diff --git a/internal/vendor/vendor.go b/internal/vendor/vendor.go
index 73e1e04..835a504 100644
--- a/internal/vendor/vendor.go
+++ b/internal/vendor/vendor.go
@@ -7,7 +7,9 @@ import (
 	"errors"
 	"fmt"
 	"maps"
+	"net"
 	"os"
+	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -485,11 +487,19 @@ func newVendorClients(conns map[string]*BackendConn) (*VendorClients, error) {
 }
 
 func NewGrpcConn(ctx context.Context, conf *model.Backend) (*grpc.ClientConn, error) {
-	if conf.Endpoint == "" {
-		return nil, errors.New("new grpc client failed, endpoint is empty")
+	if err := conf.Validate(); err != nil {
+		return nil, err
 	}
-	if conf.Consul.ServiceName != "" && conf.Etcd.ServiceName != "" {
-		return nil, errors.New("new grpc client failed, consul and etcd can't be used at the same time")
+	_, _, err := net.SplitHostPort(conf.Endpoint)
+	if err != nil {
+		if !strings.Contains(err.Error(), "missing port in address") {
+			return nil, err
+		}
+		if conf.TLS {
+			conf.Endpoint += ":443"
+		} else {
+			conf.Endpoint += ":80"
+		}
 	}
 	middlewares := []middleware.Middleware{kcircuitbreaker.Client(kcircuitbreaker.WithCircuitBreaker(func() circuitbreaker.CircuitBreaker {
 		return sre.NewBreaker(
@@ -551,10 +561,7 @@ func NewGrpcConn(ctx context.Context, conf *model.Backend) (*grpc.ClientConn, er
 		log.Infof("new grpc client with endpoint: %s", conf.Endpoint)
 	}
 
-	var (
-		con *grpc.ClientConn
-		err error
-	)
+	var con *grpc.ClientConn
 	if conf.TLS {
 		var rootCAs *x509.CertPool
 		rootCAs, err = x509.SystemCertPool()
@@ -588,6 +595,17 @@ func NewHttpClientConn(ctx context.Context, conf *model.Backend) (*http.Client,
 	if err := conf.Validate(); err != nil {
 		return nil, err
 	}
+	_, _, err := net.SplitHostPort(conf.Endpoint)
+	if err != nil {
+		if !strings.Contains(err.Error(), "missing port in address") {
+			return nil, err
+		}
+		if conf.TLS {
+			conf.Endpoint += ":443"
+		} else {
+			conf.Endpoint += ":80"
+		}
+	}
 	middlewares := []middleware.Middleware{kcircuitbreaker.Client(kcircuitbreaker.WithCircuitBreaker(func() circuitbreaker.CircuitBreaker {
 		return sre.NewBreaker(
 			sre.WithRequest(25),