diff --git a/concordia-server/concordia_server.cpp b/concordia-server/concordia_server.cpp
index 13a2c94..b11eac9 100644
--- a/concordia-server/concordia_server.cpp
+++ b/concordia-server/concordia_server.cpp
@@ -312,6 +312,25 @@ std::string ConcordiaServer::handleRequest(std::string & requestString) {
                 jsonWriter.String("newSourceId");
                 jsonWriter.Int(newId);
                 jsonWriter.EndObject();
+            } else if (operation == ADD_SOURCES_OP) {
+
+                std::vector<int> externalIds;
+                std::vector<std::string> names;
+                std::vector<std::string> links;
+
+                const rapidjson::Value & sourcesArray = d[SOURCES_PARAM];
+                for (rapidjson::SizeType i = 0; i < sourcesArray.Size(); i++) {
+                    externalIds.push_back(sourcesArray[i][0].GetInt());                   
+                    names.push_back(sourcesArray[i][1].GetString());                   
+                    links.push_back(sourcesArray[i][2].GetString());                   
+                }
+
+                _sourceDAO.addSources(externalIds, names, links);
+
+                jsonWriter.StartObject();
+                jsonWriter.String("status");
+                jsonWriter.String("success");
+                jsonWriter.EndObject();
             } else {
                 JsonGenerator::signalError(jsonWriter, "no such operation: " + operation);
             }
diff --git a/concordia-server/config.hpp.in b/concordia-server/config.hpp.in
index 88bb67d..6599031 100644
--- a/concordia-server/config.hpp.in
+++ b/concordia-server/config.hpp.in
@@ -30,6 +30,7 @@
 #define INTERVALS_PARAM "intervals"
 #define EXTERNAL_ID_PARAM "externalId"
 #define LINK_PARAM "link"
+#define SOURCES_PARAM "sources"
 
 #define ADD_SENTENCE_OP "addSentence"
 #define ADD_SENTENCES_OP "addSentences"
@@ -49,5 +50,6 @@
 #define CONCORDIA_PHRASE_SEARCH_OP "concordiaPhraseSearch"
 #define ADD_TM_OP "addTm"
 #define ADD_SOURCE_OP "addSource"
+#define ADD_SOURCES_OP "addSources"
 
 #define LEMMATIZER_DELIMITER "@#@"
diff --git a/concordia-server/source_dao.cpp b/concordia-server/source_dao.cpp
index a40fb84..4ab51ca 100644
--- a/concordia-server/source_dao.cpp
+++ b/concordia-server/source_dao.cpp
@@ -34,4 +34,38 @@ int SourceDAO::addSource(const int externalId, const std::string & name, const s
 
     return newId;
 
-}
\ No newline at end of file
+}
+
+void SourceDAO::addSources(const std::vector<int> & externalIds,
+                           const std::vector<std::string> & names,
+                           const std::vector<std::string> & links) {
+
+
+
+    DBconnection connection;
+    connection.startTransaction();
+
+    for(int i=0;i<externalIds.size();i++) {
+        int externalId = externalIds.at(i);
+        std::string name = names.at(i);
+        std::string link = links.at(i);
+
+        std::string query = "INSERT INTO source(external_id, name, link) values($1::integer,$2::text,$3::text) RETURNING id";
+        std::vector<QueryParam*> params;
+        params.push_back(new IntParam(externalId));
+        params.push_back(new StringParam(name));
+        params.push_back(new StringParam(link));
+
+        PGresult * result = connection.execute(query, params);
+        connection.clearResult(result);
+        BOOST_FOREACH (QueryParam * param, params) {
+            delete param;
+        }
+
+    }
+
+    connection.endTransaction();
+
+
+
+}
diff --git a/concordia-server/source_dao.hpp b/concordia-server/source_dao.hpp
index 09cd89e..c7ca509 100644
--- a/concordia-server/source_dao.hpp
+++ b/concordia-server/source_dao.hpp
@@ -17,6 +17,10 @@ public:
 
     int addSource(const int externalId, const std::string & name, const std::string & link);
 
+    void addSources(const std::vector<int> & externalIds,
+                    const std::vector<std::string> & names,
+                    const std::vector<std::string> & links);
+
 private:
 
 };
diff --git a/tests/addFastAlignedTM.py b/tests/addFastAlignedTM.py
index 213a8b2..64fc9bb 100755
--- a/tests/addFastAlignedTM.py
+++ b/tests/addFastAlignedTM.py
@@ -24,7 +24,7 @@ def file_len(fname):
 def add_examples(examplesData):
     req = urllib2.Request(address)
     req.add_header('Content-Type', 'application/json')
-    response = json.loads(urllib2.urlopen(req, json.dumps(examplesData), 3600).read())
+    response = json.loads(urllib2.urlopen(req, json.dumps(examplesData), timeout = 3600).read())
     print(response)
     if response['status'] == 'error':
         raise Exception(response['message'])
@@ -64,7 +64,7 @@ data = {
 
 req = urllib2.Request(address)
 req.add_header('Content-Type', 'application/json')
-response = json.loads(urllib2.urlopen(req, json.dumps(data), 3600).read())
+response = json.loads(urllib2.urlopen(req, json.dumps(data), timeout = 3600).read())
 print(response)
 tmId = int(response['newTmId'])
 print "Added new tm: %d" % tmId
@@ -111,7 +111,7 @@ data = {
 }
 req = urllib2.Request(address)
 req.add_header('Content-Type', 'application/json')
-urllib2.urlopen(req, json.dumps(data), 3600).read()
+urllib2.urlopen(req, json.dumps(data), timeout = 3600).read()
 
 end = time.time()
 print "Index regeneration complete. The operation took %.4f s" % (end - start)
diff --git a/tests/addSources.py b/tests/addSources.py
index 004caad..193e727 100755
--- a/tests/addSources.py
+++ b/tests/addSources.py
@@ -7,6 +7,20 @@ import sys
 import time
 import host
 
+BUFFER_SIZE = 500
+
+
+def addSources(sources_buffer):
+	data = {
+	    'operation': 'addSources',
+	    'sources':sources
+	}
+
+	req = urllib2.Request(address)
+	req.add_header('Content-Type', 'application/json')
+	urllib2.urlopen(req, json.dumps(data))
+
+
 address = 'http://'+host.concordia_host
 if len(host.concordia_port) > 0:
     address += ':'+host.concordia_port
@@ -14,23 +28,20 @@ if len(host.concordia_port) > 0:
 
 with open(sys.argv[1]) as sources_file:
 	counter = 0
+	sources_buffer = []
 	for line in sources_file:
 		counter += 1
-		idStr, link, name = line.rstrip().split('\t')
+		sources_buffer.append(line.rstrip().split('\t'))
+		if len(sources_buffer) == BUFFER_SIZE:
+			addSources(sources_buffer)
+			sources_buffer = []
+			print("Added %d sources" % counter)
+			
+
+if len(sources_buffer) > 0:
+	addSources(sources_buffer)
+
+print("Added all %d sources" % counter)
 
 
-		data = {
-		    'operation': 'addSource',
-		    'externalId':int(idStr),
-		    'name':name,
-		    'link':link
-		}
-
-		req = urllib2.Request(address)
-		req.add_header('Content-Type', 'application/json')
-		urllib2.urlopen(req, json.dumps(data)).read()
-
-		if counter % 1000 == 0:
-			print("Done %d sources" % counter)
-