diff --git a/openprocurement_client/api_base_client.py b/openprocurement_client/api_base_client.py
index 8a3f1e2..f25c15a 100644
--- a/openprocurement_client/api_base_client.py
+++ b/openprocurement_client/api_base_client.py
@@ -151,7 +151,10 @@ def _get_resource_item(self, url, headers=None):
         _headers.update(headers or {})
         response_item = self.request('GET', url, headers=_headers)
         if response_item.status_code == 200:
-            return munchify(loads(response_item.text))
+            data = loads(response_item.text)
+            if "x-revision-n" in response_item.headers:
+                data["x_revision_n"] = response_item.headers.get("x-revision-n")
+            return munchify(data)
         raise InvalidResponse(response_item)
 
     def _patch_resource_item(self, url, payload, headers=None):
@@ -238,10 +241,16 @@ def upload_document(self, file_, obj, use_ds_client=True,
             doc_registration=doc_registration
         )
 
-    def get_resource_item(self, id, headers=None):
-        return self._get_resource_item('{}/{}'.format(self.prefix_path, id),
+    def get_resource_item(self, item_id, headers=None):
+        return self._get_resource_item('{}/{}'.format(self.prefix_path, item_id),
                                        headers=headers)
 
+    def get_resource_item_historical(self, item_id, revision="", headers=None):
+        _headers = {"x-revision-n": str(revision)}
+        if headers:
+            _headers.update(headers)
+        return self._get_resource_item('{}/{}/historical'.format(self.prefix_path, item_id), headers=_headers)
+
     def patch_credentials(self, id, access_token):
         return self._patch_resource_item(
             '{}/{}/credentials'.format(self.prefix_path, id),
diff --git a/openprocurement_client/tests/main.py b/openprocurement_client/tests/main.py
index 17c9333..d5dec6c 100644
--- a/openprocurement_client/tests/main.py
+++ b/openprocurement_client/tests/main.py
@@ -1,12 +1,13 @@
 import unittest
 
-from openprocurement_client.tests import tests, tests_sync
+from openprocurement_client.tests import tests, tests_sync, tests_api_base_client
 
 
 def suite():
     suite = unittest.TestSuite()
     suite.addTest(tests.suite())
     suite.addTest(tests_sync.suite())
+    suite.addTest(tests_api_base_client.suite())
     return suite
 
 
diff --git a/openprocurement_client/tests/tests_api_base_client.py b/openprocurement_client/tests/tests_api_base_client.py
new file mode 100644
index 0000000..18e088c
--- /dev/null
+++ b/openprocurement_client/tests/tests_api_base_client.py
@@ -0,0 +1,69 @@
+import unittest
+import uuid
+from mock import MagicMock
+from json import dumps
+from copy import deepcopy
+
+from openprocurement_client.api_base_client import APIBaseClient
+from openprocurement_client.exceptions import InvalidResponse
+
+
+CLIENT_CONFIG = {
+    "key": "",
+    "resource": "tenders",
+    "host_url": "http://lb.api-sandbox.openprocurement.org/",
+    "api_version": "2.4"
+}
+
+
+class TestAPIBaseClient(unittest.TestCase):
+    def setUp(self):
+        self.client = APIBaseClient(**CLIENT_CONFIG)
+
+    def test_get_resource_item_historical(self):
+        class Response(object):
+            def __init__(self, status_code, text=None, headers=None):
+                self.status_code = status_code
+                self.text = text
+                self.headers = headers
+
+        revisions_limit = 42
+        response_text = {
+            "id": uuid.uuid4().hex,
+            "rev": 24
+        }
+
+        side_effect = [
+            Response(200, dumps(response_text), {"x-revision-n": str(revisions_limit)}),
+            Response(200, dumps(response_text), {"x-revision-n": str(revisions_limit)}),
+            Response(200, dumps(response_text), {"x-revision-n": str(revisions_limit - 1)}),
+            Response(404),
+            Response(404),
+            Response(404),
+        ]
+
+        self.client.request = MagicMock(side_effect=side_effect)
+
+        actual_response = deepcopy(response_text)
+        actual_response["x_revision_n"] = str(revisions_limit)
+        item_id = response_text["id"]
+        self.assertEqual(self.client.get_resource_item_historical(item_id, revision=""), actual_response)
+        self.assertEqual(self.client.get_resource_item_historical(item_id, revision=revisions_limit), actual_response)
+        actual_response["x_revision_n"] = str(revisions_limit - 1)
+        self.assertEqual(self.client.get_resource_item_historical(
+            item_id, revision=revisions_limit - 1), actual_response)
+
+        for revision in (0, revisions_limit + 1, None):
+            with self.assertRaises(InvalidResponse) as e:
+                self.client.get_resource_item_historical(item_id, revision=revision)
+            self.assertEqual(e.exception.status_code, 404)
+
+
+def suite():
+    suite = unittest.TestSuite()
+    suite.addTest(unittest.makeSuite(TestAPIBaseClient))
+    return suite
+
+
+if __name__ == "__main__":
+    unittest.main(defaultTest='suite')
\ No newline at end of file