String, since_query_state: String) -> Self {
-        Arguments::MailboxQueryChanges(QueryChangesRequest::new(account_id, since_query_state))
+    pub fn mailbox_query_changes(params: RequestParams, since_query_state: String) -> Self {
+        Arguments::MailboxQueryChanges(QueryChangesRequest::new(params, since_query_state))
     }
 
-    pub fn mailbox_set(account_id: String) -> Self {
-        Arguments::MailboxSet(SetRequest::new(account_id))
+    pub fn mailbox_set(params: RequestParams) -> Self {
+        Arguments::MailboxSet(SetRequest::new(params))
     }
 
-    pub fn thread_get(account_id: String) -> Self {
-        Arguments::ThreadGet(GetRequest::new(account_id))
+    pub fn thread_get(params: RequestParams) -> Self {
+        Arguments::ThreadGet(GetRequest::new(params))
     }
 
-    pub fn email_get(account_id: String) -> Self {
-        Arguments::EmailGet(GetRequest::new(account_id))
+    pub fn email_get(params: RequestParams) -> Self {
+        Arguments::EmailGet(GetRequest::new(params))
     }
 
-    pub fn email_query(account_id: String) -> Self {
-        Arguments::EmailQuery(QueryRequest::new(account_id))
+    pub fn email_query(params: RequestParams) -> Self {
+        Arguments::EmailQuery(QueryRequest::new(params))
     }
 
-    pub fn email_query_changes(account_id: String, since_query_state: String) -> Self {
-        Arguments::EmailQueryChanges(QueryChangesRequest::new(account_id, since_query_state))
+    pub fn email_query_changes(params: RequestParams, since_query_state: String) -> Self {
+        Arguments::EmailQueryChanges(QueryChangesRequest::new(params, since_query_state))
     }
 
-    pub fn email_set(account_id: String) -> Self {
-        Arguments::EmailSet(SetRequest::new(account_id))
+    pub fn email_set(params: RequestParams) -> Self {
+        Arguments::EmailSet(SetRequest::new(params))
     }
 
-    pub fn email_copy(from_account_id: String, account_id: String) -> Self {
-        Arguments::EmailCopy(CopyRequest::new(from_account_id, account_id))
+    pub fn email_copy(params: RequestParams, from_account_id: String) -> Self {
+        Arguments::EmailCopy(CopyRequest::new(params, from_account_id))
     }
 
-    pub fn email_import(account_id: String) -> Self {
-        Arguments::EmailImport(EmailImportRequest::new(account_id))
+    pub fn email_import(params: RequestParams) -> Self {
+        Arguments::EmailImport(EmailImportRequest::new(params))
     }
 
-    pub fn email_parse(account_id: String) -> Self {
-        Arguments::EmailParse(EmailParseRequest::new(account_id))
+    pub fn email_parse(params: RequestParams) -> Self {
+        Arguments::EmailParse(EmailParseRequest::new(params))
     }
 
-    pub fn identity_get(account_id: String) -> Self {
-        Arguments::IdentityGet(GetRequest::new(account_id))
+    pub fn identity_get(params: RequestParams) -> Self {
+        Arguments::IdentityGet(GetRequest::new(params))
     }
 
-    pub fn identity_set(account_id: String) -> Self {
-        Arguments::IdentitySet(SetRequest::new(account_id))
+    pub fn identity_set(params: RequestParams) -> Self {
+        Arguments::IdentitySet(SetRequest::new(params))
     }
 
-    pub fn email_submission_get(account_id: String) -> Self {
-        Arguments::EmailSubmissionGet(GetRequest::new(account_id))
+    pub fn email_submission_get(params: RequestParams) -> Self {
+        Arguments::EmailSubmissionGet(GetRequest::new(params))
     }
 
-    pub fn email_submission_query(account_id: String) -> Self {
-        Arguments::EmailSubmissionQuery(QueryRequest::new(account_id))
+    pub fn email_submission_query(params: RequestParams) -> Self {
+        Arguments::EmailSubmissionQuery(QueryRequest::new(params))
     }
 
-    pub fn email_submission_query_changes(account_id: String, since_query_state: String) -> Self {
-        Arguments::EmailSubmissionQueryChanges(QueryChangesRequest::new(
-            account_id,
-            since_query_state,
-        ))
+    pub fn email_submission_query_changes(
+        params: RequestParams,
+        since_query_state: String,
+    ) -> Self {
+        Arguments::EmailSubmissionQueryChanges(QueryChangesRequest::new(params, since_query_state))
     }
 
-    pub fn email_submission_set(account_id: String) -> Self {
-        Arguments::EmailSubmissionSet(SetRequest::new(account_id))
+    pub fn email_submission_set(params: RequestParams) -> Self {
+        Arguments::EmailSubmissionSet(SetRequest::new(params))
     }
 
-    pub fn vacation_response_get(account_id: String) -> Self {
-        Arguments::VacationResponseGet(GetRequest::new(account_id))
+    pub fn vacation_response_get(params: RequestParams) -> Self {
+        Arguments::VacationResponseGet(GetRequest::new(params))
     }
 
-    pub fn vacation_response_set(account_id: String) -> Self {
-        Arguments::VacationResponseSet(SetRequest::new(account_id))
+    pub fn vacation_response_set(params: RequestParams) -> Self {
+        Arguments::VacationResponseSet(SetRequest::new(params))
     }
 
     pub fn changes_mut(&mut self) -> &mut ChangesRequest {
@@ -431,308 +432,41 @@ impl<'x> Request<'x> {
         }
     }
 
-    fn add_method_call(&mut self, method: Method, arguments: Arguments) -> &mut Arguments {
+    pub fn params(&self, method: Method) -> RequestParams {
+        RequestParams {
+            account_id: self.default_account_id.clone(),
+            method,
+            call_id: self.method_calls.len(),
+        }
+    }
+
+    pub fn add_method_call(&mut self, method: Method, arguments: Arguments) -> &mut Arguments {
         let call_id = format!("s{}", self.method_calls.len());
         self.method_calls.push((method, arguments, call_id));
         &mut self.method_calls.last_mut().unwrap().1
     }
 
-    pub fn get_push(&mut self) -> &mut GetRequest<push_subscription::Property, ()> {
-        self.add_method_call(
-            Method::GetPushSubscription,
-            Arguments::push_get(self.default_account_id.clone()),
-        )
-        .push_get_mut()
-    }
-
-    pub fn set_push(&mut self) -> &mut SetRequest<PushSubscription<Set>, ()> {
-        self.add_method_call(
-            Method::SetPushSubscription,
-            Arguments::push_set(self.default_account_id.clone()),
-        )
-        .push_set_mut()
-    }
-
-    pub fn copy_blob(
-        &mut self,
-        from_account_id: impl Into<String>,
-        account_id: impl Into<String>,
-    ) -> &mut CopyBlobRequest {
-        self.add_method_call(
-            Method::CopyBlob,
-            Arguments::blob_copy(from_account_id.into(), account_id.into()),
-        )
-        .blob_copy_mut()
-    }
-
-    pub fn get_mailbox(&mut self) -> &mut GetRequest<mailbox::Property, ()> {
-        self.add_method_call(
-            Method::GetMailbox,
-            Arguments::mailbox_get(self.default_account_id.clone()),
-        )
-        .mailbox_get_mut()
-    }
-
-    pub fn changes_mailbox(&mut self, since_state: impl Into<String>) -> &mut ChangesRequest {
-        self.add_method_call(
-            Method::ChangesMailbox,
-            Arguments::changes(self.default_account_id.clone(), since_state.into()),
-        )
-        .changes_mut()
-    }
-
-    pub fn query_mailbox(
-        &mut self,
-    ) -> &mut QueryRequest<
-        mailbox::query::Filter,
-        mailbox::query::Comparator,
-        mailbox::QueryArguments,
-    > {
-        self.add_method_call(
-            Method::QueryMailbox,
-            Arguments::mailbox_query(self.default_account_id.clone()),
-        )
-        .mailbox_query_mut()
-    }
-
-    pub fn query_mailbox_changes(
-        &mut self,
-        since_query_state: impl Into<String>,
-    ) -> &mut QueryChangesRequest<
-        mailbox::query::Filter,
-        mailbox::query::Comparator,
-        mailbox::QueryArguments,
-    > {
-        self.add_method_call(
-            Method::QueryChangesMailbox,
-            Arguments::mailbox_query_changes(
-                self.default_account_id.clone(),
-                since_query_state.into(),
-            ),
-        )
-        .mailbox_query_changes_mut()
-    }
-
-    pub fn set_mailbox(&mut self) -> &mut SetRequest<Mailbox<Set>, mailbox::SetArguments> {
-        self.add_method_call(
-            Method::SetMailbox,
-            Arguments::mailbox_set(self.default_account_id.clone()),
-        )
-        .mailbox_set_mut()
-    }
-
-    pub fn get_thread(&mut self) -> &mut GetRequest<thread::Property, ()> {
-        self.add_method_call(
-            Method::GetThread,
-            Arguments::thread_get(self.default_account_id.clone()),
-        )
-        .thread_get_mut()
-    }
-
-    pub fn changes_thread(&mut self, since_state: impl Into<String>) -> &mut ChangesRequest {
-        self.add_method_call(
-            Method::ChangesThread,
-            Arguments::changes(self.default_account_id.clone(), since_state.into()),
-        )
-        .changes_mut()
-    }
-    pub fn get_email(&mut self) -> &mut GetRequest<email::Property, email::GetArguments> {
-        self.add_method_call(
-            Method::GetEmail,
-            Arguments::email_get(self.default_account_id.clone()),
-        )
-        .email_get_mut()
-    }
-
-    pub fn changes_email(&mut self, since_state: impl Into<String>) -> &mut ChangesRequest {
-        self.add_method_call(
-            Method::ChangesEmail,
-            Arguments::changes(self.default_account_id.clone(), since_state.into()),
-        )
-        .changes_mut()
-    }
-
-    pub fn query_email(
-        &mut self,
-    ) -> &mut QueryRequest<email::query::Filter, email::query::Comparator, email::QueryArguments>
-    {
-        self.add_method_call(
-            Method::QueryEmail,
-            Arguments::email_query(self.default_account_id.clone()),
-        )
-        .email_query_mut()
-    }
-
-    pub fn query_email_changes(
-        &mut self,
-        since_query_state: impl Into<String>,
-    ) -> &mut QueryChangesRequest<
-        email::query::Filter,
-        email::query::Comparator,
-        email::QueryArguments,
-    > {
-        self.add_method_call(
-            Method::QueryChangesEmail,
-            Arguments::email_query_changes(
-                self.default_account_id.clone(),
-                since_query_state.into(),
-            ),
-        )
-        .email_query_changes_mut()
-    }
-
-    pub fn set_email(&mut self) -> &mut SetRequest<Email<Set>, ()> {
-        self.add_method_call(
-            Method::SetEmail,
-            Arguments::email_set(self.default_account_id.clone()),
-        )
-        .email_set_mut()
-    }
-
-    pub fn copy_email(
-        &mut self,
-        from_account_id: impl Into<String>,
-        account_id: impl Into<String>,
-    ) -> &mut CopyRequest<Email<Set>> {
-        self.add_method_call(
-            Method::CopyEmail,
-            Arguments::email_copy(from_account_id.into(), account_id.into()),
-        )
-        .email_copy_mut()
-    }
-
-    pub fn import_email(&mut self) -> &mut EmailImportRequest {
-        self.add_method_call(
-            Method::ImportEmail,
-            Arguments::email_import(self.default_account_id.clone()),
-        )
-        .email_import_mut()
-    }
-
-    pub fn parse_email(&mut self) -> &mut EmailParseRequest {
-        self.add_method_call(
-            Method::ParseEmail,
-            Arguments::email_parse(self.default_account_id.clone()),
-        )
-        .email_parse_mut()
-    }
-
-    pub fn get_identity(&mut self) -> &mut GetRequest<identity::Property, ()> {
-        self.add_method_call(
-            Method::GetIdentity,
-            Arguments::identity_get(self.default_account_id.clone()),
-        )
-        .identity_get_mut()
-    }
-
-    pub fn set_identity(&mut self) -> &mut SetRequest<Identity<Set>, ()> {
-        self.add_method_call(
-            Method::SetIdentity,
-            Arguments::identity_set(self.default_account_id.clone()),
-        )
-        .identity_set_mut()
-    }
-
-    pub fn get_email_submission(&mut self) -> &mut GetRequest<email_submission::Property, ()> {
-        if !self.using.contains(&URI::Submission) {
-            self.using.push(URI::Submission);
+    pub fn add_capability(&mut self, uri: URI) {
+        if !self.using.contains(&uri) {
+            self.using.push(uri);
         }
-        self.add_method_call(
-            Method::GetEmailSubmission,
-            Arguments::email_submission_get(self.default_account_id.clone()),
-        )
-        .email_submission_get_mut()
     }
 
-    pub fn changes_email_submission(
-        &mut self,
-        since_state: impl Into<String>,
-    ) -> &mut ChangesRequest {
-        if !self.using.contains(&URI::Submission) {
-            self.using.push(URI::Submission);
-        }
-        self.add_method_call(
-            Method::ChangesEmailSubmission,
-            Arguments::changes(self.default_account_id.clone(), since_state.into()),
-        )
-        .changes_mut()
-    }
-
-    pub fn query_email_submission(
-        &mut self,
-    ) -> &mut QueryRequest<email_submission::query::Filter, email_submission::query::Comparator, ()>
-    {
-        if !self.using.contains(&URI::Submission) {
-            self.using.push(URI::Submission);
-        }
-        self.add_method_call(
-            Method::QueryEmailSubmission,
-            Arguments::email_submission_query(self.default_account_id.clone()),
-        )
-        .email_submission_query_mut()
-    }
-
-    pub fn query_email_submission_changes(
-        &mut self,
-        since_query_state: impl Into<String>,
-    ) -> &mut QueryChangesRequest<
-        email_submission::query::Filter,
-        email_submission::query::Comparator,
-        (),
-    > {
-        if !self.using.contains(&URI::Submission) {
-            self.using.push(URI::Submission);
-        }
-        self.add_method_call(
-            Method::QueryChangesEmailSubmission,
-            Arguments::email_submission_query_changes(
-                self.default_account_id.clone(),
-                since_query_state.into(),
-            ),
-        )
-        .email_submission_query_changes_mut()
-    }
-
-    pub fn set_email_submission(
-        &mut self,
-    ) -> &mut SetRequest<EmailSubmission<Set>, email_submission::SetArguments> {
-        if !self.using.contains(&URI::Submission) {
-            self.using.push(URI::Submission);
-        }
-        self.add_method_call(
-            Method::SetEmailSubmission,
-            Arguments::email_submission_set(self.default_account_id.clone()),
-        )
-        .email_submission_set_mut()
-    }
-
-    pub fn get_vacation_response(&mut self) -> &mut GetRequest<vacation_response::Property, ()> {
-        if !self.using.contains(&URI::VacationResponse) {
-            self.using.push(URI::VacationResponse);
-        }
-        self.add_method_call(
-            Method::GetVacationResponse,
-            Arguments::vacation_response_get(self.default_account_id.clone()),
-        )
-        .vacation_response_get_mut()
-    }
-
-    pub fn set_vacation_response(&mut self) -> &mut SetRequest<VacationResponse<Set>, ()> {
-        if !self.using.contains(&URI::VacationResponse) {
-            self.using.push(URI::VacationResponse);
-        }
-        self.add_method_call(
-            Method::SetVacationResponse,
-            Arguments::vacation_response_set(self.default_account_id.clone()),
-        )
-        .vacation_response_set_mut()
-    }
-
-    pub fn result_reference(&self, path: impl Into<String>) -> ResultReference {
+    pub fn last_result_reference(&self, path: impl Into<String>) -> ResultReference {
         let last_method = self.method_calls.last().unwrap();
         ResultReference {
             result_of: last_method.2.clone(),
-            name: last_method.0.clone(),
+            name: last_method.0,
+            path: path.into(),
+        }
+    }
+}
+
+impl ResultReference {
+    pub fn new(method: Method, call_id: usize, path: impl Into<String>) -> Self {
+        ResultReference {
+            result_of: format!("s{}", call_id),
+            name: method,
             path: path.into(),
         }
     }
diff --git a/src/core/set.rs b/src/core/set.rs
index 599764f..b97b843 100644
--- a/src/core/set.rs
+++ b/src/core/set.rs
@@ -7,7 +7,7 @@ use std::{
 
 use crate::Error;
 
-use super::request::ResultReference;
+use super::{request::ResultReference, RequestParams};
 
 #[derive(Debug, Clone, Serialize)]
 pub struct SetRequest<T: Create, A: Default> {
@@ -72,7 +72,7 @@ where
     U: Display,
 {
     #[serde(rename = "type")]
-    type_: SetErrorType,
+    pub type_: SetErrorType,
     description: Option<String>,
     properties: Option<Vec<U>>,
 }
@@ -131,9 +131,9 @@ pub trait Create: Sized {
 }
 
 impl<T: Create, A: Default> SetRequest<T, A> {
-    pub fn new(account_id: String) -> Self {
+    pub fn new(params: RequestParams) -> Self {
         Self {
-            account_id,
+            account_id: params.account_id,
             if_in_state: None,
             create: None,
             update: None,
@@ -166,6 +166,15 @@ impl<T: Create, A: Default> SetRequest<T, A> {
             .unwrap()
     }
 
+    pub fn create_item(&mut self, item: T) -> String {
+        let create_id = self.create.as_ref().map_or(0, |c| c.len());
+        let create_id_str = format!("c{}", create_id);
+        self.create
+            .get_or_insert_with(HashMap::new)
+            .insert(create_id_str.clone(), item);
+        create_id_str
+    }
+
     pub fn update(&mut self, id: impl Into<String>) -> &mut T {
         let id: String = id.into();
         self.update
@@ -174,6 +183,12 @@ impl<T: Create, A: Default> SetRequest<T, A> {
         self.update.as_mut().unwrap().get_mut(&id).unwrap()
     }
 
+    pub fn update_item(&mut self, id: impl Into<String>, item: T) {
+        self.update
+            .get_or_insert_with(HashMap::new)
+            .insert(id.into(), item);
+    }
+
     pub fn destroy<U, V>(&mut self, ids: U) -> &mut Self
     where
         U: IntoIterator<Item = V>,
diff --git a/src/email/get.rs b/src/email/get.rs
index b13c21a..490a22a 100644
--- a/src/email/get.rs
+++ b/src/email/get.rs
@@ -10,10 +10,18 @@ impl Email<Get> {
         self.id.as_ref().unwrap()
     }
 
+    pub fn unwrap_id(self) -> String {
+        self.id.unwrap()
+    }
+
     pub fn blob_id(&self) -> &str {
         self.blob_id.as_ref().unwrap()
     }
 
+    pub fn unwrap_blob_id(self) -> String {
+        self.blob_id.unwrap()
+    }
+
     pub fn thread_id(&self) -> &str {
         self.thread_id.as_ref().unwrap()
     }
@@ -184,11 +192,11 @@ impl EmailBodyValue<Get> {
     }
 
     pub fn is_encoding_problem(&self) -> bool {
-        self.is_encoding_problem
+        self.is_encoding_problem.unwrap_or(false)
     }
 
     pub fn is_truncated(&self) -> bool {
-        self.is_truncated
+        self.is_truncated.unwrap_or(false)
     }
 }
 
diff --git a/src/email/helpers.rs b/src/email/helpers.rs
index e5a478a..0ef4081 100644
--- a/src/email/helpers.rs
+++ b/src/email/helpers.rs
@@ -1,26 +1,37 @@
 use crate::{
     client::Client,
     core::{
-        query::{Comparator, Filter, QueryResponse},
-        response::{EmailGetResponse, EmailSetResponse},
+        changes::{ChangesRequest, ChangesResponse},
+        copy::CopyRequest,
+        get::GetRequest,
+        query::{Comparator, Filter, QueryRequest, QueryResponse},
+        query_changes::{QueryChangesRequest, QueryChangesResponse},
+        request::{Arguments, Request},
+        response::{EmailCopyResponse, EmailGetResponse, EmailSetResponse},
+        set::SetRequest,
     },
+    Method, Set,
 };
 
 use super::{
-    import::EmailImportResponse, parse::EmailParseResponse, BodyProperty, Email, Property,
+    import::{EmailImportRequest, EmailImportResponse},
+    parse::{EmailParseRequest, EmailParseResponse},
+    BodyProperty, Email, Property,
 };
 
 impl Client {
-    pub async fn email_import<T, U>(
+    pub async fn email_import<T, U, V, W>(
         &mut self,
         raw_message: Vec<u8>,
         mailbox_ids: T,
-        keywords: Option<T>,
+        keywords: Option<V>,
         received_at: Option<i64>,
     ) -> crate::Result<Email>
     where
         T: IntoIterator<Item = U>,
         U: Into<String>,
+        V: IntoIterator<Item = W>,
+        W: Into<String>,
     {
         let blob_id = self.upload(raw_message, None).await?.unwrap_blob_id();
         let mut request = self.build();
@@ -119,6 +130,16 @@ impl Client {
             .map(|mut r| r.unwrap_list().pop())
     }
 
+    pub async fn email_changes(
+        &mut self,
+        since_state: impl Into<String>,
+        max_changes: usize,
+    ) -> crate::Result<ChangesResponse<()>> {
+        let mut request = self.build();
+        request.changes_email(since_state).max_changes(max_changes);
+        request.send_single().await
+    }
+
     pub async fn email_query(
         &mut self,
         filter: Option<impl Into<Filter<super::query::Filter>>>,
@@ -164,3 +185,117 @@ impl Client {
             .and_then(|mut r| r.parsed(blob_id))
     }
 }
+
+impl Request<'_> {
+    pub fn get_email(&mut self) -> &mut GetRequest<super::Property, super::GetArguments> {
+        self.add_method_call(
+            Method::GetEmail,
+            Arguments::email_get(self.params(Method::GetEmail)),
+        )
+        .email_get_mut()
+    }
+
+    pub async fn send_get_email(self) -> crate::Result<EmailGetResponse> {
+        self.send_single().await
+    }
+
+    pub fn changes_email(&mut self, since_state: impl Into<String>) -> &mut ChangesRequest {
+        self.add_method_call(
+            Method::ChangesEmail,
+            Arguments::changes(self.params(Method::ChangesEmail), since_state.into()),
+        )
+        .changes_mut()
+    }
+
+    pub async fn send_changes_email(self) -> crate::Result<ChangesResponse<()>> {
+        self.send_single().await
+    }
+
+    pub fn query_email(
+        &mut self,
+    ) -> &mut QueryRequest<super::query::Filter, super::query::Comparator, super::QueryArguments>
+    {
+        self.add_method_call(
+            Method::QueryEmail,
+            Arguments::email_query(self.params(Method::QueryEmail)),
+        )
+        .email_query_mut()
+    }
+
+    pub async fn send_query_email(self) -> crate::Result<QueryResponse> {
+        self.send_single().await
+    }
+
+    pub fn query_email_changes(
+        &mut self,
+        since_query_state: impl Into<String>,
+    ) -> &mut QueryChangesRequest<
+        super::query::Filter,
+        super::query::Comparator,
+        super::QueryArguments,
+    > {
+        self.add_method_call(
+            Method::QueryChangesEmail,
+            Arguments::email_query_changes(
+                self.params(Method::QueryChangesEmail),
+                since_query_state.into(),
+            ),
+        )
+        .email_query_changes_mut()
+    }
+
+    pub async fn send_query_email_changes(self) -> crate::Result<QueryChangesResponse> {
+        self.send_single().await
+    }
+
+    pub fn set_email(&mut self) -> &mut SetRequest<Email<Set>, ()> {
+        self.add_method_call(
+            Method::SetEmail,
+            Arguments::email_set(self.params(Method::SetEmail)),
+        )
+        .email_set_mut()
+    }
+
+    pub async fn send_set_email(self) -> crate::Result<EmailSetResponse> {
+        self.send_single().await
+    }
+
+    pub fn copy_email(
+        &mut self,
+        from_account_id: impl Into<String>,
+    ) -> &mut CopyRequest<Email<Set>> {
+        self.add_method_call(
+            Method::CopyEmail,
+            Arguments::email_copy(self.params(Method::CopyEmail), from_account_id.into()),
+        )
+        .email_copy_mut()
+    }
+
+    pub async fn send_copy_email(self) -> crate::Result<EmailCopyResponse> {
+        self.send_single().await
+    }
+
+    pub fn import_email(&mut self) -> &mut EmailImportRequest {
+        self.add_method_call(
+            Method::ImportEmail,
+            Arguments::email_import(self.params(Method::ImportEmail)),
+        )
+        .email_import_mut()
+    }
+
+    pub async fn send_import_email(self) -> crate::Result<EmailImportResponse> {
+        self.send_single().await
+    }
+
+    pub fn parse_email(&mut self) -> &mut EmailParseRequest {
+        self.add_method_call(
+            Method::ParseEmail,
+            Arguments::email_parse(self.params(Method::ParseEmail)),
+        )
+        .email_parse_mut()
+    }
+
+    pub async fn send_parse_email(self) -> crate::Result<EmailParseResponse> {
+        self.send_single().await
+    }
+}
diff --git a/src/email/import.rs b/src/email/import.rs
index fae935b..c89de3f 100644
--- a/src/email/import.rs
+++ b/src/email/import.rs
@@ -7,6 +7,7 @@ use crate::{
     core::{
         request::ResultReference,
         set::{from_timestamp, SetError},
+        RequestParams,
     },
     Error,
 };
@@ -69,9 +70,9 @@ pub struct EmailImportResponse {
 }
 
 impl EmailImportRequest {
-    pub fn new(account_id: String) -> Self {
+    pub fn new(params: RequestParams) -> Self {
         EmailImportRequest {
-            account_id,
+            account_id: params.account_id,
             if_in_state: None,
             emails: HashMap::new(),
         }
diff --git a/src/email/mod.rs b/src/email/mod.rs
index a447741..70eeb7f 100644
--- a/src/email/mod.rs
+++ b/src/email/mod.rs
@@ -225,10 +225,12 @@ pub struct EmailBodyValue<State = Get> {
     value: String,
 
     #[serde(rename = "isEncodingProblem")]
-    is_encoding_problem: bool,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    is_encoding_problem: Option<bool>,
 
     #[serde(rename = "isTruncated")]
-    is_truncated: bool,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    is_truncated: Option<bool>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
diff --git a/src/email/parse.rs b/src/email/parse.rs
index 94d34ed..fae436b 100644
--- a/src/email/parse.rs
+++ b/src/email/parse.rs
@@ -2,7 +2,7 @@ use std::collections::HashMap;
 
 use serde::{Deserialize, Serialize};
 
-use crate::Error;
+use crate::{core::RequestParams, Error};
 
 use super::{BodyProperty, Email, Property};
 
@@ -55,9 +55,9 @@ pub struct EmailParseResponse {
 }
 
 impl EmailParseRequest {
-    pub fn new(account_id: String) -> Self {
+    pub fn new(params: RequestParams) -> Self {
         EmailParseRequest {
-            account_id,
+            account_id: params.account_id,
             blob_ids: Vec::new(),
             properties: None,
             body_properties: None,
diff --git a/src/email/query.rs b/src/email/query.rs
index 8fdb417..d67f1c6 100644
--- a/src/email/query.rs
+++ b/src/email/query.rs
@@ -224,14 +224,13 @@ impl Filter {
         }
     }
 
-    pub fn header<U, V>(value: U) -> Self
-    where
-        U: IntoIterator<Item = V>,
-        V: Into<String>,
-    {
-        Filter::Header {
-            value: value.into_iter().map(|v| v.into()).collect(),
+    pub fn header(header: impl Into<String>, v: Option<impl Into<String>>) -> Self {
+        let mut value = Vec::with_capacity(2);
+        value.push(header.into());
+        if let Some(v) = v {
+            value.push(v.into());
         }
+        Filter::Header { value }
     }
 }
 
diff --git a/src/email/set.rs b/src/email/set.rs
index f3509c8..32f44b0 100644
--- a/src/email/set.rs
+++ b/src/email/set.rs
@@ -289,8 +289,8 @@ impl From<String> for EmailBodyValue {
     fn from(value: String) -> Self {
         EmailBodyValue {
             value,
-            is_encoding_problem: false,
-            is_truncated: false,
+            is_encoding_problem: None,
+            is_truncated: None,
             _state: Default::default(),
         }
     }
@@ -300,8 +300,8 @@ impl From<&str> for EmailBodyValue {
     fn from(value: &str) -> Self {
         EmailBodyValue {
             value: value.to_string(),
-            is_encoding_problem: false,
-            is_truncated: false,
+            is_encoding_problem: None,
+            is_truncated: None,
             _state: Default::default(),
         }
     }
diff --git a/src/email_submission/helpers.rs b/src/email_submission/helpers.rs
new file mode 100644
index 0000000..056c5fa
--- /dev/null
+++ b/src/email_submission/helpers.rs
@@ -0,0 +1,97 @@
+use crate::{
+    core::{
+        changes::{ChangesRequest, ChangesResponse},
+        get::GetRequest,
+        query::{QueryRequest, QueryResponse},
+        query_changes::{QueryChangesRequest, QueryChangesResponse},
+        request::{Arguments, Request},
+        response::{EmailSubmissionGetResponse, EmailSubmissionSetResponse},
+        set::SetRequest,
+    },
+    Method, Set, URI,
+};
+
+use super::EmailSubmission;
+
+impl Request<'_> {
+    pub fn get_email_submission(&mut self) -> &mut GetRequest<super::Property, ()> {
+        self.add_capability(URI::Submission);
+        self.add_method_call(
+            Method::GetEmailSubmission,
+            Arguments::email_submission_get(self.params(Method::GetEmailSubmission)),
+        )
+        .email_submission_get_mut()
+    }
+
+    pub async fn send_get_email_submission(self) -> crate::Result<EmailSubmissionGetResponse> {
+        self.send_single().await
+    }
+
+    pub fn changes_email_submission(
+        &mut self,
+        since_state: impl Into<String>,
+    ) -> &mut ChangesRequest {
+        self.add_capability(URI::Submission);
+        self.add_method_call(
+            Method::ChangesEmailSubmission,
+            Arguments::changes(
+                self.params(Method::ChangesEmailSubmission),
+                since_state.into(),
+            ),
+        )
+        .changes_mut()
+    }
+
+    pub async fn send_changes_email_submission(self) -> crate::Result<ChangesResponse<()>> {
+        self.send_single().await
+    }
+
+    pub fn query_email_submission(
+        &mut self,
+    ) -> &mut QueryRequest<super::query::Filter, super::query::Comparator, ()> {
+        self.add_capability(URI::Submission);
+        self.add_method_call(
+            Method::QueryEmailSubmission,
+            Arguments::email_submission_query(self.params(Method::QueryEmailSubmission)),
+        )
+        .email_submission_query_mut()
+    }
+
+    pub async fn send_query_email_submission(self) -> crate::Result<QueryResponse> {
+        self.send_single().await
+    }
+
+    pub fn query_email_submission_changes(
+        &mut self,
+        since_query_state: impl Into<String>,
+    ) -> &mut QueryChangesRequest<super::query::Filter, super::query::Comparator, ()> {
+        self.add_capability(URI::Submission);
+        self.add_method_call(
+            Method::QueryChangesEmailSubmission,
+            Arguments::email_submission_query_changes(
+                self.params(Method::QueryChangesEmailSubmission),
+                since_query_state.into(),
+            ),
+        )
+        .email_submission_query_changes_mut()
+    }
+
+    pub async fn send_query_email_submission_changes(self) -> crate::Result<QueryChangesResponse> {
+        self.send_single().await
+    }
+
+    pub fn set_email_submission(
+        &mut self,
+    ) -> &mut SetRequest<EmailSubmission<Set>, super::SetArguments> {
+        self.add_capability(URI::Submission);
+        self.add_method_call(
+            Method::SetEmailSubmission,
+            Arguments::email_submission_set(self.params(Method::SetEmailSubmission)),
+        )
+        .email_submission_set_mut()
+    }
+
+    pub async fn send_set_email_submission(self) -> crate::Result<EmailSubmissionSetResponse> {
+        self.send_single().await
+    }
+}
diff --git a/src/email_submission/mod.rs b/src/email_submission/mod.rs
index 755efcd..635b81b 100644
--- a/src/email_submission/mod.rs
+++ b/src/email_submission/mod.rs
@@ -1,4 +1,5 @@
 pub mod get;
+pub mod helpers;
 pub mod query;
 pub mod set;
 
diff --git a/src/identity/helpers.rs b/src/identity/helpers.rs
new file mode 100644
index 0000000..d2036f3
--- /dev/null
+++ b/src/identity/helpers.rs
@@ -0,0 +1,37 @@
+use crate::{
+    core::{
+        get::GetRequest,
+        request::{Arguments, Request},
+        response::{IdentityGetResponse, IdentitySetResponse},
+        set::SetRequest,
+    },
+    Method, Set,
+};
+
+use super::Identity;
+
+impl Request<'_> {
+    pub fn get_identity(&mut self) -> &mut GetRequest<super::Property, ()> {
+        self.add_method_call(
+            Method::GetIdentity,
+            Arguments::identity_get(self.params(Method::GetIdentity)),
+        )
+        .identity_get_mut()
+    }
+
+    pub async fn send_get_identity(self) -> crate::Result<IdentityGetResponse> {
+        self.send_single().await
+    }
+
+    pub fn set_identity(&mut self) -> &mut SetRequest<Identity<Set>, ()> {
+        self.add_method_call(
+            Method::SetIdentity,
+            Arguments::identity_set(self.params(Method::SetIdentity)),
+        )
+        .identity_set_mut()
+    }
+
+    pub async fn send_set_identity(self) -> crate::Result<IdentitySetResponse> {
+        self.send_single().await
+    }
+}
diff --git a/src/identity/mod.rs b/src/identity/mod.rs
index f251669..3983b0b 100644
--- a/src/identity/mod.rs
+++ b/src/identity/mod.rs
@@ -1,4 +1,5 @@
 pub mod get;
+pub mod helpers;
 pub mod set;
 
 use std::fmt::Display;
diff --git a/src/lib.rs b/src/lib.rs
index ac2b01b..706f50b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -33,7 +33,7 @@ pub enum URI {
     Calendars,
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Copy, Serialize, Deserialize)]
 pub enum Method {
     #[serde(rename = "Core/echo")]
     Echo,
diff --git a/src/mailbox/helpers.rs b/src/mailbox/helpers.rs
index 7cd63de..dd76d4d 100644
--- a/src/mailbox/helpers.rs
+++ b/src/mailbox/helpers.rs
@@ -1,10 +1,15 @@
 use crate::{
     client::Client,
     core::{
-        query::{Comparator, Filter, QueryResponse},
+        changes::{ChangesRequest, ChangesResponse},
+        get::GetRequest,
+        query::{Comparator, Filter, QueryRequest, QueryResponse},
+        query_changes::{QueryChangesRequest, QueryChangesResponse},
+        request::{Arguments, Request},
         response::{MailboxGetResponse, MailboxSetResponse},
-        set::Create,
+        set::{Create, SetRequest},
     },
+    Method, Set,
 };
 
 use super::{Mailbox, Property, Role};
@@ -128,3 +133,80 @@ impl Client {
         request.send_single::<QueryResponse>().await
     }
 }
+
+impl Request<'_> {
+    pub fn get_mailbox(&mut self) -> &mut GetRequest<super::Property, ()> {
+        self.add_method_call(
+            Method::GetMailbox,
+            Arguments::mailbox_get(self.params(Method::GetMailbox)),
+        )
+        .mailbox_get_mut()
+    }
+
+    pub async fn send_get_mailbox(self) -> crate::Result<MailboxGetResponse> {
+        self.send_single().await
+    }
+
+    pub fn changes_mailbox(&mut self, since_state: impl Into<String>) -> &mut ChangesRequest {
+        self.add_method_call(
+            Method::ChangesMailbox,
+            Arguments::changes(self.params(Method::ChangesMailbox), since_state.into()),
+        )
+        .changes_mut()
+    }
+
+    pub async fn send_changes_mailbox(
+        self,
+    ) -> crate::Result<ChangesResponse<super::ChangesResponse>> {
+        self.send_single().await
+    }
+
+    pub fn query_mailbox(
+        &mut self,
+    ) -> &mut QueryRequest<super::query::Filter, super::query::Comparator, super::QueryArguments>
+    {
+        self.add_method_call(
+            Method::QueryMailbox,
+            Arguments::mailbox_query(self.params(Method::QueryMailbox)),
+        )
+        .mailbox_query_mut()
+    }
+
+    pub async fn send_query_mailbox(self) -> crate::Result<QueryResponse> {
+        self.send_single().await
+    }
+
+    pub fn query_mailbox_changes(
+        &mut self,
+        since_query_state: impl Into<String>,
+    ) -> &mut QueryChangesRequest<
+        super::query::Filter,
+        super::query::Comparator,
+        super::QueryArguments,
+    > {
+        self.add_method_call(
+            Method::QueryChangesMailbox,
+            Arguments::mailbox_query_changes(
+                self.params(Method::QueryChangesMailbox),
+                since_query_state.into(),
+            ),
+        )
+        .mailbox_query_changes_mut()
+    }
+
+    pub async fn send_query_mailbox_changes(self) -> crate::Result<QueryChangesResponse> {
+        self.send_single().await
+    }
+
+    pub fn set_mailbox(&mut self) -> &mut SetRequest<Mailbox<Set>, super::SetArguments> {
+        self.add_method_call(
+            Method::SetMailbox,
+            Arguments::mailbox_set(self.params(Method::SetMailbox)),
+        )
+        .mailbox_set_mut()
+    }
+
+    pub async fn send_set_mailbox(self) -> crate::Result<MailboxSetResponse> {
+        self.send_single().await
+    }
+}
diff --git a/src/push_subscription/helpers.rs b/src/push_subscription/helpers.rs
new file mode 100644
index 0000000..190d57e
--- /dev/null
+++ b/src/push_subscription/helpers.rs
@@ -0,0 +1,37 @@
+use crate::{
+    core::{
+        get::GetRequest,
+        request::{Arguments, Request},
+        response::{PushSubscriptionGetResponse, PushSubscriptionSetResponse},
+        set::SetRequest,
+    },
+    Method, Set,
+};
+
+use super::PushSubscription;
+
+impl Request<'_> {
+    pub fn get_push_subscription(&mut self) -> &mut GetRequest<super::Property, ()> {
+        self.add_method_call(
+            Method::GetPushSubscription,
+            Arguments::push_get(self.params(Method::GetPushSubscription)),
+        )
+        .push_get_mut()
+    }
+
+    pub async fn send_get_push_subscription(self) -> crate::Result<PushSubscriptionGetResponse> {
+        self.send_single().await
+    }
+
+    pub fn set_push_subscription(&mut self) -> &mut SetRequest<PushSubscription<Set>, ()> {
+        self.add_method_call(
+            Method::SetPushSubscription,
+            Arguments::push_set(self.params(Method::SetPushSubscription)),
+        )
+        .push_set_mut()
+    }
+
+    pub async fn send_set_push_subscription(self) -> crate::Result<PushSubscriptionSetResponse> {
+        self.send_single().await
+    }
+}
diff --git a/src/push_subscription/mod.rs b/src/push_subscription/mod.rs
index f1e39a0..8c8d78b 100644
--- a/src/push_subscription/mod.rs
+++ b/src/push_subscription/mod.rs
@@ -1,4 +1,5 @@
 pub mod get;
+pub mod helpers;
 pub mod set;
 
 use std::fmt::Display;
diff --git a/src/thread/helpers.rs b/src/thread/helpers.rs
index 5752638..047149f 100644
--- a/src/thread/helpers.rs
+++ b/src/thread/helpers.rs
@@ -1,4 +1,13 @@
-use crate::{client::Client, core::response::ThreadGetResponse};
+use crate::{
+    client::Client,
+    core::{
+        changes::{ChangesRequest, ChangesResponse},
+        get::GetRequest,
+        request::{Arguments, Request},
+        response::ThreadGetResponse,
+    },
+    Method,
+};
 
 use super::Thread;
 
@@ -12,3 +21,29 @@ impl Client {
             .map(|mut r| r.unwrap_list().pop())
     }
 }
+
+impl Request<'_> {
+    pub fn get_thread(&mut self) -> &mut GetRequest<super::Property, ()> {
+        self.add_method_call(
+            Method::GetThread,
+            Arguments::thread_get(self.params(Method::GetThread)),
+        )
+        .thread_get_mut()
+    }
+
+    pub async fn send_get_thread(self) -> crate::Result<ThreadGetResponse> {
+        self.send_single().await
+    }
+
+    pub fn changes_thread(&mut self, since_state: impl Into<String>) -> &mut ChangesRequest {
+        self.add_method_call(
+            Method::ChangesThread,
+            Arguments::changes(self.params(Method::ChangesThread), since_state.into()),
+        )
+        .changes_mut()
+    }
+
+    pub async fn send_changes_thread(self) -> crate::Result<ChangesResponse<()>> {
+        self.send_single().await
+    }
+}
diff --git a/src/thread/mod.rs b/src/thread/mod.rs
index 3e94a41..a2cd68c 100644
--- a/src/thread/mod.rs
+++ b/src/thread/mod.rs
@@ -1,6 +1,8 @@
 pub mod get;
 pub mod helpers;
 
+use std::fmt::Display;
+
 use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -17,3 +19,12 @@ pub enum Property {
     #[serde(rename = "emailIds")]
     EmailIds,
 }
+
+impl Display for Property {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Property::Id => write!(f, "id"),
+            Property::EmailIds => write!(f, "emailIds"),
+        }
+    }
+}
diff --git a/src/vacation_response/helpers.rs b/src/vacation_response/helpers.rs
new file mode 100644
index 0000000..16cdc63
--- /dev/null
+++ b/src/vacation_response/helpers.rs
@@ -0,0 +1,39 @@
+use crate::{
+    core::{
+        get::GetRequest,
+        request::{Arguments, Request},
+        response::{VacationResponseGetResponse, VacationResponseSetResponse},
+        set::SetRequest,
+    },
+    Method, Set, URI,
+};
+
+use super::VacationResponse;
+
+impl Request<'_> {
+    pub fn get_vacation_response(&mut self) -> &mut GetRequest<super::Property, ()> {
+        self.add_capability(URI::VacationResponse);
+        self.add_method_call(
+            Method::GetVacationResponse,
+            Arguments::vacation_response_get(self.params(Method::GetVacationResponse)),
+        )
+        .vacation_response_get_mut()
+    }
+
+    pub async fn send_get_vacation_response(self) -> crate::Result<VacationResponseGetResponse> {
+        self.send_single().await
+    }
+
+    pub fn set_vacation_response(&mut self) -> &mut SetRequest<VacationResponse<Set>, ()> {
+        self.add_capability(URI::VacationResponse);
+        self.add_method_call(
+            Method::SetVacationResponse,
+            Arguments::vacation_response_set(self.params(Method::GetVacationResponse)),
+        )
+        .vacation_response_set_mut()
+    }
+
+    pub async fn send_set_vacation_response(self) -> crate::Result<VacationResponseSetResponse> {
+        self.send_single().await
+    }
+}
diff --git a/src/vacation_response/mod.rs b/src/vacation_response/mod.rs
index bd6f569..4e3a920 100644
--- a/src/vacation_response/mod.rs
+++ b/src/vacation_response/mod.rs
@@ -1,4 +1,5 @@
 pub mod get;
+pub mod helpers;
 pub mod set;
 
 use std::fmt::Display;