diff --git a/src/nbi/service/__main__.py b/src/nbi/service/__main__.py
index 71df0517aa688c106d8d0fe544f5f6b1af5a58f3..1d470f4eac30795e2272c9145baf947f3c982ba5 100644
--- a/src/nbi/service/__main__.py
+++ b/src/nbi/service/__main__.py
@@ -31,6 +31,7 @@ from .rest_server.nbi_plugins.ietf_network_slice import register_ietf_nss
 from .rest_server.nbi_plugins.ietf_acl import register_ietf_acl
 from .rest_server.nbi_plugins.qkd_app import register_qkd_app
 from .rest_server.nbi_plugins.tfs_api import register_tfs_api
+from .rest_server.nbi_plugins import register_restconf
 from .context_subscription import register_context_subscription
 
 terminate = threading.Event()
@@ -79,6 +80,7 @@ def main():
     register_ietf_acl(rest_server)
     register_qkd_app(rest_server)
     register_tfs_api(rest_server)
+    register_restconf(rest_server)
     rest_server.start()
 
     register_context_subscription()
diff --git a/src/nbi/service/rest_server/nbi_plugins/__init__.py b/src/nbi/service/rest_server/nbi_plugins/__init__.py
index e7d5584cd2d19b7393f147a647189da9d01c79a9..9b5d7920db49bab6d456aba186e6500142aad5b2 100644
--- a/src/nbi/service/rest_server/nbi_plugins/__init__.py
+++ b/src/nbi/service/rest_server/nbi_plugins/__init__.py
@@ -34,5 +34,5 @@ def _add_resource(rest_server: RestServer, resource: Resource, *urls, **kwargs):
     rest_server.add_resource(resource, *urls, **kwargs)
 
 
-def register_ietf_nss(rest_server: RestServer):
+def register_restconf(rest_server: RestServer):
     _add_resource(rest_server, BaseServer, "")
diff --git a/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/NSS_Services.py b/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/NSS_Services.py
index 0b4f83fa80739bdf94fdc97de882449251cb8cda..8398917a2c5d8c553efe59551962271d91759e9e 100644
--- a/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/NSS_Services.py
+++ b/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/NSS_Services.py
@@ -22,7 +22,7 @@ from werkzeug.exceptions import UnsupportedMediaType
 from context.client.ContextClient import ContextClient
 from slice.client.SliceClient import SliceClient
 
-from ..tools.HttpStatusCodes import HTTP_CREATED
+from ..tools.HttpStatusCodes import HTTP_CREATED, HTTP_OK
 from .ietf_slice_handler import IETFSliceHandler
 
 LOGGER = logging.getLogger(__name__)
@@ -31,8 +31,10 @@ LOGGER = logging.getLogger(__name__)
 class NSS_Services(Resource):
     # @HTTP_AUTH.login_required
     def get(self):
-        response = jsonify({"message": "All went well!"})
-        # TODO Return list of current network-slice-services
+        context_client = ContextClient()
+        ietf_slices = IETFSliceHandler.get_all_ietf_slices(context_client)
+        response = jsonify(ietf_slices)
+        response.status_code = HTTP_OK
         return response
 
     # @HTTP_AUTH.login_required
diff --git a/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/__init__.py b/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/__init__.py
index 6dcd6c9e9fd01ffb0e4c5c1535e3da37dae2483a..db76b3b911c971df8ab81b1710f4ac80e4ccb3ad 100644
--- a/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/__init__.py
+++ b/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/__init__.py
@@ -28,7 +28,7 @@ from .NSS_Services_Connection_Groups import NSS_Service_Connection_Groups
 from .NSS_Services_SDP import NSS_Service_SDP
 from .NSS_Services_SDPs import NSS_Service_SDPs
 
-URL_PREFIX = "/restconf/data/ietf-network-slice-service:ietf-nss"
+URL_PREFIX = "/restconf/data/ietf-network-slice-service"
 
 
 def _add_resource(rest_server: RestServer, resource: Resource, *urls, **kwargs):
@@ -37,39 +37,39 @@ def _add_resource(rest_server: RestServer, resource: Resource, *urls, **kwargs):
 
 
 def register_ietf_nss(rest_server: RestServer):
-    _add_resource(rest_server, NSS_Services, "/network-slice-services")
+    _add_resource(rest_server, NSS_Services, ":network-slice-services")
     _add_resource(
         rest_server,
         NSS_Service,
-        "/network-slice-services/slice-service=<string:slice_id>",
+        ":network-slice-services/slice-service=<string:slice_id>",
     )
     _add_resource(
         rest_server,
         NSS_Service_SDPs,
-        "/network-slice-services/slice-service=<string:slice_id>/sdps",
+        ":network-slice-services/slice-service=<string:slice_id>/sdps",
     )
     _add_resource(
         rest_server,
         NSS_Service_SDP,
-        "/network-slice-services/slice-service=<string:slice_id>/sdps/sdp=<string:sdp_id>",
+        ":network-slice-services/slice-service=<string:slice_id>/sdps/sdp=<string:sdp_id>",
     )
     _add_resource(
         rest_server,
         NSS_Service_Connection_Groups,
-        "/network-slice-services/slice-service=<string:slice_id>/connection-groups",
+        ":network-slice-services/slice-service=<string:slice_id>/connection-groups",
     )
     _add_resource(
         rest_server,
         NSS_Service_Connection_Group,
-        "/network-slice-services/slice-service=<string:slice_id>/connection-groups/connection-group=<string:connection_group_id>",
+        ":network-slice-services/slice-service=<string:slice_id>/connection-groups/connection-group=<string:connection_group_id>",
     )
     _add_resource(
         rest_server,
         NSS_Service_Match_Criteria,
-        "/network-slice-services/slice-service=<string:slice_id>/sdps/sdp=<string:sdp_id>/service-match-criteria",
+        ":network-slice-services/slice-service=<string:slice_id>/sdps/sdp=<string:sdp_id>/service-match-criteria",
     )
     _add_resource(
         rest_server,
         NSS_Service_Match_Criterion,
-        "/network-slice-services/slice-service=<string:slice_id>/sdps/sdp=<string:sdp_id>/service-match-criteria/match-criterion=<string:match_criterion_id>",
+        ":network-slice-services/slice-service=<string:slice_id>/sdps/sdp=<string:sdp_id>/service-match-criteria/match-criterion=<string:match_criterion_id>",
     )
diff --git a/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/ietf_slice_handler.py b/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/ietf_slice_handler.py
index 6b57cb853a4cda4231e7b2d70f110999da130d14..ee1f215f03dfb095f53d465fabb272b141c5bb01 100644
--- a/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/ietf_slice_handler.py
+++ b/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/ietf_slice_handler.py
@@ -1,7 +1,7 @@
 import json
 import logging
 import uuid
-from typing import Optional
+from typing import Dict, List, Optional
 
 from common.Constants import DEFAULT_CONTEXT_NAME
 from common.proto.context_pb2 import (
@@ -16,7 +16,6 @@ from common.proto.context_pb2 import (
 )
 from common.tools.context_queries.Slice import get_slice_by_defualt_name
 from common.tools.grpc.ConfigRules import update_config_rule_custom
-from common.tools.grpc.Tools import grpc_message_to_json
 from context.client import ContextClient
 
 from .YangValidator import YangValidator
@@ -41,7 +40,7 @@ def get_custom_config_rule(
             return cr
 
 
-def sort_endpoints(endpoinst_list: list, sdps: list, connection_group: dict) -> list:
+def sort_endpoints(endpoinst_list: List, sdps: List, connection_group: Dict) -> List:
     src_sdp_id = connection_group["connectivity-construct"][0]["p2p-sender-sdp"]
     sdp_id_name_mapping = {sdp["id"]: sdp["node-id"] for sdp in sdps}
     if endpoinst_list[0].device_id.device_uuid.uuid == sdp_id_name_mapping[src_sdp_id]:
@@ -50,8 +49,8 @@ def sort_endpoints(endpoinst_list: list, sdps: list, connection_group: dict) ->
 
 
 def replace_ont_endpoint_with_emu_dc(
-    endpoint_list: list, context_client: ContextClient
-) -> list:
+    endpoint_list: List, context_client: ContextClient
+) -> List:
     link_list = context_client.ListLinks(Empty())
     links = list(link_list.links)
     devices_list = context_client.ListDevices(Empty())
@@ -96,13 +95,28 @@ def replace_ont_endpoint_with_emu_dc(
     return endpoint_list
 
 
-def validate_ietf_slice_data(request_data: dict) -> None:
+def validate_ietf_slice_data(request_data: Dict) -> None:
     yang_validator = YangValidator("ietf-network-slice-service")
     _ = yang_validator.parse_to_dict(request_data)
     yang_validator.destroy()
 
 
 class IETFSliceHandler:
+    @staticmethod
+    def get_all_ietf_slices(context_client: ContextClient) -> Dict:
+        slices_list = context_client.ListSlices(Empty())
+        slices = slices_list.slices
+        ietf_slices = {"network-slice-services": {"slice-service": []}}
+        for slice in slices:
+            candidate_cr = get_custom_config_rule(
+                slice.slice_config, CANDIDATE_RESOURCE_KEY
+            )
+            candidate_ietf_data = json.loads(candidate_cr.custom.resource_value)
+            ietf_slices["network-slice-services"]["slice-service"].append(
+                candidate_ietf_data["network-slice-services"]["slice-service"][0]
+            )
+        return ietf_slices
+
     @staticmethod
     def create_slice_service(
         request_data: dict, context_client: ContextClient
diff --git a/src/nbi/tests/data/slice/post_connection_group_to_network_slice2.json b/src/nbi/tests/data/slice/post_connection_group_to_network_slice2.json
new file mode 100644
index 0000000000000000000000000000000000000000..d39a837bd8c3719463e8ecfd3fbfc2d25111afef
--- /dev/null
+++ b/src/nbi/tests/data/slice/post_connection_group_to_network_slice2.json
@@ -0,0 +1,62 @@
+{
+    "connection-group": [
+        {
+            "id": "line2",
+            "connectivity-type": "point-to-point",
+            "connectivity-construct": [
+                {
+                    "id": 1,
+                    "p2p-sender-sdp": "1",
+                    "p2p-receiver-sdp": "3",
+                    "service-slo-sle-policy": {
+                        "slo-policy": {
+                            "metric-bound": [
+                                {
+                                    "metric-type": "ietf-network-slice-service:one-way-delay-maximum",
+                                    "metric-unit": "milliseconds",
+                                    "bound": "10"
+                                },
+                                {
+                                    "metric-type": "ietf-network-slice-service:one-way-bandwidth",
+                                    "metric-unit": "Mbps",
+                                    "bound": "5000"
+                                },
+                                {
+                                    "metric-type": "ietf-network-slice-service:two-way-packet-loss",
+                                    "metric-unit": "percentage",
+                                    "percentile-value": "0.001"
+                                }
+                            ]
+                        }
+                    }
+                },
+                {
+                    "id": 2,
+                    "p2p-sender-sdp": "3",
+                    "p2p-receiver-sdp": "1",
+                    "service-slo-sle-policy": {
+                        "slo-policy": {
+                            "metric-bound": [
+                                {
+                                    "metric-type": "ietf-network-slice-service:one-way-delay-maximum",
+                                    "metric-unit": "milliseconds",
+                                    "bound": "20"
+                                },
+                                {
+                                    "metric-type": "ietf-network-slice-service:one-way-bandwidth",
+                                    "metric-unit": "Mbps",
+                                    "bound": "1000"
+                                },
+                                {
+                                    "metric-type": "ietf-network-slice-service:two-way-packet-loss",
+                                    "metric-unit": "percentage",
+                                    "percentile-value": "0.001"
+                                }
+                            ]
+                        }
+                    }
+                }
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/src/nbi/tests/data/slice/post_match_criteria_to_sdp1_in_slice2.json b/src/nbi/tests/data/slice/post_match_criteria_to_sdp1_in_slice2.json
new file mode 100644
index 0000000000000000000000000000000000000000..8ceefdc2f2471af225143e5a1def2d7ba71e2ab1
--- /dev/null
+++ b/src/nbi/tests/data/slice/post_match_criteria_to_sdp1_in_slice2.json
@@ -0,0 +1,40 @@
+{
+    "match-criterion": [
+        {
+            "index": 2,
+            "match-type": [
+                {
+                    "type": "ietf-network-slice-service:vlan",
+                    "value": [
+                        "201"
+                    ]
+                },
+                {
+                    "type": "ietf-network-slice-service:source-ip-prefix",
+                    "value": [
+                        "172.1.201.22/24"
+                    ]
+                },
+                {
+                    "type": "ietf-network-slice-service:source-tcp-port",
+                    "value": [
+                        "10200"
+                    ]
+                },
+                {
+                    "type": "ietf-network-slice-service:destination-ip-prefix",
+                    "value": [
+                        "172.16.104.222/24"
+                    ]
+                },
+                {
+                    "type": "ietf-network-slice-service:destination-tcp-port",
+                    "value": [
+                        "10500"
+                    ]
+                }
+            ],
+            "target-connection-group-id": "line2"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/src/nbi/tests/data/slice/post_network_slice2.json b/src/nbi/tests/data/slice/post_network_slice2.json
new file mode 100644
index 0000000000000000000000000000000000000000..1445846cc46e925c59064a715dcfb5422e221219
--- /dev/null
+++ b/src/nbi/tests/data/slice/post_network_slice2.json
@@ -0,0 +1,189 @@
+{
+    "slice-service": [
+        {
+            "id": "slice2",
+            "description": "network slice 2, connect to VM2",
+            "sdps": {
+                "sdp": [
+                    {
+                        "id": "1",
+                        "node-id": "172.16.204.220",
+                        "sdp-ip-address": [
+                            "172.16.204.220"
+                        ],
+                        "service-match-criteria": {
+                            "match-criterion": [
+                                {
+                                    "index": 1,
+                                    "match-type": [
+                                        {
+                                            "type": "ietf-network-slice-service:vlan",
+                                            "value": [
+                                                "201"
+                                            ]
+                                        },
+                                        {
+                                            "type": "ietf-network-slice-service:destination-ip-prefix",
+                                            "value": [
+                                                "172.16.104.221/24"
+                                            ]
+                                        },
+                                        {
+                                            "type": "ietf-network-slice-service:destination-tcp-port",
+                                            "value": [
+                                                "10500"
+                                            ]
+                                        },
+                                        {
+                                            "type": "ietf-network-slice-service:source-ip-prefix",
+                                            "value": [
+                                                "172.1.201.22/24"
+                                            ]
+                                        },
+                                        {
+                                            "type": "ietf-network-slice-service:source-tcp-port",
+                                            "value": [
+                                                "10200"
+                                            ]
+                                        }
+                                    ],
+                                    "target-connection-group-id": "line1"
+                                }
+                            ]
+                        },
+                        "attachment-circuits": {
+                            "attachment-circuit": [
+                                {
+                                    "id": "AC POP to VM2",
+                                    "description": "AC VM2 connected to POP",
+                                    "ac-node-id": "172.16.204.220",
+                                    "ac-tp-id": "201"
+                                }
+                            ]
+                        }
+                    },
+                    {
+                        "id": "2",
+                        "node-id": "172.16.61.10",
+                        "sdp-ip-address": [
+                            "172.16.61.10"
+                        ],
+                        "service-match-criteria": {
+                            "match-criterion": [
+                                {
+                                    "index": 1,
+                                    "match-type": [
+                                        {
+                                            "type": "ietf-network-slice-service:vlan",
+                                            "value": [
+                                                "31"
+                                            ]
+                                        },
+                                        {
+                                            "type": "ietf-network-slice-service:source-ip-prefix",
+                                            "value": [
+                                                "172.16.104.221/24"
+                                            ]
+                                        },
+                                        {
+                                            "type": "ietf-network-slice-service:source-tcp-port",
+                                            "value": [
+                                                "10500"
+                                            ]
+                                        },
+                                        {
+                                            "type": "ietf-network-slice-service:destination-ip-prefix",
+                                            "value": [
+                                                "172.1.201.22/24"
+                                            ]
+                                        },
+                                        {
+                                            "type": "ietf-network-slice-service:destination-tcp-port",
+                                            "value": [
+                                                "10200"
+                                            ]
+                                        }
+                                    ],
+                                    "target-connection-group-id": "line1"
+                                }
+                            ]
+                        },
+                        "attachment-circuits": {
+                            "attachment-circuit": [
+                                {
+                                    "id": "AC ONT",
+                                    "description": "AC connected to PC",
+                                    "ac-node-id": "172.16.61.10",
+                                    "ac-tp-id": "200",
+                                    "ac-ipv4-address": "172.16.61.10"
+                                }
+                            ]
+                        }
+                    }
+                ]
+            },
+            "connection-groups": {
+                "connection-group": [
+                    {
+                        "id": "line1",
+                        "connectivity-type": "point-to-point",
+                        "connectivity-construct": [
+                            {
+                                "id": 1,
+                                "p2p-sender-sdp": "1",
+                                "p2p-receiver-sdp": "2",
+                                "service-slo-sle-policy": {
+                                    "slo-policy": {
+                                        "metric-bound": [
+                                            {
+                                                "metric-type": "ietf-network-slice-service:one-way-delay-maximum",
+                                                "metric-unit": "milliseconds",
+                                                "bound": "10"
+                                            },
+                                            {
+                                                "metric-type": "ietf-network-slice-service:one-way-bandwidth",
+                                                "metric-unit": "Mbps",
+                                                "bound": "5000"
+                                            },
+                                            {
+                                                "metric-type": "ietf-network-slice-service:two-way-packet-loss",
+                                                "metric-unit": "percentage",
+                                                "percentile-value": "0.001"
+                                            }
+                                        ]
+                                    }
+                                }
+                            },
+                            {
+                                "id": 2,
+                                "p2mp-sender-sdp": "2",
+                                "p2mp-receiver-sdp": "1",
+                                "service-slo-sle-policy": {
+                                    "slo-policy": {
+                                        "metric-bound": [
+                                            {
+                                                "metric-type": "ietf-network-slice-service:one-way-delay-maximum",
+                                                "metric-unit": "milliseconds",
+                                                "bound": "20"
+                                            },
+                                            {
+                                                "metric-type": "ietf-network-slice-service:one-way-bandwidth",
+                                                "metric-unit": "Mbps",
+                                                "bound": "1000"
+                                            },
+                                            {
+                                                "metric-type": "ietf-network-slice-service:two-way-packet-loss",
+                                                "metric-unit": "percentage",
+                                                "percentile-value": "0.001"
+                                            }
+                                        ]
+                                    }
+                                }
+                            }
+                        ]
+                    }
+                ]
+            }
+        }
+    ]
+}
\ No newline at end of file
diff --git a/src/nbi/tests/data/slice/post_sdp_to_network_slice2.json b/src/nbi/tests/data/slice/post_sdp_to_network_slice2.json
new file mode 100644
index 0000000000000000000000000000000000000000..0b147125bd7eb3efc84c87bebab919639782f760
--- /dev/null
+++ b/src/nbi/tests/data/slice/post_sdp_to_network_slice2.json
@@ -0,0 +1,62 @@
+{
+    "sdp": [
+        {
+            "id": "3",
+            "node-id": "172.16.61.11",
+            "sdp-ip-address": [
+                "172.16.61.11"
+            ],
+            "service-match-criteria": {
+                "match-criterion": [
+                    {
+                        "index": 1,
+                        "match-type": [
+                            {
+                                "type": "ietf-network-slice-service:vlan",
+                                "value": [
+                                    "31"
+                                ]
+                            },
+                            {
+                                "type": "ietf-network-slice-service:source-ip-prefix",
+                                "value": [
+                                    "172.16.104.222/24"
+                                ]
+                            },
+                            {
+                                "type": "ietf-network-slice-service:source-tcp-port",
+                                "value": [
+                                    "10500"
+                                ]
+                            },
+                            {
+                                "type": "ietf-network-slice-service:destination-ip-prefix",
+                                "value": [
+                                    "172.1.201.22/24"
+                                ]
+                            },
+                            {
+                                "type": "ietf-network-slice-service:destination-tcp-port",
+                                "value": [
+                                    "10200"
+                                ]
+                            }
+                        ],
+                        "target-connection-group-id": "line2"
+                    }
+                ]
+            },
+            "attachment-circuits": {
+                "attachment-circuit": [
+                    {
+                        "id": "AC ONT",
+                        "description": "AC connected to PC2",
+                        "ac-node-id": "172.16.61.11",
+                        "ac-tp-id": "200",
+                        "ac-ipv4-address": "172.16.61.11"
+                    }
+                ]
+            }
+        }
+    ]
+}
\ No newline at end of file