diff --git a/core-client/transports/src/transports/mod.rs b/core-client/transports/src/transports/mod.rs
index 00b6f0600..dcbfdeb3b 100644
--- a/core-client/transports/src/transports/mod.rs
+++ b/core-client/transports/src/transports/mod.rs
@@ -98,16 +98,19 @@ pub fn parse_response(
 #[serde(deny_unknown_fields)]
 #[serde(untagged)]
 pub enum ClientResponse {
-	/// A regular JSON-RPC request output (single response).
+	/// A regular JSON-RPC 2.0 request output (single response).
 	Output(jsonrpc_core::Output),
 	/// A notification.
 	Notification(jsonrpc_core::Notification),
+	/// A regular JSON-RPC 1.0 request output (single response).
+	OutputVersionOne(jsonrpc_core::OutputVersionOne),
 }
 
 impl ClientResponse {
 	/// Get the id of the response (if any).
 	pub fn id(&self) -> Option<Id> {
 		match *self {
+			ClientResponse::OutputVersionOne(ref output) => Some(output.id().clone()),
 			ClientResponse::Output(ref output) => Some(output.id().clone()),
 			ClientResponse::Notification(_) => None,
 		}
@@ -117,7 +120,7 @@ impl ClientResponse {
 	pub fn method(&self) -> Option<String> {
 		match *self {
 			ClientResponse::Notification(ref n) => Some(n.method.to_owned()),
-			ClientResponse::Output(_) => None,
+			ClientResponse::Output(_) | ClientResponse::OutputVersionOne(_) => None,
 		}
 	}
 
@@ -140,6 +143,7 @@ impl From<ClientResponse> for Result<Value, Error> {
 	fn from(res: ClientResponse) -> Self {
 		match res {
 			ClientResponse::Output(output) => output.into(),
+			ClientResponse::OutputVersionOne(output) => output.into(),
 			ClientResponse::Notification(n) => match &n.params {
 				Params::Map(map) => {
 					let subscription = map.get("subscription");
diff --git a/core/src/types/mod.rs b/core/src/types/mod.rs
index cb4a28e95..c61fd383d 100644
--- a/core/src/types/mod.rs
+++ b/core/src/types/mod.rs
@@ -15,5 +15,5 @@ pub use self::error::{Error, ErrorCode};
 pub use self::id::Id;
 pub use self::params::Params;
 pub use self::request::{Call, MethodCall, Notification, Request};
-pub use self::response::{Failure, Output, Response, Success};
+pub use self::response::{Failure, Output, OutputVersionOne, Response, Success};
 pub use self::version::Version;
diff --git a/core/src/types/response.rs b/core/src/types/response.rs
index f7d54b07b..1ee88a22c 100644
--- a/core/src/types/response.rs
+++ b/core/src/types/response.rs
@@ -84,6 +84,57 @@ impl From<Output> for CoreResult<Value> {
 	}
 }
 
+/// Represents JSON-RPC v1.x output - failure or success
+#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct OutputVersionOne {
+	/// Result
+	pub result: Option<Value>,
+	/// Error
+	pub error: Option<Error>,
+	/// Correlation id
+	pub id: Id,
+}
+
+impl OutputVersionOne {
+	/// Creates new output given `Result`, `Id` and `Version`.
+	pub fn from(result: CoreResult<Value>, id: Id) -> Self {
+		match result {
+			Ok(result) => OutputVersionOne {
+				id,
+				result: Some(result),
+				error: None,
+			},
+			Err(error) => OutputVersionOne {
+				id,
+				error: Some(error),
+				result: None,
+			},
+		}
+	}
+
+	/// Creates new failure output indicating malformed request.
+	pub fn invalid_request(id: Id) -> Self {
+		OutputVersionOne {
+			id,
+			error: Some(Error::new(ErrorCode::InvalidRequest)),
+			result: None,
+		}
+	}
+
+	/// Get the correlation id.
+	pub fn id(&self) -> &Id {
+		&self.id
+	}
+}
+
+impl From<OutputVersionOne> for CoreResult<Value> {
+	/// Convert into a result. Will be `Ok` if `result` is `Some` and `Err` if `result` is `None`.
+	fn from(output: OutputVersionOne) -> CoreResult<Value> {
+		output.result.ok_or(output.error.unwrap_or(Error::parse_error()))
+	}
+}
+
 /// Synchronous response
 #[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
 #[serde(deny_unknown_fields)]
@@ -145,6 +196,20 @@ fn success_output_serialize() {
 	assert_eq!(serialized, r#"{"jsonrpc":"2.0","result":1,"id":1}"#);
 }
 
+#[test]
+fn success_output_serialize_1point0() {
+	use serde_json::Value;
+
+	let so = OutputVersionOne {
+		result: Some(Value::from(1)),
+		error: None,
+		id: Id::Num(1),
+	};
+
+	let serialized = serde_json::to_string(&so).unwrap();
+	assert_eq!(serialized, r#"{"result":1,"error":null,"id":1}"#);
+}
+
 #[test]
 fn success_output_deserialize() {
 	use serde_json;
@@ -232,6 +297,24 @@ fn single_response_deserialize() {
 	);
 }
 
+#[test]
+fn single_response_deserialize_1point0() {
+	use serde_json;
+	use serde_json::Value;
+
+	let dsr = r#"{"result":1,"error":null,"id":1}"#;
+
+	let deserialized: OutputVersionOne = serde_json::from_str(dsr).unwrap();
+	assert_eq!(
+		deserialized,
+		OutputVersionOne {
+			result: Some(Value::from(1)),
+			error: None,
+			id: Id::Num(1)
+		}
+	);
+}
+
 #[test]
 fn batch_response_deserialize() {
 	use serde_json;