diff --git a/cmd/servicechecker/main.go b/cmd/servicechecker/main.go
index 5c4508d..13ad43c 100644
--- a/cmd/servicechecker/main.go
+++ b/cmd/servicechecker/main.go
@@ -159,19 +159,6 @@ func main() {
 func newHTTPTask(ctx context.Context, l logger.Logger, m meter.Meter, check string, task *config.Task) (any, []any, error) {
 	var err error
 
-	openapiBuf, err := os.ReadFile(task.HTTP.OpenAPI)
-	if err != nil {
-		l.Error(ctx, "failed to unmarshal openapi file", err)
-		return nil, nil, err
-	}
-
-	doc, err := openapi_v3.ParseDocument(openapiBuf)
-	if err != nil {
-		l.Error(ctx, "failed to unmarshal openapi file", err)
-		return nil, nil, err
-	}
-	_ = doc
-
 	c, ok := clients["http"]
 	if !ok {
 		err = fmt.Errorf("unknown client http")
@@ -179,23 +166,48 @@ func newHTTPTask(ctx context.Context, l logger.Logger, m meter.Meter, check stri
 		return nil, nil, err
 	}
 
-	errmap := make(map[string]interface{}, 1)
-	errmap["default"] = &codecpb.Frame{}
-	opts := []client.CallOption{
-		httpcli.ErrorMap(errmap),
-		httpcli.Method(task.HTTP.Method),
-		httpcli.Path(task.HTTP.Endpoint),
-		// client.WithContentType("application/json"),
-	}
-	rsp := &codecpb.Frame{}
+	var req interface{}
+	var rsp interface{}
+	var treq client.Request
+	var opts []client.CallOption
+	var labels []string
 
-	treq := c.NewRequest(task.Name, task.Name, &codecpb.Frame{Data: []byte(task.HTTP.Data)})
+	if task.HTTP.OpenAPI != "" {
+
+		openapiBuf, err := os.ReadFile(task.HTTP.OpenAPI)
+		if err != nil {
+			l.Error(ctx, "failed to unmarshal openapi file", err)
+			return nil, nil, err
+		}
+
+		doc, err := openapi_v3.ParseDocument(openapiBuf)
+		if err != nil {
+			l.Error(ctx, "failed to unmarshal openapi file", err)
+			return nil, nil, err
+		}
+		_ = doc
+
+		errmap := make(map[string]interface{}, 1)
+		errmap["default"] = &codecpb.Frame{}
+		opts = []client.CallOption{
+			httpcli.ErrorMap(errmap),
+			httpcli.Method(task.HTTP.Method),
+			httpcli.Path(task.HTTP.Endpoint),
+			// client.WithContentType("application/json"),
+		}
+
+		req = &codecpb.Frame{Data: []byte(task.HTTP.Data)}
+		rsp = &codecpb.Frame{}
+
+		treq = c.NewRequest(task.Name, task.Name, req)
+
+		labels = []string{"check", check, "task", task.Name, "service", task.Name, "endpoint", task.Name}
+	}
 
 	fn := func() {
-		labels := []string{"check", check, "task", task.Name, "service", task.Name, "endpoint", task.Name}
 		m.Counter(semconv.ClientRequestInflight, labels...).Inc()
 		ts := time.Now()
-		l.Info(ctx, fmt.Sprintf("try to call %s.%s via %s", task.Name, task.Name, task.HTTP.Addr))
+		// l.Info(ctx, fmt.Sprintf("try to call %s.%s via %s", task.Name, task.Name, task.HTTP.Addr))
 		err = httpconn.Call(ctx, l, c, task.HTTP.Addr, time.Duration(task.Timeout),
 			treq,
 			rsp,
@@ -217,25 +229,6 @@ func newHTTPTask(ctx context.Context, l logger.Logger, m meter.Meter, check stri
 func newGRPCTask(ctx context.Context, l logger.Logger, m meter.Meter, check string, task *config.Task) (any, []any, error) {
 	var err error
 
-	protosetBuf, err := os.ReadFile(task.GRPC.Protoset)
-	if err != nil {
-		l.Error(ctx, "failed to unmarshal protoset file", err)
-		return nil, nil, err
-	}
-
-	fdset := &descriptorpb.FileDescriptorSet{}
-	if err = protocodec.NewCodec().Unmarshal(protosetBuf, fdset); err != nil {
-		l.Error(ctx, "failed to unmarshal protoset file", err)
-		return nil, nil, err
-	}
-
-	pfileoptions := protodesc.FileOptions{AllowUnresolvable: true}
-	pfiles, err := pfileoptions.NewFiles(fdset)
-	if err != nil {
-		l.Error(ctx, "failed to use protoset file", err)
-		return nil, nil, err
-	}
-
 	c, ok := clients["grpc"]
 	if !ok {
 		err = fmt.Errorf("unknown client grpc")
@@ -243,42 +236,69 @@ func newGRPCTask(ctx context.Context, l logger.Logger, m meter.Meter, check stri
 		return nil, nil, err
 	}
 
-	pkg, svc, mth := grpcconn.ServiceMethod(task.GRPC.Endpoint)
-	pdesc, err := pfiles.FindDescriptorByName(protoreflect.FullName(pkg + "." + svc))
-	if err != nil {
-		l.Error(ctx, "failed to find service "+pkg+"."+svc)
-		return nil, nil, err
+	var req interface{}
+	var rsp interface{}
+	var treq client.Request
+	var labels []string
+
+	if task.GRPC.Protoset != "" {
+		protosetBuf, err := os.ReadFile(task.GRPC.Protoset)
+		if err != nil {
+			l.Error(ctx, "failed to unmarshal protoset file", err)
+			return nil, nil, err
+		}
+
+		fdset := &descriptorpb.FileDescriptorSet{}
+		if err = protocodec.NewCodec().Unmarshal(protosetBuf, fdset); err != nil {
+			l.Error(ctx, "failed to unmarshal protoset file", err)
+			return nil, nil, err
+		}
+
+		pfileoptions := protodesc.FileOptions{AllowUnresolvable: true}
+		pfiles, err := pfileoptions.NewFiles(fdset)
+		if err != nil {
+			l.Error(ctx, "failed to use protoset file", err)
+			return nil, nil, err
+		}
+
+		pkg, svc, mth := grpcconn.ServiceMethod(task.GRPC.Endpoint)
+		pdesc, err := pfiles.FindDescriptorByName(protoreflect.FullName(pkg + "." + svc))
+		if err != nil {
+			l.Error(ctx, "failed to find service "+pkg+"."+svc)
+			return nil, nil, err
+		}
+
+		sdesc, ok := pdesc.(protoreflect.ServiceDescriptor)
+		if !ok {
+			err = fmt.Errorf("failed to find service " + pkg + "." + svc)
+			l.Error(ctx, "unable to find service in protoset", err)
+			return nil, nil, err
+		}
+
+		mdesc := sdesc.Methods().ByName(protoreflect.Name(mth))
+		if mdesc == nil {
+			err = fmt.Errorf("unknown method " + mth)
+			l.Error(ctx, "failed to find method", err)
+			return nil, nil, err
+		}
+
+		req = dynamicpb.NewMessageType(mdesc.Input()).New()
+		rsp = dynamicpb.NewMessageType(mdesc.Output()).New()
+
+		if err = jsonpbcodec.NewCodec().Unmarshal([]byte(task.GRPC.Data), req); err != nil {
+			l.Error(ctx, "failed to unmarshal", err)
+			return nil, nil, err
+		}
+
+		treq = c.NewRequest(pkg, svc+"."+mth, req)
+
+		labels = []string{"check", check, "task", task.Name, "service", svc, "endpoint", mth}
 	}
 
-	sdesc, ok := pdesc.(protoreflect.ServiceDescriptor)
-	if !ok {
-		err = fmt.Errorf("failed to find service " + pkg + "." + svc)
-		l.Error(ctx, "unable to find service in protoset", err)
-		return nil, nil, err
-	}
-
-	mdesc := sdesc.Methods().ByName(protoreflect.Name(mth))
-	if mdesc == nil {
-		err = fmt.Errorf("unknown method " + mth)
-		l.Error(ctx, "failed to find method", err)
-		return nil, nil, err
-	}
-
-	req := dynamicpb.NewMessageType(mdesc.Input()).New()
-	rsp := dynamicpb.NewMessageType(mdesc.Output()).New()
-
-	if err = jsonpbcodec.NewCodec().Unmarshal([]byte(task.GRPC.Data), req); err != nil {
-		l.Error(ctx, "failed to unmarshal", err)
-		return nil, nil, err
-	}
-
-	treq := c.NewRequest(pkg, svc+"."+mth, req)
-
 	fn := func() {
-		labels := []string{"check", check, "task", task.Name, "service", svc, "endpoint", mth}
 		m.Counter(semconv.ClientRequestInflight, labels...).Inc()
 		ts := time.Now()
-		l.Info(ctx, fmt.Sprintf("try to call %s.%s via %s", svc, mth, task.GRPC.Addr))
+
 		err = grpcconn.Call(ctx, l, c, task.GRPC.Addr, time.Duration(task.Timeout),
 			treq,
 			rsp)