diff --git a/parity/dapps.rs b/parity/dapps.rs
index bbd5f4960..29268e904 100644
--- a/parity/dapps.rs
+++ b/parity/dapps.rs
@@ -59,7 +59,7 @@ impl Default for Configuration {
 }
 
 pub struct Dependencies {
-	pub apis: Arc<rpc_apis::Dependencies>,
+	pub apis: Arc<rpc_apis::FullDependencies>,
 	pub client: Arc<Client>,
 	pub sync: Arc<SyncProvider>,
 	pub remote: parity_reactor::TokioRemote,
@@ -182,7 +182,7 @@ mod server {
 		} else {
 			rpc_apis::ApiSet::UnsafeContext
 		};
-		let apis = rpc_apis::setup_rpc(deps.stats, deps.apis.clone(), api_set);
+		let apis = rpc_apis::setup_rpc(deps.stats, &*deps.apis, api_set);
 		let start_result = match auth {
 			None => {
 				server.start_unsecured_http(url, apis, deps.remote)
diff --git a/parity/rpc.rs b/parity/rpc.rs
index a435f24db..e4307f09b 100644
--- a/parity/rpc.rs
+++ b/parity/rpc.rs
@@ -82,8 +82,8 @@ impl fmt::Display for IpcConfiguration {
 	}
 }
 
-pub struct Dependencies {
-	pub apis: Arc<rpc_apis::Dependencies>,
+pub struct Dependencies<D: rpc_apis::Dependencies> {
+	pub apis: Arc<D>,
 	pub remote: TokioRemote,
 	pub stats: Arc<RpcStats>,
 }
@@ -109,7 +109,9 @@ impl rpc::IpcMetaExtractor<Metadata> for RpcExtractor {
 	}
 }
 
-pub fn new_http(conf: HttpConfiguration, deps: &Dependencies) -> Result<Option<HttpServer>, String> {
+pub fn new_http<D>(conf: HttpConfiguration, deps: &Dependencies<D>) -> Result<Option<HttpServer>, String>
+	where D: rpc_apis::Dependencies
+{
 	if !conf.enabled {
 		return Ok(None);
 	}
@@ -119,12 +121,14 @@ pub fn new_http(conf: HttpConfiguration, deps: &Dependencies) -> Result<Option<H
 	Ok(Some(setup_http_rpc_server(deps, &addr, conf.cors, conf.hosts, conf.apis)?))
 }
 
-fn setup_apis(apis: ApiSet, deps: &Dependencies) -> MetaIoHandler<Metadata, Middleware> {
-	rpc_apis::setup_rpc(deps.stats.clone(), deps.apis.clone(), apis)
+fn setup_apis<D>(apis: ApiSet, deps: &Dependencies<D>) -> MetaIoHandler<Metadata, Middleware<D::Notifier>>
+	where D: rpc_apis::Dependencies
+{
+	rpc_apis::setup_rpc(deps.stats.clone(), &*deps.apis, apis)
 }
 
-pub fn setup_http_rpc_server(
-	dependencies: &Dependencies,
+pub fn setup_http_rpc_server<D: rpc_apis::Dependencies>(
+	dependencies: &Dependencies<D>,
 	url: &SocketAddr,
 	cors_domains: Option<Vec<String>>,
 	allowed_hosts: Option<Vec<String>>,
@@ -145,12 +149,12 @@ pub fn setup_http_rpc_server(
 	}
 }
 
-pub fn new_ipc(conf: IpcConfiguration, deps: &Dependencies) -> Result<Option<IpcServer>, String> {
+pub fn new_ipc<D: rpc_apis::Dependencies>(conf: IpcConfiguration, deps: &Dependencies<D>) -> Result<Option<IpcServer>, String> {
 	if !conf.enabled { return Ok(None); }
 	Ok(Some(setup_ipc_rpc_server(deps, &conf.socket_addr, conf.apis)?))
 }
 
-pub fn setup_ipc_rpc_server(dependencies: &Dependencies, addr: &str, apis: ApiSet) -> Result<IpcServer, String> {
+pub fn setup_ipc_rpc_server<D: rpc_apis::Dependencies>(dependencies: &Dependencies<D>, addr: &str, apis: ApiSet) -> Result<IpcServer, String> {
 	let handler = setup_apis(apis, dependencies);
 	let remote = dependencies.remote.clone();
 	match rpc::start_ipc(addr, handler, remote, RpcExtractor) {
diff --git a/parity/rpc_apis.rs b/parity/rpc_apis.rs
index 469245c19..a27fbfa26 100644
--- a/parity/rpc_apis.rs
+++ b/parity/rpc_apis.rs
@@ -27,7 +27,7 @@ use ethcore::client::Client;
 use ethcore::miner::{Miner, ExternalMiner};
 use ethcore::snapshot::SnapshotService;
 use ethcore_rpc::{Metadata, NetworkSettings};
-use ethcore_rpc::informant::{Middleware, RpcStats, ClientNotifier};
+use ethcore_rpc::informant::{ActivityNotifier, Middleware, RpcStats, ClientNotifier};
 use ethcore_rpc::dispatch::FullDispatcher;
 use ethsync::{ManageNetwork, SyncProvider};
 use hash_fetch::fetch::Client as FetchClient;
@@ -112,25 +112,6 @@ impl FromStr for ApiSet {
 	}
 }
 
-pub struct Dependencies {
-	pub signer_service: Arc<SignerService>,
-	pub client: Arc<Client>,
-	pub snapshot: Arc<SnapshotService>,
-	pub sync: Arc<SyncProvider>,
-	pub net: Arc<ManageNetwork>,
-	pub secret_store: Arc<AccountProvider>,
-	pub miner: Arc<Miner>,
-	pub external_miner: Arc<ExternalMiner>,
-	pub logger: Arc<RotatingLogger>,
-	pub settings: Arc<NetworkSettings>,
-	pub net_service: Arc<ManageNetwork>,
-	pub updater: Arc<Updater>,
-	pub geth_compatibility: bool,
-	pub dapps_interface: Option<String>,
-	pub dapps_port: Option<u16>,
-	pub fetch: FetchClient,
-}
-
 fn to_modules(apis: &[Api]) -> BTreeMap<String, String> {
 	let mut modules = BTreeMap::new();
 	for api in apis {
@@ -151,6 +132,145 @@ fn to_modules(apis: &[Api]) -> BTreeMap<String, String> {
 	modules
 }
 
+/// RPC dependencies can be used to initialize RPC endpoints from APIs.
+pub trait Dependencies {
+	type Notifier: ActivityNotifier;
+
+	/// Create the activity notifier.
+	fn activity_notifier(&self) -> Self::Notifier;
+
+	/// Extend the given I/O handler with endpoints for each API.
+	fn extend_with_set(&self, handler: &mut MetaIoHandler<Metadata, Middleware<Self::Notifier>>, apis: &[Api]);
+}
+
+/// RPC dependencies for a full node.
+pub struct FullDependencies {
+	pub signer_service: Arc<SignerService>,
+	pub client: Arc<Client>,
+	pub snapshot: Arc<SnapshotService>,
+	pub sync: Arc<SyncProvider>,
+	pub net: Arc<ManageNetwork>,
+	pub secret_store: Arc<AccountProvider>,
+	pub miner: Arc<Miner>,
+	pub external_miner: Arc<ExternalMiner>,
+	pub logger: Arc<RotatingLogger>,
+	pub settings: Arc<NetworkSettings>,
+	pub net_service: Arc<ManageNetwork>,
+	pub updater: Arc<Updater>,
+	pub geth_compatibility: bool,
+	pub dapps_interface: Option<String>,
+	pub dapps_port: Option<u16>,
+	pub fetch: FetchClient,
+}
+
+impl Dependencies for FullDependencies {
+	type Notifier = ClientNotifier;
+
+	fn activity_notifier(&self) -> ClientNotifier {
+		ClientNotifier {
+			client: self.client.clone(),
+		}
+	}
+
+	fn extend_with_set(&self, handler: &mut MetaIoHandler<Metadata, Middleware>, apis: &[Api]) {
+		use ethcore_rpc::v1::*;
+
+		macro_rules! add_signing_methods {
+			($namespace:ident, $handler:expr, $deps:expr) => {
+				{
+					let deps = &$deps;
+					let dispatcher = FullDispatcher::new(Arc::downgrade(&deps.client), Arc::downgrade(&deps.miner));
+					if deps.signer_service.is_enabled() {
+						$handler.extend_with($namespace::to_delegate(SigningQueueClient::new(&deps.signer_service, dispatcher, &deps.secret_store)))
+					} else {
+						$handler.extend_with($namespace::to_delegate(SigningUnsafeClient::new(&deps.secret_store, dispatcher)))
+					}
+				}
+			}
+		}
+
+		let dispatcher = FullDispatcher::new(Arc::downgrade(&self.client), Arc::downgrade(&self.miner));
+		for api in apis {
+			match *api {
+				Api::Web3 => {
+					handler.extend_with(Web3Client::new().to_delegate());
+				},
+				Api::Net => {
+					handler.extend_with(NetClient::new(&self.sync).to_delegate());
+				},
+				Api::Eth => {
+					let client = EthClient::new(
+						&self.client,
+						&self.snapshot,
+						&self.sync,
+						&self.secret_store,
+						&self.miner,
+						&self.external_miner,
+						EthClientOptions {
+							pending_nonce_from_queue: self.geth_compatibility,
+							allow_pending_receipt_query: !self.geth_compatibility,
+							send_block_number_in_get_work: !self.geth_compatibility,
+						}
+					);
+					handler.extend_with(client.to_delegate());
+
+					let filter_client = EthFilterClient::new(&self.client, &self.miner);
+					handler.extend_with(filter_client.to_delegate());
+
+					add_signing_methods!(EthSigning, handler, self);
+				},
+				Api::Personal => {
+					handler.extend_with(PersonalClient::new(&self.secret_store, dispatcher.clone(), self.geth_compatibility).to_delegate());
+				},
+				Api::Signer => {
+					handler.extend_with(SignerClient::new(&self.secret_store, dispatcher.clone(), &self.signer_service).to_delegate());
+				},
+				Api::Parity => {
+					let signer = match self.signer_service.is_enabled() {
+						true => Some(self.signer_service.clone()),
+						false => None,
+					};
+					handler.extend_with(ParityClient::new(
+						&self.client,
+						&self.miner,
+						&self.sync,
+						&self.updater,
+						&self.net_service,
+						&self.secret_store,
+						self.logger.clone(),
+						self.settings.clone(),
+						signer,
+						self.dapps_interface.clone(),
+						self.dapps_port,
+					).to_delegate());
+
+					add_signing_methods!(EthSigning, handler, self);
+					add_signing_methods!(ParitySigning, handler, self);
+				},
+				Api::ParityAccounts => {
+					handler.extend_with(ParityAccountsClient::new(&self.secret_store).to_delegate());
+				},
+				Api::ParitySet => {
+					handler.extend_with(ParitySetClient::new(
+						&self.client,
+						&self.miner,
+						&self.updater,
+						&self.net_service,
+						self.fetch.clone(),
+					).to_delegate())
+				},
+				Api::Traces => {
+					handler.extend_with(TracesClient::new(&self.client, &self.miner).to_delegate())
+				},
+				Api::Rpc => {
+					let modules = to_modules(&apis);
+					handler.extend_with(RpcClient::new(modules).to_delegate());
+				}
+			}
+		}
+	}
+}
+
 impl ApiSet {
 	pub fn list_apis(&self) -> HashSet<Api> {
 		let mut safe_list = vec![Api::Web3, Api::Net, Api::Eth, Api::Parity, Api::Traces, Api::Rpc]
@@ -172,110 +292,12 @@ impl ApiSet {
 	}
 }
 
-macro_rules! add_signing_methods {
-	($namespace:ident, $handler:expr, $deps:expr) => {
-		{
-			let handler = &mut $handler;
-			let deps = &$deps;
-			let dispatcher = FullDispatcher::new(Arc::downgrade(&deps.client), Arc::downgrade(&deps.miner));
-			if deps.signer_service.is_enabled() {
-				handler.extend_with($namespace::to_delegate(SigningQueueClient::new(&deps.signer_service, dispatcher, &deps.secret_store)))
-			} else {
-				handler.extend_with($namespace::to_delegate(SigningUnsafeClient::new(&deps.secret_store, dispatcher)))
-			}
-		}
-	}
-}
-
-pub fn setup_rpc(stats: Arc<RpcStats>, deps: Arc<Dependencies>, apis: ApiSet) -> MetaIoHandler<Metadata, Middleware> {
-	use ethcore_rpc::v1::*;
-
-	let mut handler = MetaIoHandler::with_middleware(Middleware::new(stats, ClientNotifier {
-		client: deps.client.clone(),
-	}));
-
+pub fn setup_rpc<D: Dependencies>(stats: Arc<RpcStats>, deps: &D, apis: ApiSet) -> MetaIoHandler<Metadata, Middleware<D::Notifier>> {
+	let mut handler = MetaIoHandler::with_middleware(Middleware::new(stats, deps.activity_notifier()));
 	// it's turned into vector, cause ont of the cases requires &[]
 	let apis = apis.list_apis().into_iter().collect::<Vec<_>>();
-	let dispatcher = FullDispatcher::new(Arc::downgrade(&deps.client), Arc::downgrade(&deps.miner));
+	deps.extend_with_set(&mut handler, &apis[..]);
 
-	for api in &apis {
-		match *api {
-			Api::Web3 => {
-				handler.extend_with(Web3Client::new().to_delegate());
-			},
-			Api::Net => {
-				handler.extend_with(NetClient::new(&deps.sync).to_delegate());
-			},
-			Api::Eth => {
-				let client = EthClient::new(
-					&deps.client,
-					&deps.snapshot,
-					&deps.sync,
-					&deps.secret_store,
-					&deps.miner,
-					&deps.external_miner,
-					EthClientOptions {
-						pending_nonce_from_queue: deps.geth_compatibility,
-						allow_pending_receipt_query: !deps.geth_compatibility,
-						send_block_number_in_get_work: !deps.geth_compatibility,
-					}
-				);
-				handler.extend_with(client.to_delegate());
-
-				let filter_client = EthFilterClient::new(&deps.client, &deps.miner);
-				handler.extend_with(filter_client.to_delegate());
-
-				add_signing_methods!(EthSigning, handler, deps);
-			},
-			Api::Personal => {
-				handler.extend_with(PersonalClient::new(&deps.secret_store, dispatcher.clone(), deps.geth_compatibility).to_delegate());
-			},
-			Api::Signer => {
-				handler.extend_with(SignerClient::new(&deps.secret_store, dispatcher.clone(), &deps.signer_service).to_delegate());
-			},
-			Api::Parity => {
-				let signer = match deps.signer_service.is_enabled() {
-					true => Some(deps.signer_service.clone()),
-					false => None,
-				};
-				handler.extend_with(ParityClient::new(
-					&deps.client,
-					&deps.miner,
-					&deps.sync,
-					&deps.updater,
-					&deps.net_service,
-					&deps.secret_store,
-					deps.logger.clone(),
-					deps.settings.clone(),
-					signer,
-					deps.dapps_interface.clone(),
-					deps.dapps_port,
-				).to_delegate());
-
-				add_signing_methods!(EthSigning, handler, deps);
-				add_signing_methods!(ParitySigning, handler, deps);
-			},
-			Api::ParityAccounts => {
-				handler.extend_with(ParityAccountsClient::new(&deps.secret_store).to_delegate());
-			},
-			Api::ParitySet => {
-				handler.extend_with(ParitySetClient::new(
-					&deps.client,
-					&deps.miner,
-					&deps.updater,
-					&deps.net_service,
-					deps.fetch.clone(),
-				).to_delegate())
-			},
-			Api::Traces => {
-				handler.extend_with(TracesClient::new(&deps.client, &deps.miner).to_delegate())
-			},
-			Api::Rpc => {
-				let modules = to_modules(&apis);
-				handler.extend_with(RpcClient::new(modules).to_delegate());
-			}
-		}
-	}
 	handler
 }
 
diff --git a/parity/run.rs b/parity/run.rs
index 92aba9ed7..be4e25f97 100644
--- a/parity/run.rs
+++ b/parity/run.rs
@@ -498,7 +498,7 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
 	// set up dependencies for rpc servers
 	let rpc_stats = Arc::new(informant::RpcStats::default());
 	let signer_path = cmd.signer_conf.signer_path.clone();
-	let deps_for_rpc_apis = Arc::new(rpc_apis::Dependencies {
+	let deps_for_rpc_apis = Arc::new(rpc_apis::FullDependencies {
 		signer_service: Arc::new(rpc_apis::SignerService::new(move || {
 			signer::generate_new_token(signer_path.clone()).map_err(|e| format!("{:?}", e))
 		}, cmd.ui_address)),
@@ -553,7 +553,8 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
 		remote: event_loop.raw_remote(),
 		rpc_stats: rpc_stats.clone(),
 	};
-	let signer_server = signer::start(cmd.signer_conf.clone(), signer_deps)?;
+	let signing_queue = deps_for_rpc_apis.signer_service.queue();
+	let signer_server = signer::start(cmd.signer_conf.clone(), signing_queue, signer_deps)?;
 
 	// secret store key server
 	let secretstore_deps = secretstore::Dependencies { };
diff --git a/parity/signer.rs b/parity/signer.rs
index 0d71604d4..b4c70494d 100644
--- a/parity/signer.rs
+++ b/parity/signer.rs
@@ -23,7 +23,7 @@ pub use ethcore_signer::Server as SignerServer;
 use ansi_term::Colour;
 use dir::default_data_path;
 use ethcore_rpc::informant::RpcStats;
-use ethcore_rpc;
+use ethcore_rpc::{self, ConfirmationsQueue};
 use ethcore_signer as signer;
 use helpers::replace_home;
 use parity_reactor::TokioRemote;
@@ -55,8 +55,8 @@ impl Default for Configuration {
 	}
 }
 
-pub struct Dependencies {
-	pub apis: Arc<rpc_apis::Dependencies>,
+pub struct Dependencies<D: rpc_apis::Dependencies> {
+	pub apis: Arc<D>,
 	pub remote: TokioRemote,
 	pub rpc_stats: Arc<RpcStats>,
 }
@@ -77,11 +77,15 @@ impl signer::MetaExtractor<ethcore_rpc::Metadata> for StandardExtractor {
 	}
 }
 
-pub fn start(conf: Configuration, deps: Dependencies) -> Result<Option<SignerServer>, String> {
+pub fn start<D: rpc_apis::Dependencies>(
+	conf: Configuration,
+	queue: Arc<ConfirmationsQueue>,
+	deps: Dependencies<D>,
+) -> Result<Option<SignerServer>, String> {
 	if !conf.enabled {
 		Ok(None)
 	} else {
-		Ok(Some(do_start(conf, deps)?))
+		Ok(Some(do_start(conf, queue, deps)?))
 	}
 }
 
@@ -125,14 +129,18 @@ pub fn generate_new_token(path: String) -> io::Result<String> {
 	Ok(code)
 }
 
-fn do_start(conf: Configuration, deps: Dependencies) -> Result<SignerServer, String> {
+fn do_start<D: rpc_apis::Dependencies>(
+	conf: Configuration,
+	queue: Arc<ConfirmationsQueue>,
+	deps: Dependencies<D>
+) -> Result<SignerServer, String> {
 	let addr = format!("{}:{}", conf.interface, conf.port)
 		.parse()
 		.map_err(|_| format!("Invalid port specified: {}", conf.port))?;
 
 	let start_result = {
 		let server = signer::ServerBuilder::new(
-			deps.apis.signer_service.queue(),
+			queue,
 			codes_path(conf.signer_path),
 		);
 		if conf.skip_origin_validation {
@@ -141,7 +149,7 @@ fn do_start(conf: Configuration, deps: Dependencies) -> Result<SignerServer, Str
 		}
 		let server = server.skip_origin_validation(conf.skip_origin_validation);
 		let server = server.stats(deps.rpc_stats.clone());
-		let handler = rpc_apis::setup_rpc(deps.rpc_stats, deps.apis, rpc_apis::ApiSet::SafeContext);
+		let handler = rpc_apis::setup_rpc(deps.rpc_stats, &*deps.apis, rpc_apis::ApiSet::SafeContext);
 		let remote = deps.remote.clone();
 		server.start_with_extractor(addr, handler, remote, StandardExtractor)
 	};