diff --git a/pkg/grpc/client.go b/pkg/grpc/client.go
index ca3f014..c882dc8 100644
--- a/pkg/grpc/client.go
+++ b/pkg/grpc/client.go
@@ -8,6 +8,7 @@ import (
 	"google.golang.org/grpc"
 )
 
+var Friendships idpb.FriendshipsClient
 var Notify idpb.NotifyClient
 var Auth idpb.AuthClient
 
@@ -16,6 +17,7 @@ func ConnectPassport() error {
 	if conn, err := grpc.Dial(addr, grpc.WithTransportCredentials(insecure.NewCredentials())); err != nil {
 		return err
 	} else {
+		Friendships = idpb.NewFriendshipsClient(conn)
 		Notify = idpb.NewNotifyClient(conn)
 		Auth = idpb.NewAuthClient(conn)
 	}
diff --git a/pkg/services/accounts.go b/pkg/services/accounts.go
index c59277f..583a847 100644
--- a/pkg/services/accounts.go
+++ b/pkg/services/accounts.go
@@ -34,6 +34,17 @@ func GetAccountFollowed(user models.Account, target models.Account) (models.Acco
 	return relationship, err == nil
 }
 
+func GetAccountFriend(userId, relatedId uint, status int) (*proto.FriendshipResponse, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+	defer cancel()
+
+	return grpc.Friendships.GetFriendship(ctx, &proto.FriendshipTwoSideLookupRequest{
+		AccountId: uint64(userId),
+		RelatedId: uint64(relatedId),
+		Status:    uint32(status),
+	})
+}
+
 func NotifyAccount(user models.Account, subject, content string, realtime bool, links ...*proto.NotifyLink) error {
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
 	defer cancel()
diff --git a/pkg/services/realms.go b/pkg/services/realms.go
index 2588f52..9fb4b0a 100644
--- a/pkg/services/realms.go
+++ b/pkg/services/realms.go
@@ -1,6 +1,7 @@
 package services
 
 import (
+	"fmt"
 	"git.solsynth.dev/hydrogen/interactive/pkg/database"
 	"git.solsynth.dev/hydrogen/interactive/pkg/models"
 	"github.com/samber/lo"
@@ -76,13 +77,16 @@ func ListRealmMember(realmId uint) ([]models.RealmMember, error) {
 }
 
 func InviteRealmMember(user models.Account, target models.Realm) error {
+	if _, err := GetAccountFriend(user.ID, target.AccountID, 1); err != nil {
+		return fmt.Errorf("you only can invite your friends to your realm")
+	}
+
 	member := models.RealmMember{
 		RealmID:   target.ID,
 		AccountID: user.ID,
 	}
 
 	err := database.C.Save(&member).Error
-
 	return err
 }