diff --git a/tcms/rpc/api/testcase.py b/tcms/rpc/api/testcase.py
index c91983a7d7..b17bd93b2c 100644
--- a/tcms/rpc/api/testcase.py
+++ b/tcms/rpc/api/testcase.py
@@ -10,12 +10,13 @@
 from tcms.rpc import utils
 from tcms.rpc.api.forms.testcase import NewForm, UpdateForm
 from tcms.rpc.decorators import permissions_required
-from tcms.testcases.models import TestCase
+from tcms.testcases.models import TestCase, TestCasePlan
 
 __all__ = (
     'create',
     'update',
     'filter',
+    'sortkeys',
     'remove',
 
     'add_comment',
@@ -280,6 +281,27 @@ def filter(query=None):  # pylint: disable=redefined-builtin
     return TestCase.to_xmlrpc(query)
 
 
+@permissions_required('testcases.view_testcase')
+@rpc_method(name='TestCase.sortkeys')
+def sortkeys(query=None):
+    """
+    .. function:: RPC TestCase.sortkeys(query)
+
+        Return information about TestCase position inside TestPlan.
+
+        For example `TestCase.sortkeys({'plan': 3})`
+
+        :param query: Field lookups for :class:`tcms.testcases.models.TestCasePlan`
+        :type query: dict
+        :return: Serialized list of :class:`tcms.testcases.models.TestCasePlan` objects.
+        :rtype: list(dict)
+    """
+    if query is None:
+        query = {}
+
+    return list(TestCasePlan.objects.filter(**query).values())
+
+
 @permissions_required('testcases.change_testcase')
 @rpc_method(name='TestCase.update')
 def update(case_id, values):
diff --git a/tcms/rpc/tests/test_testcase.py b/tcms/rpc/tests/test_testcase.py
index c568cf7eaf..96c08e8956 100644
--- a/tcms/rpc/tests/test_testcase.py
+++ b/tcms/rpc/tests/test_testcase.py
@@ -8,7 +8,7 @@
 
 from tcms.core.helpers.comments import get_comments
 from tcms.management.models import Priority
-from tcms.rpc.tests.utils import APITestCase
+from tcms.rpc.tests.utils import APITestCase, APIPermissionsTestCase
 from tcms.testcases.models import Category, TestCase, TestCaseStatus
 from tcms.tests import remove_perm_from_user
 from tcms.tests.factories import (CategoryFactory, ComponentFactory,
@@ -539,3 +539,45 @@ def test_add_comment_with_pk_as_int(self):
         first_comment = comments.first()
         self.assertEqual("Hello World!", first_comment.comment)
         self.assertEqual("Hello World!", created_comment['comment'])
+
+
+class TestCaseSortkeysPermissions(APIPermissionsTestCase):
+    permission_label = 'testcases.view_testcase'
+
+    def _fixture_setup(self):
+        super()._fixture_setup()
+
+        self.plan = TestPlanFactory()
+
+        # add TCs with non-standard sortkeys
+        self.case_1 = TestCaseFactory()
+        self.plan.add_case(self.case_1, sortkey=5)
+
+        self.case_2 = TestCaseFactory()
+        self.plan.add_case(self.case_2, sortkey=15)
+
+        self.case_3 = TestCaseFactory()
+        self.plan.add_case(self.case_3, sortkey=25)
+
+    def verify_api_with_permission(self):
+        result = self.rpc_client.TestCase.sortkeys({
+            "plan": self.plan.pk,
+        })
+
+        for entry in result:
+            self.assertEqual(entry['plan_id'], self.plan.pk)
+
+        self.assertEqual(result[0]['case_id'], self.case_1.pk)
+        self.assertEqual(result[0]['sortkey'], 5)
+
+        self.assertEqual(result[1]['case_id'], self.case_2.pk)
+        self.assertEqual(result[1]['sortkey'], 15)
+
+        self.assertEqual(result[2]['case_id'], self.case_3.pk)
+        self.assertEqual(result[2]['sortkey'], 25)
+
+    def verify_api_without_permission(self):
+        with self.assertRaisesRegex(ProtocolError, '403 Forbidden'):
+            self.rpc_client.TestCase.sortkeys({
+                "plan": self.plan.pk,
+            })