diff --git a/libethereum/Client.cpp b/libethereum/Client.cpp
index 32a24e03d..315b8ed29 100644
--- a/libethereum/Client.cpp
+++ b/libethereum/Client.cpp
@@ -724,6 +724,11 @@ bytes Client::codeAt(Address _a, int _block) const
 	return asOf(_block).code(_a);
 }
 
+Transaction Client::transaction(h256 _transactionHash) const
+{
+	return Transaction(m_bc.transaction(_transactionHash), CheckSignature::Range);
+}
+
 Transaction Client::transaction(h256 _blockHash, unsigned _i) const
 {
 	auto bl = m_bc.block(_blockHash);
@@ -768,6 +773,11 @@ Transactions Client::transactions(h256 _blockHash) const
 	return res;
 }
 
+TransactionHashes Client::transactionHashes(h256 _blockHash) const
+{
+	return m_bc.transactionHashes(_blockHash);
+}
+
 LocalisedLogEntries Client::logs(unsigned _watchId) const
 {
 	try {
diff --git a/libethereum/Client.h b/libethereum/Client.h
index 66a2e5e4d..6217b1d16 100644
--- a/libethereum/Client.h
+++ b/libethereum/Client.h
@@ -236,11 +236,13 @@ public:
 	virtual h256 hashFromNumber(unsigned _number) const { return m_bc.numberHash(_number); }
 	virtual BlockInfo blockInfo(h256 _hash) const { return BlockInfo(m_bc.block(_hash)); }
 	virtual BlockDetails blockDetails(h256 _hash) const { return m_bc.details(_hash); }
+	virtual Transaction transaction(h256 _transactionHash) const;
 	virtual Transaction transaction(h256 _blockHash, unsigned _i) const;
 	virtual BlockInfo uncle(h256 _blockHash, unsigned _i) const;
 	virtual unsigned transactionCount(h256 _blockHash) const;
 	virtual unsigned uncleCount(h256 _blockHash) const;
 	virtual Transactions transactions(h256 _blockHash) const;
+	virtual TransactionHashes transactionHashes(h256 _blockHash) const;
 
 	/// Differences between transactions.
 	using Interface::diff;
diff --git a/libethereum/Interface.h b/libethereum/Interface.h
index 36c222bba..56d24116d 100644
--- a/libethereum/Interface.h
+++ b/libethereum/Interface.h
@@ -37,6 +37,8 @@ namespace dev
 namespace eth
 {
 
+using TransactionHashes = h256s;
+
 /**
  * @brief Main API hub for interfacing with Ethereum.
  */
@@ -101,11 +103,13 @@ public:
 	virtual h256 hashFromNumber(unsigned _number) const = 0;
 	virtual BlockInfo blockInfo(h256 _hash) const = 0;
 	virtual BlockDetails blockDetails(h256 _hash) const = 0;
+	virtual Transaction transaction(h256 _transactionHash) const = 0;
 	virtual Transaction transaction(h256 _blockHash, unsigned _i) const = 0;
 	virtual BlockInfo uncle(h256 _blockHash, unsigned _i) const = 0;
 	virtual unsigned transactionCount(h256 _blockHash) const = 0;
 	virtual unsigned uncleCount(h256 _blockHash) const = 0;
 	virtual Transactions transactions(h256 _blockHash) const = 0;
+	virtual TransactionHashes transactionHashes(h256 _blockHash) const = 0;
 
 	// [EXTRA API]:
 
diff --git a/libweb3jsonrpc/WebThreeStubServerBase.cpp b/libweb3jsonrpc/WebThreeStubServerBase.cpp
index f27c89c6d..68058047e 100644
--- a/libweb3jsonrpc/WebThreeStubServerBase.cpp
+++ b/libweb3jsonrpc/WebThreeStubServerBase.cpp
@@ -88,6 +88,15 @@ static Json::Value toJson(dev::eth::BlockInfo const& _bi, Transactions const& _t
 	return res;
 }
 
+static Json::Value toJson(dev::eth::BlockInfo const& _bi, TransactionHashes const& _ts)
+{
+	Json::Value res = toJson(_bi);
+	res["transactions"] = Json::Value(Json::arrayValue);
+	for (h256 const& t: _ts)
+		res["transactions"].append(toJS(t));
+	return res;
+}
+
 static Json::Value toJson(dev::eth::TransactionSkeleton const& _t)
 {
 	Json::Value res;
@@ -565,7 +574,7 @@ Json::Value WebThreeStubServerBase::eth_getBlockByHash(string const& _blockHash,
 		return toJson(client()->blockInfo(hash), client()->transactions(hash));
 	}
 	
-	return toJson(client()->blockInfo(hash));
+	return toJson(client()->blockInfo(hash), client()->transactionHashes(hash));
 }
 
 Json::Value WebThreeStubServerBase::eth_getBlockByNumber(string const& _blockNumber, bool _includeTransactions)
@@ -603,9 +612,7 @@ Json::Value WebThreeStubServerBase::eth_getTransactionByHash(string const& _tran
 		throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_RPC_INVALID_PARAMS);
 	}
 	
-//	return toJson(client()->transaction(hash, index));
-	// TODO:
-	return "";
+	return toJson(client()->transaction(hash));
 }
 
 Json::Value WebThreeStubServerBase::eth_getTransactionByBlockHashAndIndex(string const& _blockHash, string const& _transactionIndex)
diff --git a/mix/MixClient.cpp b/mix/MixClient.cpp
index 53d5b75a7..2e0270849 100644
--- a/mix/MixClient.cpp
+++ b/mix/MixClient.cpp
@@ -462,6 +462,11 @@ eth::BlockDetails MixClient::blockDetails(h256 _hash) const
 	return bc().details(_hash);
 }
 
+Transaction MixClient::transaction(h256 _transactionHash) const
+{
+	return Transaction(bc().transaction(_transactionHash), CheckSignature::Range);
+}
+
 eth::Transaction MixClient::transaction(h256 _blockHash, unsigned _i) const
 {
 	auto bl = bc().block(_blockHash);
@@ -506,6 +511,11 @@ Transactions MixClient::transactions(h256 _blockHash) const
 	return res;
 }
 
+TransactionHashes MixClient::transactionHashes(h256 _blockHash) const
+{
+	return bc().transactionHashes(_blockHash);
+}
+
 unsigned MixClient::number() const
 {
 	return bc().number();
diff --git a/mix/MixClient.h b/mix/MixClient.h
index 8b565f365..770424a93 100644
--- a/mix/MixClient.h
+++ b/mix/MixClient.h
@@ -68,11 +68,13 @@ public:
 	h256 hashFromNumber(unsigned _number) const override;
 	eth::BlockInfo blockInfo(h256 _hash) const override;
 	eth::BlockDetails blockDetails(h256 _hash) const override;
+	eth::Transaction transaction(h256 _transactionHash) const override;
 	eth::Transaction transaction(h256 _blockHash, unsigned _i) const override;
 	eth::BlockInfo uncle(h256 _blockHash, unsigned _i) const override;
 	unsigned transactionCount(h256 _blockHash) const override;
 	unsigned uncleCount(h256 _blockHash) const override;
 	eth::Transactions transactions(h256 _blockHash) const override;
+	eth::TransactionHashes transactionHashes(h256 _blockHash) const override;
 	unsigned number() const override;
 	eth::Transactions pending() const override;
 	eth::StateDiff diff(unsigned _txi, h256 _block) const override;