diff --git a/backend/mpc-system/api/grpc/coordinator/v1/session_coordinator.pb.go b/backend/mpc-system/api/grpc/coordinator/v1/session_coordinator.pb.go
index 3f9cb698..3dd3eeec 100644
--- a/backend/mpc-system/api/grpc/coordinator/v1/session_coordinator.pb.go
+++ b/backend/mpc-system/api/grpc/coordinator/v1/session_coordinator.pb.go
@@ -2,7 +2,7 @@
 // versions:
 // 	protoc-gen-go v1.36.10
 // 	protoc        v6.33.1
-// source: api/proto/session_coordinator.proto
+// source: session_coordinator.proto
 
 package coordinator
 
@@ -44,7 +44,7 @@ type CreateSessionRequest struct {
 
 func (x *CreateSessionRequest) Reset() {
 	*x = CreateSessionRequest{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[0]
+	mi := &file_session_coordinator_proto_msgTypes[0]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -56,7 +56,7 @@ func (x *CreateSessionRequest) String() string {
 func (*CreateSessionRequest) ProtoMessage() {}
 
 func (x *CreateSessionRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[0]
+	mi := &file_session_coordinator_proto_msgTypes[0]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -69,7 +69,7 @@ func (x *CreateSessionRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CreateSessionRequest.ProtoReflect.Descriptor instead.
 func (*CreateSessionRequest) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{0}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{0}
 }
 
 func (x *CreateSessionRequest) GetSessionType() string {
@@ -161,7 +161,7 @@ type DelegateUserShare struct {
 
 func (x *DelegateUserShare) Reset() {
 	*x = DelegateUserShare{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[1]
+	mi := &file_session_coordinator_proto_msgTypes[1]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -173,7 +173,7 @@ func (x *DelegateUserShare) String() string {
 func (*DelegateUserShare) ProtoMessage() {}
 
 func (x *DelegateUserShare) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[1]
+	mi := &file_session_coordinator_proto_msgTypes[1]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -186,7 +186,7 @@ func (x *DelegateUserShare) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DelegateUserShare.ProtoReflect.Descriptor instead.
 func (*DelegateUserShare) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{1}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{1}
 }
 
 func (x *DelegateUserShare) GetDelegatePartyId() string {
@@ -222,7 +222,7 @@ type PartyComposition struct {
 
 func (x *PartyComposition) Reset() {
 	*x = PartyComposition{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[2]
+	mi := &file_session_coordinator_proto_msgTypes[2]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -234,7 +234,7 @@ func (x *PartyComposition) String() string {
 func (*PartyComposition) ProtoMessage() {}
 
 func (x *PartyComposition) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[2]
+	mi := &file_session_coordinator_proto_msgTypes[2]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -247,7 +247,7 @@ func (x *PartyComposition) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PartyComposition.ProtoReflect.Descriptor instead.
 func (*PartyComposition) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{2}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{2}
 }
 
 func (x *PartyComposition) GetPersistentCount() int32 {
@@ -283,7 +283,7 @@ type ParticipantInfo struct {
 
 func (x *ParticipantInfo) Reset() {
 	*x = ParticipantInfo{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[3]
+	mi := &file_session_coordinator_proto_msgTypes[3]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -295,7 +295,7 @@ func (x *ParticipantInfo) String() string {
 func (*ParticipantInfo) ProtoMessage() {}
 
 func (x *ParticipantInfo) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[3]
+	mi := &file_session_coordinator_proto_msgTypes[3]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -308,7 +308,7 @@ func (x *ParticipantInfo) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ParticipantInfo.ProtoReflect.Descriptor instead.
 func (*ParticipantInfo) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{3}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *ParticipantInfo) GetPartyId() string {
@@ -345,7 +345,7 @@ type DeviceInfo struct {
 
 func (x *DeviceInfo) Reset() {
 	*x = DeviceInfo{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[4]
+	mi := &file_session_coordinator_proto_msgTypes[4]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -357,7 +357,7 @@ func (x *DeviceInfo) String() string {
 func (*DeviceInfo) ProtoMessage() {}
 
 func (x *DeviceInfo) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[4]
+	mi := &file_session_coordinator_proto_msgTypes[4]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -370,7 +370,7 @@ func (x *DeviceInfo) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DeviceInfo.ProtoReflect.Descriptor instead.
 func (*DeviceInfo) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{4}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *DeviceInfo) GetDeviceType() string {
@@ -415,7 +415,7 @@ type CreateSessionResponse struct {
 
 func (x *CreateSessionResponse) Reset() {
 	*x = CreateSessionResponse{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[5]
+	mi := &file_session_coordinator_proto_msgTypes[5]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -427,7 +427,7 @@ func (x *CreateSessionResponse) String() string {
 func (*CreateSessionResponse) ProtoMessage() {}
 
 func (x *CreateSessionResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[5]
+	mi := &file_session_coordinator_proto_msgTypes[5]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -440,7 +440,7 @@ func (x *CreateSessionResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CreateSessionResponse.ProtoReflect.Descriptor instead.
 func (*CreateSessionResponse) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{5}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *CreateSessionResponse) GetSessionId() string {
@@ -491,7 +491,7 @@ type JoinSessionRequest struct {
 
 func (x *JoinSessionRequest) Reset() {
 	*x = JoinSessionRequest{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[6]
+	mi := &file_session_coordinator_proto_msgTypes[6]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -503,7 +503,7 @@ func (x *JoinSessionRequest) String() string {
 func (*JoinSessionRequest) ProtoMessage() {}
 
 func (x *JoinSessionRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[6]
+	mi := &file_session_coordinator_proto_msgTypes[6]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -516,7 +516,7 @@ func (x *JoinSessionRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use JoinSessionRequest.ProtoReflect.Descriptor instead.
 func (*JoinSessionRequest) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{6}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *JoinSessionRequest) GetSessionId() string {
@@ -560,7 +560,7 @@ type JoinSessionResponse struct {
 
 func (x *JoinSessionResponse) Reset() {
 	*x = JoinSessionResponse{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[7]
+	mi := &file_session_coordinator_proto_msgTypes[7]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -572,7 +572,7 @@ func (x *JoinSessionResponse) String() string {
 func (*JoinSessionResponse) ProtoMessage() {}
 
 func (x *JoinSessionResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[7]
+	mi := &file_session_coordinator_proto_msgTypes[7]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -585,7 +585,7 @@ func (x *JoinSessionResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use JoinSessionResponse.ProtoReflect.Descriptor instead.
 func (*JoinSessionResponse) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{7}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *JoinSessionResponse) GetSuccess() bool {
@@ -636,7 +636,7 @@ type SessionInfo struct {
 
 func (x *SessionInfo) Reset() {
 	*x = SessionInfo{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[8]
+	mi := &file_session_coordinator_proto_msgTypes[8]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -648,7 +648,7 @@ func (x *SessionInfo) String() string {
 func (*SessionInfo) ProtoMessage() {}
 
 func (x *SessionInfo) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[8]
+	mi := &file_session_coordinator_proto_msgTypes[8]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -661,7 +661,7 @@ func (x *SessionInfo) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SessionInfo.ProtoReflect.Descriptor instead.
 func (*SessionInfo) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{8}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *SessionInfo) GetSessionId() string {
@@ -739,7 +739,7 @@ type PartyInfo struct {
 
 func (x *PartyInfo) Reset() {
 	*x = PartyInfo{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[9]
+	mi := &file_session_coordinator_proto_msgTypes[9]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -751,7 +751,7 @@ func (x *PartyInfo) String() string {
 func (*PartyInfo) ProtoMessage() {}
 
 func (x *PartyInfo) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[9]
+	mi := &file_session_coordinator_proto_msgTypes[9]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -764,7 +764,7 @@ func (x *PartyInfo) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PartyInfo.ProtoReflect.Descriptor instead.
 func (*PartyInfo) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{9}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{9}
 }
 
 func (x *PartyInfo) GetPartyId() string {
@@ -798,7 +798,7 @@ type GetSessionStatusRequest struct {
 
 func (x *GetSessionStatusRequest) Reset() {
 	*x = GetSessionStatusRequest{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[10]
+	mi := &file_session_coordinator_proto_msgTypes[10]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -810,7 +810,7 @@ func (x *GetSessionStatusRequest) String() string {
 func (*GetSessionStatusRequest) ProtoMessage() {}
 
 func (x *GetSessionStatusRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[10]
+	mi := &file_session_coordinator_proto_msgTypes[10]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -823,7 +823,7 @@ func (x *GetSessionStatusRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GetSessionStatusRequest.ProtoReflect.Descriptor instead.
 func (*GetSessionStatusRequest) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{10}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{10}
 }
 
 func (x *GetSessionStatusRequest) GetSessionId() string {
@@ -848,13 +848,16 @@ type GetSessionStatusResponse struct {
 	// Delegate share info (returned when keygen session completed and delegate party submitted share)
 	// Only populated if session_type="keygen" AND has_delegate=true AND session is completed
 	DelegateShare *DelegateShareInfo `protobuf:"bytes,8,opt,name=delegate_share,json=delegateShare,proto3" json:"delegate_share,omitempty"`
+	// participants contains detailed participant information including party_index
+	// Used by service-party-app for co_managed_keygen sessions
+	Participants  []*ParticipantStatus `protobuf:"bytes,9,rep,name=participants,proto3" json:"participants,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
 
 func (x *GetSessionStatusResponse) Reset() {
 	*x = GetSessionStatusResponse{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[11]
+	mi := &file_session_coordinator_proto_msgTypes[11]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -866,7 +869,7 @@ func (x *GetSessionStatusResponse) String() string {
 func (*GetSessionStatusResponse) ProtoMessage() {}
 
 func (x *GetSessionStatusResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[11]
+	mi := &file_session_coordinator_proto_msgTypes[11]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -879,7 +882,7 @@ func (x *GetSessionStatusResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GetSessionStatusResponse.ProtoReflect.Descriptor instead.
 func (*GetSessionStatusResponse) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{11}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{11}
 }
 
 func (x *GetSessionStatusResponse) GetStatus() string {
@@ -938,6 +941,74 @@ func (x *GetSessionStatusResponse) GetDelegateShare() *DelegateShareInfo {
 	return nil
 }
 
+func (x *GetSessionStatusResponse) GetParticipants() []*ParticipantStatus {
+	if x != nil {
+		return x.Participants
+	}
+	return nil
+}
+
+// ParticipantStatus contains participant status information
+type ParticipantStatus struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	PartyId       string                 `protobuf:"bytes,1,opt,name=party_id,json=partyId,proto3" json:"party_id,omitempty"`
+	PartyIndex    int32                  `protobuf:"varint,2,opt,name=party_index,json=partyIndex,proto3" json:"party_index,omitempty"`
+	Status        string                 `protobuf:"bytes,3,opt,name=status,proto3" json:"status,omitempty"` // pending, joined, ready, completed
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ParticipantStatus) Reset() {
+	*x = ParticipantStatus{}
+	mi := &file_session_coordinator_proto_msgTypes[12]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ParticipantStatus) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ParticipantStatus) ProtoMessage() {}
+
+func (x *ParticipantStatus) ProtoReflect() protoreflect.Message {
+	mi := &file_session_coordinator_proto_msgTypes[12]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ParticipantStatus.ProtoReflect.Descriptor instead.
+func (*ParticipantStatus) Descriptor() ([]byte, []int) {
+	return file_session_coordinator_proto_rawDescGZIP(), []int{12}
+}
+
+func (x *ParticipantStatus) GetPartyId() string {
+	if x != nil {
+		return x.PartyId
+	}
+	return ""
+}
+
+func (x *ParticipantStatus) GetPartyIndex() int32 {
+	if x != nil {
+		return x.PartyIndex
+	}
+	return 0
+}
+
+func (x *ParticipantStatus) GetStatus() string {
+	if x != nil {
+		return x.Status
+	}
+	return ""
+}
+
 // DelegateShareInfo contains the delegate party's share for user
 type DelegateShareInfo struct {
 	state          protoimpl.MessageState `protogen:"open.v1"`
@@ -950,7 +1021,7 @@ type DelegateShareInfo struct {
 
 func (x *DelegateShareInfo) Reset() {
 	*x = DelegateShareInfo{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[12]
+	mi := &file_session_coordinator_proto_msgTypes[13]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -962,7 +1033,7 @@ func (x *DelegateShareInfo) String() string {
 func (*DelegateShareInfo) ProtoMessage() {}
 
 func (x *DelegateShareInfo) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[12]
+	mi := &file_session_coordinator_proto_msgTypes[13]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -975,7 +1046,7 @@ func (x *DelegateShareInfo) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DelegateShareInfo.ProtoReflect.Descriptor instead.
 func (*DelegateShareInfo) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{12}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{13}
 }
 
 func (x *DelegateShareInfo) GetEncryptedShare() []byte {
@@ -1012,7 +1083,7 @@ type ReportCompletionRequest struct {
 
 func (x *ReportCompletionRequest) Reset() {
 	*x = ReportCompletionRequest{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[13]
+	mi := &file_session_coordinator_proto_msgTypes[14]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1024,7 +1095,7 @@ func (x *ReportCompletionRequest) String() string {
 func (*ReportCompletionRequest) ProtoMessage() {}
 
 func (x *ReportCompletionRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[13]
+	mi := &file_session_coordinator_proto_msgTypes[14]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1037,7 +1108,7 @@ func (x *ReportCompletionRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReportCompletionRequest.ProtoReflect.Descriptor instead.
 func (*ReportCompletionRequest) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{13}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{14}
 }
 
 func (x *ReportCompletionRequest) GetSessionId() string {
@@ -1079,7 +1150,7 @@ type ReportCompletionResponse struct {
 
 func (x *ReportCompletionResponse) Reset() {
 	*x = ReportCompletionResponse{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[14]
+	mi := &file_session_coordinator_proto_msgTypes[15]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1091,7 +1162,7 @@ func (x *ReportCompletionResponse) String() string {
 func (*ReportCompletionResponse) ProtoMessage() {}
 
 func (x *ReportCompletionResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[14]
+	mi := &file_session_coordinator_proto_msgTypes[15]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1104,7 +1175,7 @@ func (x *ReportCompletionResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReportCompletionResponse.ProtoReflect.Descriptor instead.
 func (*ReportCompletionResponse) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{14}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{15}
 }
 
 func (x *ReportCompletionResponse) GetSuccess() bool {
@@ -1131,7 +1202,7 @@ type CloseSessionRequest struct {
 
 func (x *CloseSessionRequest) Reset() {
 	*x = CloseSessionRequest{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[15]
+	mi := &file_session_coordinator_proto_msgTypes[16]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1143,7 +1214,7 @@ func (x *CloseSessionRequest) String() string {
 func (*CloseSessionRequest) ProtoMessage() {}
 
 func (x *CloseSessionRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[15]
+	mi := &file_session_coordinator_proto_msgTypes[16]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1156,7 +1227,7 @@ func (x *CloseSessionRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CloseSessionRequest.ProtoReflect.Descriptor instead.
 func (*CloseSessionRequest) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{15}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{16}
 }
 
 func (x *CloseSessionRequest) GetSessionId() string {
@@ -1176,7 +1247,7 @@ type CloseSessionResponse struct {
 
 func (x *CloseSessionResponse) Reset() {
 	*x = CloseSessionResponse{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[16]
+	mi := &file_session_coordinator_proto_msgTypes[17]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1188,7 +1259,7 @@ func (x *CloseSessionResponse) String() string {
 func (*CloseSessionResponse) ProtoMessage() {}
 
 func (x *CloseSessionResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[16]
+	mi := &file_session_coordinator_proto_msgTypes[17]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1201,7 +1272,7 @@ func (x *CloseSessionResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CloseSessionResponse.ProtoReflect.Descriptor instead.
 func (*CloseSessionResponse) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{16}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{17}
 }
 
 func (x *CloseSessionResponse) GetSuccess() bool {
@@ -1222,7 +1293,7 @@ type MarkPartyReadyRequest struct {
 
 func (x *MarkPartyReadyRequest) Reset() {
 	*x = MarkPartyReadyRequest{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[17]
+	mi := &file_session_coordinator_proto_msgTypes[18]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1234,7 +1305,7 @@ func (x *MarkPartyReadyRequest) String() string {
 func (*MarkPartyReadyRequest) ProtoMessage() {}
 
 func (x *MarkPartyReadyRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[17]
+	mi := &file_session_coordinator_proto_msgTypes[18]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1247,7 +1318,7 @@ func (x *MarkPartyReadyRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MarkPartyReadyRequest.ProtoReflect.Descriptor instead.
 func (*MarkPartyReadyRequest) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{17}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{18}
 }
 
 func (x *MarkPartyReadyRequest) GetSessionId() string {
@@ -1277,7 +1348,7 @@ type MarkPartyReadyResponse struct {
 
 func (x *MarkPartyReadyResponse) Reset() {
 	*x = MarkPartyReadyResponse{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[18]
+	mi := &file_session_coordinator_proto_msgTypes[19]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1289,7 +1360,7 @@ func (x *MarkPartyReadyResponse) String() string {
 func (*MarkPartyReadyResponse) ProtoMessage() {}
 
 func (x *MarkPartyReadyResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[18]
+	mi := &file_session_coordinator_proto_msgTypes[19]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1302,7 +1373,7 @@ func (x *MarkPartyReadyResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MarkPartyReadyResponse.ProtoReflect.Descriptor instead.
 func (*MarkPartyReadyResponse) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{18}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{19}
 }
 
 func (x *MarkPartyReadyResponse) GetSuccess() bool {
@@ -1343,7 +1414,7 @@ type StartSessionRequest struct {
 
 func (x *StartSessionRequest) Reset() {
 	*x = StartSessionRequest{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[19]
+	mi := &file_session_coordinator_proto_msgTypes[20]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1355,7 +1426,7 @@ func (x *StartSessionRequest) String() string {
 func (*StartSessionRequest) ProtoMessage() {}
 
 func (x *StartSessionRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[19]
+	mi := &file_session_coordinator_proto_msgTypes[20]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1368,7 +1439,7 @@ func (x *StartSessionRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use StartSessionRequest.ProtoReflect.Descriptor instead.
 func (*StartSessionRequest) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{19}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{20}
 }
 
 func (x *StartSessionRequest) GetSessionId() string {
@@ -1389,7 +1460,7 @@ type StartSessionResponse struct {
 
 func (x *StartSessionResponse) Reset() {
 	*x = StartSessionResponse{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[20]
+	mi := &file_session_coordinator_proto_msgTypes[21]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1401,7 +1472,7 @@ func (x *StartSessionResponse) String() string {
 func (*StartSessionResponse) ProtoMessage() {}
 
 func (x *StartSessionResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[20]
+	mi := &file_session_coordinator_proto_msgTypes[21]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1414,7 +1485,7 @@ func (x *StartSessionResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use StartSessionResponse.ProtoReflect.Descriptor instead.
 func (*StartSessionResponse) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{20}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{21}
 }
 
 func (x *StartSessionResponse) GetSuccess() bool {
@@ -1445,7 +1516,7 @@ type SubmitDelegateShareRequest struct {
 
 func (x *SubmitDelegateShareRequest) Reset() {
 	*x = SubmitDelegateShareRequest{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[21]
+	mi := &file_session_coordinator_proto_msgTypes[22]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1457,7 +1528,7 @@ func (x *SubmitDelegateShareRequest) String() string {
 func (*SubmitDelegateShareRequest) ProtoMessage() {}
 
 func (x *SubmitDelegateShareRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[21]
+	mi := &file_session_coordinator_proto_msgTypes[22]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1470,7 +1541,7 @@ func (x *SubmitDelegateShareRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubmitDelegateShareRequest.ProtoReflect.Descriptor instead.
 func (*SubmitDelegateShareRequest) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{21}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{22}
 }
 
 func (x *SubmitDelegateShareRequest) GetSessionId() string {
@@ -1518,7 +1589,7 @@ type SubmitDelegateShareResponse struct {
 
 func (x *SubmitDelegateShareResponse) Reset() {
 	*x = SubmitDelegateShareResponse{}
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[22]
+	mi := &file_session_coordinator_proto_msgTypes[23]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1530,7 +1601,7 @@ func (x *SubmitDelegateShareResponse) String() string {
 func (*SubmitDelegateShareResponse) ProtoMessage() {}
 
 func (x *SubmitDelegateShareResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_api_proto_session_coordinator_proto_msgTypes[22]
+	mi := &file_session_coordinator_proto_msgTypes[23]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1543,7 +1614,7 @@ func (x *SubmitDelegateShareResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubmitDelegateShareResponse.ProtoReflect.Descriptor instead.
 func (*SubmitDelegateShareResponse) Descriptor() ([]byte, []int) {
-	return file_api_proto_session_coordinator_proto_rawDescGZIP(), []int{22}
+	return file_session_coordinator_proto_rawDescGZIP(), []int{23}
 }
 
 func (x *SubmitDelegateShareResponse) GetSuccess() bool {
@@ -1553,11 +1624,11 @@ func (x *SubmitDelegateShareResponse) GetSuccess() bool {
 	return false
 }
 
-var File_api_proto_session_coordinator_proto protoreflect.FileDescriptor
+var File_session_coordinator_proto protoreflect.FileDescriptor
 
-const file_api_proto_session_coordinator_proto_rawDesc = "" +
+const file_session_coordinator_proto_rawDesc = "" +
 	"\n" +
-	"#api/proto/session_coordinator.proto\x12\x12mpc.coordinator.v1\"\xad\x04\n" +
+	"\x19session_coordinator.proto\x12\x12mpc.coordinator.v1\"\xad\x04\n" +
 	"\x14CreateSessionRequest\x12!\n" +
 	"\fsession_type\x18\x01 \x01(\tR\vsessionType\x12\x1f\n" +
 	"\vthreshold_n\x18\x02 \x01(\x05R\n" +
@@ -1647,7 +1718,7 @@ const file_api_proto_session_coordinator_proto_rawDesc = "" +
 	"deviceInfo\"8\n" +
 	"\x17GetSessionStatusRequest\x12\x1d\n" +
 	"\n" +
-	"session_id\x18\x01 \x01(\tR\tsessionId\"\xd5\x02\n" +
+	"session_id\x18\x01 \x01(\tR\tsessionId\"\xa0\x03\n" +
 	"\x18GetSessionStatusResponse\x12\x16\n" +
 	"\x06status\x18\x01 \x01(\tR\x06status\x12+\n" +
 	"\x11completed_parties\x18\x02 \x01(\x05R\x10completedParties\x12#\n" +
@@ -1657,7 +1728,13 @@ const file_api_proto_session_coordinator_proto_rawDesc = "" +
 	"public_key\x18\x05 \x01(\fR\tpublicKey\x12\x1c\n" +
 	"\tsignature\x18\x06 \x01(\fR\tsignature\x12!\n" +
 	"\fhas_delegate\x18\a \x01(\bR\vhasDelegate\x12L\n" +
-	"\x0edelegate_share\x18\b \x01(\v2%.mpc.coordinator.v1.DelegateShareInfoR\rdelegateShare\"x\n" +
+	"\x0edelegate_share\x18\b \x01(\v2%.mpc.coordinator.v1.DelegateShareInfoR\rdelegateShare\x12I\n" +
+	"\fparticipants\x18\t \x03(\v2%.mpc.coordinator.v1.ParticipantStatusR\fparticipants\"g\n" +
+	"\x11ParticipantStatus\x12\x19\n" +
+	"\bparty_id\x18\x01 \x01(\tR\apartyId\x12\x1f\n" +
+	"\vparty_index\x18\x02 \x01(\x05R\n" +
+	"partyIndex\x12\x16\n" +
+	"\x06status\x18\x03 \x01(\tR\x06status\"x\n" +
 	"\x11DelegateShareInfo\x12'\n" +
 	"\x0fencrypted_share\x18\x01 \x01(\fR\x0eencryptedShare\x12\x1f\n" +
 	"\vparty_index\x18\x02 \x01(\x05R\n" +
@@ -1716,19 +1793,19 @@ const file_api_proto_session_coordinator_proto_rawDesc = "" +
 	"\x13SubmitDelegateShare\x12..mpc.coordinator.v1.SubmitDelegateShareRequest\x1a/.mpc.coordinator.v1.SubmitDelegateShareResponseBEZCgithub.com/rwadurian/mpc-system/api/grpc/coordinator/v1;coordinatorb\x06proto3"
 
 var (
-	file_api_proto_session_coordinator_proto_rawDescOnce sync.Once
-	file_api_proto_session_coordinator_proto_rawDescData []byte
+	file_session_coordinator_proto_rawDescOnce sync.Once
+	file_session_coordinator_proto_rawDescData []byte
 )
 
-func file_api_proto_session_coordinator_proto_rawDescGZIP() []byte {
-	file_api_proto_session_coordinator_proto_rawDescOnce.Do(func() {
-		file_api_proto_session_coordinator_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_api_proto_session_coordinator_proto_rawDesc), len(file_api_proto_session_coordinator_proto_rawDesc)))
+func file_session_coordinator_proto_rawDescGZIP() []byte {
+	file_session_coordinator_proto_rawDescOnce.Do(func() {
+		file_session_coordinator_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_session_coordinator_proto_rawDesc), len(file_session_coordinator_proto_rawDesc)))
 	})
-	return file_api_proto_session_coordinator_proto_rawDescData
+	return file_session_coordinator_proto_rawDescData
 }
 
-var file_api_proto_session_coordinator_proto_msgTypes = make([]protoimpl.MessageInfo, 24)
-var file_api_proto_session_coordinator_proto_goTypes = []any{
+var file_session_coordinator_proto_msgTypes = make([]protoimpl.MessageInfo, 25)
+var file_session_coordinator_proto_goTypes = []any{
 	(*CreateSessionRequest)(nil),        // 0: mpc.coordinator.v1.CreateSessionRequest
 	(*DelegateUserShare)(nil),           // 1: mpc.coordinator.v1.DelegateUserShare
 	(*PartyComposition)(nil),            // 2: mpc.coordinator.v1.PartyComposition
@@ -1741,73 +1818,75 @@ var file_api_proto_session_coordinator_proto_goTypes = []any{
 	(*PartyInfo)(nil),                   // 9: mpc.coordinator.v1.PartyInfo
 	(*GetSessionStatusRequest)(nil),     // 10: mpc.coordinator.v1.GetSessionStatusRequest
 	(*GetSessionStatusResponse)(nil),    // 11: mpc.coordinator.v1.GetSessionStatusResponse
-	(*DelegateShareInfo)(nil),           // 12: mpc.coordinator.v1.DelegateShareInfo
-	(*ReportCompletionRequest)(nil),     // 13: mpc.coordinator.v1.ReportCompletionRequest
-	(*ReportCompletionResponse)(nil),    // 14: mpc.coordinator.v1.ReportCompletionResponse
-	(*CloseSessionRequest)(nil),         // 15: mpc.coordinator.v1.CloseSessionRequest
-	(*CloseSessionResponse)(nil),        // 16: mpc.coordinator.v1.CloseSessionResponse
-	(*MarkPartyReadyRequest)(nil),       // 17: mpc.coordinator.v1.MarkPartyReadyRequest
-	(*MarkPartyReadyResponse)(nil),      // 18: mpc.coordinator.v1.MarkPartyReadyResponse
-	(*StartSessionRequest)(nil),         // 19: mpc.coordinator.v1.StartSessionRequest
-	(*StartSessionResponse)(nil),        // 20: mpc.coordinator.v1.StartSessionResponse
-	(*SubmitDelegateShareRequest)(nil),  // 21: mpc.coordinator.v1.SubmitDelegateShareRequest
-	(*SubmitDelegateShareResponse)(nil), // 22: mpc.coordinator.v1.SubmitDelegateShareResponse
-	nil,                                 // 23: mpc.coordinator.v1.CreateSessionResponse.JoinTokensEntry
+	(*ParticipantStatus)(nil),           // 12: mpc.coordinator.v1.ParticipantStatus
+	(*DelegateShareInfo)(nil),           // 13: mpc.coordinator.v1.DelegateShareInfo
+	(*ReportCompletionRequest)(nil),     // 14: mpc.coordinator.v1.ReportCompletionRequest
+	(*ReportCompletionResponse)(nil),    // 15: mpc.coordinator.v1.ReportCompletionResponse
+	(*CloseSessionRequest)(nil),         // 16: mpc.coordinator.v1.CloseSessionRequest
+	(*CloseSessionResponse)(nil),        // 17: mpc.coordinator.v1.CloseSessionResponse
+	(*MarkPartyReadyRequest)(nil),       // 18: mpc.coordinator.v1.MarkPartyReadyRequest
+	(*MarkPartyReadyResponse)(nil),      // 19: mpc.coordinator.v1.MarkPartyReadyResponse
+	(*StartSessionRequest)(nil),         // 20: mpc.coordinator.v1.StartSessionRequest
+	(*StartSessionResponse)(nil),        // 21: mpc.coordinator.v1.StartSessionResponse
+	(*SubmitDelegateShareRequest)(nil),  // 22: mpc.coordinator.v1.SubmitDelegateShareRequest
+	(*SubmitDelegateShareResponse)(nil), // 23: mpc.coordinator.v1.SubmitDelegateShareResponse
+	nil,                                 // 24: mpc.coordinator.v1.CreateSessionResponse.JoinTokensEntry
 }
-var file_api_proto_session_coordinator_proto_depIdxs = []int32{
+var file_session_coordinator_proto_depIdxs = []int32{
 	3,  // 0: mpc.coordinator.v1.CreateSessionRequest.participants:type_name -> mpc.coordinator.v1.ParticipantInfo
 	2,  // 1: mpc.coordinator.v1.CreateSessionRequest.party_composition:type_name -> mpc.coordinator.v1.PartyComposition
 	1,  // 2: mpc.coordinator.v1.CreateSessionRequest.delegate_user_share:type_name -> mpc.coordinator.v1.DelegateUserShare
 	4,  // 3: mpc.coordinator.v1.ParticipantInfo.device_info:type_name -> mpc.coordinator.v1.DeviceInfo
-	23, // 4: mpc.coordinator.v1.CreateSessionResponse.join_tokens:type_name -> mpc.coordinator.v1.CreateSessionResponse.JoinTokensEntry
+	24, // 4: mpc.coordinator.v1.CreateSessionResponse.join_tokens:type_name -> mpc.coordinator.v1.CreateSessionResponse.JoinTokensEntry
 	4,  // 5: mpc.coordinator.v1.JoinSessionRequest.device_info:type_name -> mpc.coordinator.v1.DeviceInfo
 	8,  // 6: mpc.coordinator.v1.JoinSessionResponse.session_info:type_name -> mpc.coordinator.v1.SessionInfo
 	9,  // 7: mpc.coordinator.v1.JoinSessionResponse.other_parties:type_name -> mpc.coordinator.v1.PartyInfo
 	4,  // 8: mpc.coordinator.v1.PartyInfo.device_info:type_name -> mpc.coordinator.v1.DeviceInfo
-	12, // 9: mpc.coordinator.v1.GetSessionStatusResponse.delegate_share:type_name -> mpc.coordinator.v1.DelegateShareInfo
-	0,  // 10: mpc.coordinator.v1.SessionCoordinator.CreateSession:input_type -> mpc.coordinator.v1.CreateSessionRequest
-	6,  // 11: mpc.coordinator.v1.SessionCoordinator.JoinSession:input_type -> mpc.coordinator.v1.JoinSessionRequest
-	10, // 12: mpc.coordinator.v1.SessionCoordinator.GetSessionStatus:input_type -> mpc.coordinator.v1.GetSessionStatusRequest
-	17, // 13: mpc.coordinator.v1.SessionCoordinator.MarkPartyReady:input_type -> mpc.coordinator.v1.MarkPartyReadyRequest
-	19, // 14: mpc.coordinator.v1.SessionCoordinator.StartSession:input_type -> mpc.coordinator.v1.StartSessionRequest
-	13, // 15: mpc.coordinator.v1.SessionCoordinator.ReportCompletion:input_type -> mpc.coordinator.v1.ReportCompletionRequest
-	15, // 16: mpc.coordinator.v1.SessionCoordinator.CloseSession:input_type -> mpc.coordinator.v1.CloseSessionRequest
-	21, // 17: mpc.coordinator.v1.SessionCoordinator.SubmitDelegateShare:input_type -> mpc.coordinator.v1.SubmitDelegateShareRequest
-	5,  // 18: mpc.coordinator.v1.SessionCoordinator.CreateSession:output_type -> mpc.coordinator.v1.CreateSessionResponse
-	7,  // 19: mpc.coordinator.v1.SessionCoordinator.JoinSession:output_type -> mpc.coordinator.v1.JoinSessionResponse
-	11, // 20: mpc.coordinator.v1.SessionCoordinator.GetSessionStatus:output_type -> mpc.coordinator.v1.GetSessionStatusResponse
-	18, // 21: mpc.coordinator.v1.SessionCoordinator.MarkPartyReady:output_type -> mpc.coordinator.v1.MarkPartyReadyResponse
-	20, // 22: mpc.coordinator.v1.SessionCoordinator.StartSession:output_type -> mpc.coordinator.v1.StartSessionResponse
-	14, // 23: mpc.coordinator.v1.SessionCoordinator.ReportCompletion:output_type -> mpc.coordinator.v1.ReportCompletionResponse
-	16, // 24: mpc.coordinator.v1.SessionCoordinator.CloseSession:output_type -> mpc.coordinator.v1.CloseSessionResponse
-	22, // 25: mpc.coordinator.v1.SessionCoordinator.SubmitDelegateShare:output_type -> mpc.coordinator.v1.SubmitDelegateShareResponse
-	18, // [18:26] is the sub-list for method output_type
-	10, // [10:18] is the sub-list for method input_type
-	10, // [10:10] is the sub-list for extension type_name
-	10, // [10:10] is the sub-list for extension extendee
-	0,  // [0:10] is the sub-list for field type_name
+	13, // 9: mpc.coordinator.v1.GetSessionStatusResponse.delegate_share:type_name -> mpc.coordinator.v1.DelegateShareInfo
+	12, // 10: mpc.coordinator.v1.GetSessionStatusResponse.participants:type_name -> mpc.coordinator.v1.ParticipantStatus
+	0,  // 11: mpc.coordinator.v1.SessionCoordinator.CreateSession:input_type -> mpc.coordinator.v1.CreateSessionRequest
+	6,  // 12: mpc.coordinator.v1.SessionCoordinator.JoinSession:input_type -> mpc.coordinator.v1.JoinSessionRequest
+	10, // 13: mpc.coordinator.v1.SessionCoordinator.GetSessionStatus:input_type -> mpc.coordinator.v1.GetSessionStatusRequest
+	18, // 14: mpc.coordinator.v1.SessionCoordinator.MarkPartyReady:input_type -> mpc.coordinator.v1.MarkPartyReadyRequest
+	20, // 15: mpc.coordinator.v1.SessionCoordinator.StartSession:input_type -> mpc.coordinator.v1.StartSessionRequest
+	14, // 16: mpc.coordinator.v1.SessionCoordinator.ReportCompletion:input_type -> mpc.coordinator.v1.ReportCompletionRequest
+	16, // 17: mpc.coordinator.v1.SessionCoordinator.CloseSession:input_type -> mpc.coordinator.v1.CloseSessionRequest
+	22, // 18: mpc.coordinator.v1.SessionCoordinator.SubmitDelegateShare:input_type -> mpc.coordinator.v1.SubmitDelegateShareRequest
+	5,  // 19: mpc.coordinator.v1.SessionCoordinator.CreateSession:output_type -> mpc.coordinator.v1.CreateSessionResponse
+	7,  // 20: mpc.coordinator.v1.SessionCoordinator.JoinSession:output_type -> mpc.coordinator.v1.JoinSessionResponse
+	11, // 21: mpc.coordinator.v1.SessionCoordinator.GetSessionStatus:output_type -> mpc.coordinator.v1.GetSessionStatusResponse
+	19, // 22: mpc.coordinator.v1.SessionCoordinator.MarkPartyReady:output_type -> mpc.coordinator.v1.MarkPartyReadyResponse
+	21, // 23: mpc.coordinator.v1.SessionCoordinator.StartSession:output_type -> mpc.coordinator.v1.StartSessionResponse
+	15, // 24: mpc.coordinator.v1.SessionCoordinator.ReportCompletion:output_type -> mpc.coordinator.v1.ReportCompletionResponse
+	17, // 25: mpc.coordinator.v1.SessionCoordinator.CloseSession:output_type -> mpc.coordinator.v1.CloseSessionResponse
+	23, // 26: mpc.coordinator.v1.SessionCoordinator.SubmitDelegateShare:output_type -> mpc.coordinator.v1.SubmitDelegateShareResponse
+	19, // [19:27] is the sub-list for method output_type
+	11, // [11:19] is the sub-list for method input_type
+	11, // [11:11] is the sub-list for extension type_name
+	11, // [11:11] is the sub-list for extension extendee
+	0,  // [0:11] is the sub-list for field type_name
 }
 
-func init() { file_api_proto_session_coordinator_proto_init() }
-func file_api_proto_session_coordinator_proto_init() {
-	if File_api_proto_session_coordinator_proto != nil {
+func init() { file_session_coordinator_proto_init() }
+func file_session_coordinator_proto_init() {
+	if File_session_coordinator_proto != nil {
 		return
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: unsafe.Slice(unsafe.StringData(file_api_proto_session_coordinator_proto_rawDesc), len(file_api_proto_session_coordinator_proto_rawDesc)),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_session_coordinator_proto_rawDesc), len(file_session_coordinator_proto_rawDesc)),
 			NumEnums:      0,
-			NumMessages:   24,
+			NumMessages:   25,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
-		GoTypes:           file_api_proto_session_coordinator_proto_goTypes,
-		DependencyIndexes: file_api_proto_session_coordinator_proto_depIdxs,
-		MessageInfos:      file_api_proto_session_coordinator_proto_msgTypes,
+		GoTypes:           file_session_coordinator_proto_goTypes,
+		DependencyIndexes: file_session_coordinator_proto_depIdxs,
+		MessageInfos:      file_session_coordinator_proto_msgTypes,
 	}.Build()
-	File_api_proto_session_coordinator_proto = out.File
-	file_api_proto_session_coordinator_proto_goTypes = nil
-	file_api_proto_session_coordinator_proto_depIdxs = nil
+	File_session_coordinator_proto = out.File
+	file_session_coordinator_proto_goTypes = nil
+	file_session_coordinator_proto_depIdxs = nil
 }
diff --git a/backend/mpc-system/api/grpc/coordinator/v1/session_coordinator_grpc.pb.go b/backend/mpc-system/api/grpc/coordinator/v1/session_coordinator_grpc.pb.go
index ec50e1d7..408904fc 100644
--- a/backend/mpc-system/api/grpc/coordinator/v1/session_coordinator_grpc.pb.go
+++ b/backend/mpc-system/api/grpc/coordinator/v1/session_coordinator_grpc.pb.go
@@ -2,7 +2,7 @@
 // versions:
 // - protoc-gen-go-grpc v1.6.0
 // - protoc             v6.33.1
-// source: api/proto/session_coordinator.proto
+// source: session_coordinator.proto
 
 package coordinator
 
@@ -391,5 +391,5 @@ var SessionCoordinator_ServiceDesc = grpc.ServiceDesc{
 		},
 	},
 	Streams:  []grpc.StreamDesc{},
-	Metadata: "api/proto/session_coordinator.proto",
+	Metadata: "session_coordinator.proto",
 }
diff --git a/backend/mpc-system/api/proto/session_coordinator.proto b/backend/mpc-system/api/proto/session_coordinator.proto
index 72a5560c..f0ab1cac 100644
--- a/backend/mpc-system/api/proto/session_coordinator.proto
+++ b/backend/mpc-system/api/proto/session_coordinator.proto
@@ -132,6 +132,16 @@ message GetSessionStatusResponse {
   // Delegate share info (returned when keygen session completed and delegate party submitted share)
   // Only populated if session_type="keygen" AND has_delegate=true AND session is completed
   DelegateShareInfo delegate_share = 8;
+  // participants contains detailed participant information including party_index
+  // Used by service-party-app for co_managed_keygen sessions
+  repeated ParticipantStatus participants = 9;
+}
+
+// ParticipantStatus contains participant status information
+message ParticipantStatus {
+  string party_id = 1;
+  int32 party_index = 2;
+  string status = 3;                     // pending, joined, ready, completed
 }
 
 // DelegateShareInfo contains the delegate party's share for user
diff --git a/backend/mpc-system/services/account/adapters/input/http/co_managed_handler.go b/backend/mpc-system/services/account/adapters/input/http/co_managed_handler.go
index 1a1b3ed7..6be97f2b 100644
--- a/backend/mpc-system/services/account/adapters/input/http/co_managed_handler.go
+++ b/backend/mpc-system/services/account/adapters/input/http/co_managed_handler.go
@@ -159,17 +159,18 @@ func (h *CoManagedHTTPHandler) CreateSession(c *gin.Context) {
 		zap.Int("num_server_parties", len(resp.SelectedServerParties)))
 
 	c.JSON(http.StatusCreated, gin.H{
-		"session_id":             resp.SessionID,
-		"wallet_name":            req.WalletName,
-		"invite_code":            inviteCode,
-		"join_token":             wildcardToken, // Token for external participants
-		"threshold_n":            req.ThresholdN,
-		"threshold_t":            req.ThresholdT,
+		"session_id":              resp.SessionID,
+		"wallet_name":             req.WalletName,
+		"invite_code":             inviteCode,
+		"join_token":              wildcardToken,     // Token for external participants (backward compatible)
+		"join_tokens":             resp.JoinTokens,   // Full join tokens map for service-party-app
+		"threshold_n":             req.ThresholdN,
+		"threshold_t":             req.ThresholdT,
 		"selected_server_parties": resp.SelectedServerParties,
-		"status":                 "waiting_for_participants",
-		"current_participants":   len(resp.SelectedServerParties), // Server parties auto-joined
-		"required_participants":  req.ThresholdN,
-		"expires_at":             resp.ExpiresAt,
+		"status":                  "waiting_for_participants",
+		"current_participants":    len(resp.SelectedServerParties), // Server parties auto-joined
+		"required_participants":   req.ThresholdN,
+		"expires_at":              resp.ExpiresAt,
 	})
 }
 
@@ -322,6 +323,19 @@ func (h *CoManagedHTTPHandler) GetSessionStatus(c *gin.Context) {
 		result["public_key"] = hex.EncodeToString(resp.PublicKey)
 	}
 
+	// Include participants with party_index (for service-party-app to build correct participant list)
+	if len(resp.Participants) > 0 {
+		participants := make([]gin.H, len(resp.Participants))
+		for i, p := range resp.Participants {
+			participants[i] = gin.H{
+				"party_id":    p.PartyID,
+				"party_index": p.PartyIndex,
+				"status":      p.Status,
+			}
+		}
+		result["participants"] = participants
+	}
+
 	c.JSON(http.StatusOK, result)
 }
 
diff --git a/backend/mpc-system/services/account/adapters/output/grpc/session_coordinator_client.go b/backend/mpc-system/services/account/adapters/output/grpc/session_coordinator_client.go
index 17081338..1ce2a2e2 100644
--- a/backend/mpc-system/services/account/adapters/output/grpc/session_coordinator_client.go
+++ b/backend/mpc-system/services/account/adapters/output/grpc/session_coordinator_client.go
@@ -240,6 +240,18 @@ func (c *SessionCoordinatorClient) GetSessionStatus(
 		}
 	}
 
+	// Include participants if present (for co_managed_keygen sessions)
+	if len(resp.Participants) > 0 {
+		result.Participants = make([]ParticipantStatusInfo, len(resp.Participants))
+		for i, p := range resp.Participants {
+			result.Participants[i] = ParticipantStatusInfo{
+				PartyID:    p.PartyId,
+				PartyIndex: p.PartyIndex,
+				Status:     p.Status,
+			}
+		}
+	}
+
 	return result, nil
 }
 
@@ -290,6 +302,16 @@ type SessionStatusResponse struct {
 	// DelegateShare is non-nil when session_type="keygen" AND has_delegate=true AND session is completed
 	// nil with has_delegate=true means share was already retrieved (one-time retrieval)
 	DelegateShare *DelegateShareInfo
+	// Participants contains detailed participant information including party_index
+	// Used by service-party-app for co_managed_keygen sessions
+	Participants []ParticipantStatusInfo
+}
+
+// ParticipantStatusInfo contains participant status information
+type ParticipantStatusInfo struct {
+	PartyID    string
+	PartyIndex int32
+	Status     string
 }
 
 // DelegateShareInfo contains the delegate party's share for user
diff --git a/backend/mpc-system/services/service-party-app/electron/main.ts b/backend/mpc-system/services/service-party-app/electron/main.ts
index 52c24219..affff2fb 100644
--- a/backend/mpc-system/services/service-party-app/electron/main.ts
+++ b/backend/mpc-system/services/service-party-app/electron/main.ts
@@ -154,7 +154,37 @@ async function checkAndTriggerKeygen(sessionId: string) {
 
       debugLog.info('main', 'Session ready, triggering keygen...');
 
-      // 使用 activeKeygenSession 中已有的参与者信息
+      // 使用后端返回的 participants 信息（包含正确的 party_index）
+      // 这解决了 co_managed_keygen 中 server-party 和 service-party-app 混合的问题
+      if (status.participants && status.participants.length > 0) {
+        const myPartyId = grpcClient?.getPartyId();
+        const updatedParticipants: Array<{ partyId: string; partyIndex: number; name: string }> = [];
+
+        for (const p of status.participants) {
+          // 查找已有的参与者名称
+          const existing = activeKeygenSession.participants.find(ep => ep.partyId === p.party_id);
+          updatedParticipants.push({
+            partyId: p.party_id,
+            partyIndex: p.party_index,
+            name: existing?.name || (p.party_id === myPartyId ? '我' : `参与方 ${p.party_index + 1}`),
+          });
+        }
+
+        // 更新参与者列表
+        activeKeygenSession.participants = updatedParticipants;
+
+        // 更新自己的 partyIndex
+        const myInfo = updatedParticipants.find(p => p.partyId === myPartyId);
+        if (myInfo) {
+          activeKeygenSession.partyIndex = myInfo.partyIndex;
+        }
+
+        debugLog.info('main', `Updated participants from server: ${JSON.stringify(updatedParticipants.map(p => ({
+          partyId: p.partyId.substring(0, 8) + '...',
+          partyIndex: p.partyIndex,
+        })))}`);
+      }
+
       const selectedParties = activeKeygenSession.participants.map(p => p.partyId);
 
       await handleSessionStart({
@@ -676,7 +706,8 @@ function setupIpcHandlers() {
       }
 
       // 发起方自动加入会话
-      const joinToken = result.join_tokens?.[partyId];
+      // 优先使用 join_tokens map，如果没有则使用 wildcard token (join_token)
+      const joinToken = result.join_tokens?.[partyId] || result.join_tokens?.['*'] || result.join_token;
       if (joinToken) {
         console.log('Initiator auto-joining session...');
         const joinResult = await grpcClient?.joinSession(result.session_id, partyId, joinToken);
diff --git a/backend/mpc-system/services/service-party-app/electron/modules/account-client.ts b/backend/mpc-system/services/service-party-app/electron/modules/account-client.ts
index 26e35867..ab77c4e6 100644
--- a/backend/mpc-system/services/service-party-app/electron/modules/account-client.ts
+++ b/backend/mpc-system/services/service-party-app/electron/modules/account-client.ts
@@ -29,6 +29,7 @@ export interface CreateKeygenSessionResponse {
   threshold_t: number;
   selected_server_parties: string[];
   join_tokens: Record<string, string>;
+  join_token?: string; // Wildcard token for backward compatibility
   expires_at: number;
 }
 
@@ -62,6 +63,13 @@ export interface JoinSessionResponse {
   other_parties: PartyInfo[];
 }
 
+// Participant status information with party_index
+export interface ParticipantStatusInfo {
+  party_id: string;
+  party_index: number;
+  status: string;
+}
+
 export interface GetSessionStatusResponse {
   session_id: string;
   status: string;
@@ -71,6 +79,9 @@ export interface GetSessionStatusResponse {
   public_key?: string;
   signature?: string;
   has_delegate: boolean;
+  // participants contains detailed participant information including party_index
+  // Used for co_managed_keygen sessions to build correct participant list
+  participants?: ParticipantStatusInfo[];
 }
 
 export interface GetSessionByInviteCodeResponse {
diff --git a/backend/mpc-system/services/session-coordinator/adapters/input/grpc/session_grpc_handler.go b/backend/mpc-system/services/session-coordinator/adapters/input/grpc/session_grpc_handler.go
index 95c9fbd0..0e1df4d4 100644
--- a/backend/mpc-system/services/session-coordinator/adapters/input/grpc/session_grpc_handler.go
+++ b/backend/mpc-system/services/session-coordinator/adapters/input/grpc/session_grpc_handler.go
@@ -341,6 +341,16 @@ func (s *SessionCoordinatorServer) GetSessionStatus(
 		}
 	}
 
+	// Convert participants to proto format
+	protoParticipants := make([]*pb.ParticipantStatus, len(output.Participants))
+	for i, p := range output.Participants {
+		protoParticipants[i] = &pb.ParticipantStatus{
+			PartyId:    p.PartyID,
+			PartyIndex: int32(p.PartyIndex),
+			Status:     p.Status,
+		}
+	}
+
 	resp := &pb.GetSessionStatusResponse{
 		Status:           output.Status,
 		CompletedParties: int32(completedParties),
@@ -349,6 +359,7 @@ func (s *SessionCoordinatorServer) GetSessionStatus(
 		PublicKey:        output.PublicKey,
 		Signature:        output.Signature,
 		HasDelegate:      output.HasDelegate, // Only meaningful for keygen sessions
+		Participants:     protoParticipants,  // Include participant details with party_index
 	}
 
 	// Try to get delegate share from cache