diff --git a/go/greptime/v1/prom.pb.go b/go/greptime/v1/prom.pb.go
index 714d0c0..bd2d598 100644
--- a/go/greptime/v1/prom.pb.go
+++ b/go/greptime/v1/prom.pb.go
@@ -28,7 +28,7 @@ type PromqlRequest struct {
 	Header *RequestHeader `protobuf:"bytes,1,opt,name=header,proto3" json:"header,omitempty"`
 	// Types that are assignable to Promql:
 	//
-	//	*PromqlRequest_Query
+	//	*PromqlRequest_InstantQuery
 	//	*PromqlRequest_RangeQuery
 	Promql isPromqlRequest_Promql `protobuf_oneof:"promql"`
 }
@@ -79,11 +79,11 @@ func (m *PromqlRequest) GetPromql() isPromqlRequest_Promql {
 	return nil
 }
 
-func (x *PromqlRequest) GetQuery() string {
-	if x, ok := x.GetPromql().(*PromqlRequest_Query); ok {
-		return x.Query
+func (x *PromqlRequest) GetInstantQuery() *PromInstantQuery {
+	if x, ok := x.GetPromql().(*PromqlRequest_InstantQuery); ok {
+		return x.InstantQuery
 	}
-	return ""
+	return nil
 }
 
 func (x *PromqlRequest) GetRangeQuery() *PromRangeQuery {
@@ -97,15 +97,15 @@ type isPromqlRequest_Promql interface {
 	isPromqlRequest_Promql()
 }
 
-type PromqlRequest_Query struct {
-	Query string `protobuf:"bytes,2,opt,name=query,proto3,oneof"`
+type PromqlRequest_InstantQuery struct {
+	InstantQuery *PromInstantQuery `protobuf:"bytes,2,opt,name=instant_query,json=instantQuery,proto3,oneof"`
 }
 
 type PromqlRequest_RangeQuery struct {
 	RangeQuery *PromRangeQuery `protobuf:"bytes,3,opt,name=range_query,json=rangeQuery,proto3,oneof"`
 }
 
-func (*PromqlRequest_Query) isPromqlRequest_Promql() {}
+func (*PromqlRequest_InstantQuery) isPromqlRequest_Promql() {}
 
 func (*PromqlRequest_RangeQuery) isPromqlRequest_Promql() {}
 
@@ -164,6 +164,61 @@ func (x *PromqlResponse) GetBody() []byte {
 	return nil
 }
 
+type PromInstantQuery struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Query string `protobuf:"bytes,1,opt,name=query,proto3" json:"query,omitempty"`
+	Time  string `protobuf:"bytes,2,opt,name=time,proto3" json:"time,omitempty"`
+}
+
+func (x *PromInstantQuery) Reset() {
+	*x = PromInstantQuery{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_prom_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *PromInstantQuery) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*PromInstantQuery) ProtoMessage() {}
+
+func (x *PromInstantQuery) ProtoReflect() protoreflect.Message {
+	mi := &file_greptime_v1_prom_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use PromInstantQuery.ProtoReflect.Descriptor instead.
+func (*PromInstantQuery) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_prom_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *PromInstantQuery) GetQuery() string {
+	if x != nil {
+		return x.Query
+	}
+	return ""
+}
+
+func (x *PromInstantQuery) GetTime() string {
+	if x != nil {
+		return x.Time
+	}
+	return ""
+}
+
 type PromRangeQuery struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -178,7 +233,7 @@ type PromRangeQuery struct {
 func (x *PromRangeQuery) Reset() {
 	*x = PromRangeQuery{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_prom_proto_msgTypes[2]
+		mi := &file_greptime_v1_prom_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -191,7 +246,7 @@ func (x *PromRangeQuery) String() string {
 func (*PromRangeQuery) ProtoMessage() {}
 
 func (x *PromRangeQuery) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_prom_proto_msgTypes[2]
+	mi := &file_greptime_v1_prom_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -204,7 +259,7 @@ func (x *PromRangeQuery) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PromRangeQuery.ProtoReflect.Descriptor instead.
 func (*PromRangeQuery) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_prom_proto_rawDescGZIP(), []int{2}
+	return file_greptime_v1_prom_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *PromRangeQuery) GetQuery() string {
@@ -242,40 +297,47 @@ var file_greptime_v1_prom_proto_rawDesc = []byte{
 	0x6f, 0x6d, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0b, 0x67, 0x72, 0x65, 0x70, 0x74, 0x69,
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+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -290,25 +352,27 @@ func file_greptime_v1_prom_proto_rawDescGZIP() []byte {
 	return file_greptime_v1_prom_proto_rawDescData
 }
 
-var file_greptime_v1_prom_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_greptime_v1_prom_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
 var file_greptime_v1_prom_proto_goTypes = []interface{}{
-	(*PromqlRequest)(nil),  // 0: greptime.v1.PromqlRequest
-	(*PromqlResponse)(nil), // 1: greptime.v1.PromqlResponse
-	(*PromRangeQuery)(nil), // 2: greptime.v1.PromRangeQuery
-	(*RequestHeader)(nil),  // 3: greptime.v1.RequestHeader
-	(*ResponseHeader)(nil), // 4: greptime.v1.ResponseHeader
+	(*PromqlRequest)(nil),    // 0: greptime.v1.PromqlRequest
+	(*PromqlResponse)(nil),   // 1: greptime.v1.PromqlResponse
+	(*PromInstantQuery)(nil), // 2: greptime.v1.PromInstantQuery
+	(*PromRangeQuery)(nil),   // 3: greptime.v1.PromRangeQuery
+	(*RequestHeader)(nil),    // 4: greptime.v1.RequestHeader
+	(*ResponseHeader)(nil),   // 5: greptime.v1.ResponseHeader
 }
 var file_greptime_v1_prom_proto_depIdxs = []int32{
-	3, // 0: greptime.v1.PromqlRequest.header:type_name -> greptime.v1.RequestHeader
-	2, // 1: greptime.v1.PromqlRequest.range_query:type_name -> greptime.v1.PromRangeQuery
-	4, // 2: greptime.v1.PromqlResponse.header:type_name -> greptime.v1.ResponseHeader
-	0, // 3: greptime.v1.PrometheusGateway.Handle:input_type -> greptime.v1.PromqlRequest
-	1, // 4: greptime.v1.PrometheusGateway.Handle:output_type -> greptime.v1.PromqlResponse
-	4, // [4:5] is the sub-list for method output_type
-	3, // [3:4] is the sub-list for method input_type
-	3, // [3:3] is the sub-list for extension type_name
-	3, // [3:3] is the sub-list for extension extendee
-	0, // [0:3] is the sub-list for field type_name
+	4, // 0: greptime.v1.PromqlRequest.header:type_name -> greptime.v1.RequestHeader
+	2, // 1: greptime.v1.PromqlRequest.instant_query:type_name -> greptime.v1.PromInstantQuery
+	3, // 2: greptime.v1.PromqlRequest.range_query:type_name -> greptime.v1.PromRangeQuery
+	5, // 3: greptime.v1.PromqlResponse.header:type_name -> greptime.v1.ResponseHeader
+	0, // 4: greptime.v1.PrometheusGateway.Handle:input_type -> greptime.v1.PromqlRequest
+	1, // 5: greptime.v1.PrometheusGateway.Handle:output_type -> greptime.v1.PromqlResponse
+	5, // [5:6] is the sub-list for method output_type
+	4, // [4:5] is the sub-list for method input_type
+	4, // [4:4] is the sub-list for extension type_name
+	4, // [4:4] is the sub-list for extension extendee
+	0, // [0:4] is the sub-list for field type_name
 }
 
 func init() { file_greptime_v1_prom_proto_init() }
@@ -343,6 +407,18 @@ func file_greptime_v1_prom_proto_init() {
 			}
 		}
 		file_greptime_v1_prom_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*PromInstantQuery); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_greptime_v1_prom_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*PromRangeQuery); i {
 			case 0:
 				return &v.state
@@ -356,7 +432,7 @@ func file_greptime_v1_prom_proto_init() {
 		}
 	}
 	file_greptime_v1_prom_proto_msgTypes[0].OneofWrappers = []interface{}{
-		(*PromqlRequest_Query)(nil),
+		(*PromqlRequest_InstantQuery)(nil),
 		(*PromqlRequest_RangeQuery)(nil),
 	}
 	type x struct{}
@@ -365,7 +441,7 @@ func file_greptime_v1_prom_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_greptime_v1_prom_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   3,
+			NumMessages:   4,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/proto/greptime/v1/prom.proto b/proto/greptime/v1/prom.proto
index 8d10764..177fc91 100644
--- a/proto/greptime/v1/prom.proto
+++ b/proto/greptime/v1/prom.proto
@@ -16,7 +16,7 @@ service PrometheusGateway {
 message PromqlRequest {
   RequestHeader header = 1;
   oneof promql {
-    string query = 2;
+    PromInstantQuery instant_query = 2;
     PromRangeQuery range_query = 3;
   }
 }
@@ -26,6 +26,11 @@ message PromqlResponse {
   bytes body = 2; // absolutely same format as Prometheus in JSON
 }
 
+message PromInstantQuery {
+  string query = 1;
+  string time = 2;
+}
+
 message PromRangeQuery {
   string query = 1;
   string start = 2;