diff --git a/go/gosdn/core/core.pb.go b/go/gosdn/core/core.pb.go
index 1ffa1a77ba09c1ed8a552eba6da5e874a125a745..01dee433e54d97e038af932155b01c6a23fc3eef 100644
--- a/go/gosdn/core/core.pb.go
+++ b/go/gosdn/core/core.pb.go
@@ -123,8 +123,8 @@ type GetPndRequest struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Timestamp int64  `protobuf:"varint,1,opt,name=timestamp,proto3" json:"timestamp,omitempty"` // Timestamp in nanoseconds since Epoch.
-	Pid       string `protobuf:"bytes,3,opt,name=pid,proto3" json:"pid,omitempty"`
+	Timestamp int64    `protobuf:"varint,1,opt,name=timestamp,proto3" json:"timestamp,omitempty"` // Timestamp in nanoseconds since Epoch.
+	Pid       []string `protobuf:"bytes,3,rep,name=pid,proto3" json:"pid,omitempty"`
 }
 
 func (x *GetPndRequest) Reset() {
@@ -166,11 +166,11 @@ func (x *GetPndRequest) GetTimestamp() int64 {
 	return 0
 }
 
-func (x *GetPndRequest) GetPid() string {
+func (x *GetPndRequest) GetPid() []string {
 	if x != nil {
 		return x.Pid
 	}
-	return ""
+	return nil
 }
 
 type GetPndListResponse struct {
@@ -581,7 +581,7 @@ var file_gosdn_core_core_proto_rawDesc = []byte{
 	0x50, 0x6e, 0x64, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x1c, 0x0a, 0x09, 0x74, 0x69,
 	0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x18, 0x01, 0x20, 0x01, 0x28, 0x03, 0x52, 0x09, 0x74,
 	0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x12, 0x10, 0x0a, 0x03, 0x70, 0x69, 0x64, 0x18,
-	0x03, 0x20, 0x01, 0x28, 0x09, 0x52, 0x03, 0x70, 0x69, 0x64, 0x22, 0x67, 0x0a, 0x12, 0x47, 0x65,
+	0x03, 0x20, 0x03, 0x28, 0x09, 0x52, 0x03, 0x70, 0x69, 0x64, 0x22, 0x67, 0x0a, 0x12, 0x47, 0x65,
 	0x74, 0x50, 0x6e, 0x64, 0x4c, 0x69, 0x73, 0x74, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65,
 	0x12, 0x1c, 0x0a, 0x09, 0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x18, 0x01, 0x20,
 	0x01, 0x28, 0x03, 0x52, 0x09, 0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x12, 0x33,
diff --git a/go/gosdn/core/core.pb.gw.go b/go/gosdn/core/core.pb.gw.go
index 8c56242b632551449573f8c7e56c895e2fe3c12f..f20b6b3fcf07850e55869757651a55ebdeccda38 100644
--- a/go/gosdn/core/core.pb.gw.go
+++ b/go/gosdn/core/core.pb.gw.go
@@ -51,7 +51,7 @@ func request_CoreService_GetPnd_0(ctx context.Context, marshaler runtime.Marshal
 		return nil, metadata, status.Errorf(codes.InvalidArgument, "missing parameter %s", "pid")
 	}
 
-	protoReq.Pid, err = runtime.String(val)
+	protoReq.Pid, err = runtime.StringSlice(val, ",")
 	if err != nil {
 		return nil, metadata, status.Errorf(codes.InvalidArgument, "type mismatch, parameter: %s, error: %v", "pid", err)
 	}
@@ -84,7 +84,7 @@ func local_request_CoreService_GetPnd_0(ctx context.Context, marshaler runtime.M
 		return nil, metadata, status.Errorf(codes.InvalidArgument, "missing parameter %s", "pid")
 	}
 
-	protoReq.Pid, err = runtime.String(val)
+	protoReq.Pid, err = runtime.StringSlice(val, ",")
 	if err != nil {
 		return nil, metadata, status.Errorf(codes.InvalidArgument, "type mismatch, parameter: %s, error: %v", "pid", err)
 	}
diff --git a/go/gosdn/pnd/pnd.pb.go b/go/gosdn/pnd/pnd.pb.go
index a22332fae58da9c5c7dc3d3617476b2aedd39554..748b56d9770c2e28002182f87f874ec6e4b0566c 100644
--- a/go/gosdn/pnd/pnd.pb.go
+++ b/go/gosdn/pnd/pnd.pb.go
@@ -294,9 +294,9 @@ type GetOndRequest struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Timestamp int64  `protobuf:"varint,1,opt,name=timestamp,proto3" json:"timestamp,omitempty"` // Timestamp in nanoseconds since Epoch.
-	Did       string `protobuf:"bytes,3,opt,name=did,proto3" json:"did,omitempty"`
-	Pid       string `protobuf:"bytes,4,opt,name=pid,proto3" json:"pid,omitempty"`
+	Timestamp int64    `protobuf:"varint,1,opt,name=timestamp,proto3" json:"timestamp,omitempty"` // Timestamp in nanoseconds since Epoch.
+	Did       []string `protobuf:"bytes,3,rep,name=did,proto3" json:"did,omitempty"`
+	Pid       string   `protobuf:"bytes,4,opt,name=pid,proto3" json:"pid,omitempty"`
 }
 
 func (x *GetOndRequest) Reset() {
@@ -338,11 +338,11 @@ func (x *GetOndRequest) GetTimestamp() int64 {
 	return 0
 }
 
-func (x *GetOndRequest) GetDid() string {
+func (x *GetOndRequest) GetDid() []string {
 	if x != nil {
 		return x.Did
 	}
-	return ""
+	return nil
 }
 
 func (x *GetOndRequest) GetPid() string {
@@ -2306,7 +2306,7 @@ var file_gosdn_pnd_pnd_proto_rawDesc = []byte{
 	0x65, 0x74, 0x4f, 0x6e, 0x64, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x1c, 0x0a, 0x09,
 	0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x18, 0x01, 0x20, 0x01, 0x28, 0x03, 0x52,
 	0x09, 0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x12, 0x10, 0x0a, 0x03, 0x64, 0x69,
-	0x64, 0x18, 0x03, 0x20, 0x01, 0x28, 0x09, 0x52, 0x03, 0x64, 0x69, 0x64, 0x12, 0x10, 0x0a, 0x03,
+	0x64, 0x18, 0x03, 0x20, 0x03, 0x28, 0x09, 0x52, 0x03, 0x64, 0x69, 0x64, 0x12, 0x10, 0x0a, 0x03,
 	0x70, 0x69, 0x64, 0x18, 0x04, 0x20, 0x01, 0x28, 0x09, 0x52, 0x03, 0x70, 0x69, 0x64, 0x22, 0x43,
 	0x0a, 0x11, 0x47, 0x65, 0x74, 0x53, 0x62, 0x69, 0x4c, 0x69, 0x73, 0x74, 0x52, 0x65, 0x71, 0x75,
 	0x65, 0x73, 0x74, 0x12, 0x1c, 0x0a, 0x09, 0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70,
diff --git a/go/gosdn/pnd/pnd.pb.gw.go b/go/gosdn/pnd/pnd.pb.gw.go
index 352d623cc1e492cbc73ed6609724ce297249b7cb..05cade791536aafaa08fdfcbabbc458cedeb446c 100644
--- a/go/gosdn/pnd/pnd.pb.gw.go
+++ b/go/gosdn/pnd/pnd.pb.gw.go
@@ -131,7 +131,7 @@ func request_PndService_GetOnd_0(ctx context.Context, marshaler runtime.Marshale
 		return nil, metadata, status.Errorf(codes.InvalidArgument, "missing parameter %s", "did")
 	}
 
-	protoReq.Did, err = runtime.String(val)
+	protoReq.Did, err = runtime.StringSlice(val, ",")
 	if err != nil {
 		return nil, metadata, status.Errorf(codes.InvalidArgument, "type mismatch, parameter: %s, error: %v", "did", err)
 	}
@@ -174,7 +174,7 @@ func local_request_PndService_GetOnd_0(ctx context.Context, marshaler runtime.Ma
 		return nil, metadata, status.Errorf(codes.InvalidArgument, "missing parameter %s", "did")
 	}
 
-	protoReq.Did, err = runtime.String(val)
+	protoReq.Did, err = runtime.StringSlice(val, ",")
 	if err != nil {
 		return nil, metadata, status.Errorf(codes.InvalidArgument, "type mismatch, parameter: %s, error: %v", "did", err)
 	}
diff --git a/openapiv2/gosdn_northbound.swagger.json b/openapiv2/gosdn_northbound.swagger.json
index e1e377688728c91033ad92ec981af4d3ccffe801..0ac935cd8bc5dca8d591efcaaf29fc9feb925eb3 100644
--- a/openapiv2/gosdn_northbound.swagger.json
+++ b/openapiv2/gosdn_northbound.swagger.json
@@ -17,9 +17,6 @@
     {
       "name": "PndService"
     },
-    {
-      "name": "Collector"
-    },
     {
       "name": "gNMI"
     },
@@ -27,10 +24,13 @@
       "name": "CsbiService"
     },
     {
-      "name": "AgentManager"
+      "name": "CoreService"
     },
     {
-      "name": "CoreService"
+      "name": "Collector"
+    },
+    {
+      "name": "AgentManager"
     }
   ],
   "consumes": [
@@ -63,7 +63,12 @@
             "name": "pid",
             "in": "path",
             "required": true,
-            "type": "string"
+            "type": "array",
+            "items": {
+              "type": "string"
+            },
+            "collectionFormat": "csv",
+            "minItems": 1
           },
           {
             "name": "timestamp",
@@ -339,7 +344,12 @@
             "name": "did",
             "in": "path",
             "required": true,
-            "type": "string"
+            "type": "array",
+            "items": {
+              "type": "string"
+            },
+            "collectionFormat": "csv",
+            "minItems": 1
           },
           {
             "name": "timestamp",
diff --git a/proto/gosdn/core/core.proto b/proto/gosdn/core/core.proto
index 0a63a27fdd986ead6ba585ddac8311226f9e5a7e..affbac00af644aa6a75dc5fcc9ff72ef386ea0f6 100644
--- a/proto/gosdn/core/core.proto
+++ b/proto/gosdn/core/core.proto
@@ -41,7 +41,7 @@ message GetPndListRequest {
 
 message GetPndRequest {
   int64 timestamp = 1;          // Timestamp in nanoseconds since Epoch.
-  string pid = 3;
+  repeated string pid = 3;
 }
 
 message GetPndListResponse {
diff --git a/proto/gosdn/pnd/pnd.proto b/proto/gosdn/pnd/pnd.proto
index 41d4cbac2a6384a52d11b485f5a5e2ba93f2dfbf..6aa9bf9ee4e9671e3d638ea78208cf1b0739c9da 100644
--- a/proto/gosdn/pnd/pnd.proto
+++ b/proto/gosdn/pnd/pnd.proto
@@ -124,7 +124,7 @@ message GetOndListRequest {
 
 message GetOndRequest {
   int64 timestamp = 1;          // Timestamp in nanoseconds since Epoch.
-  string did = 3;
+  repeated string did = 3;
   string pid = 4;
 }