diff --git a/core/async/asyncCheckEngineX.go b/core/async/asyncCheckEngineX.go
index 0b06fde..44dc3b7 100644
--- a/core/async/asyncCheckEngineX.go
+++ b/core/async/asyncCheckEngineX.go
@@ -27,6 +27,12 @@ func NewAsyncCheckEngine() *AsyncCheckEngine {
 }
 
 func (e *AsyncCheckEngine) Start() {
+	// heart beat detection
+	if !e.heartbeat() {
+		logger.Errorln("cannot access target website successfully: http://api.ceye.io")
+		return
+	}
+
 	// build a request
 	request, _ := http.NewRequest("GET", e.httpAPI, nil)
 	client := http.Client{}
@@ -66,6 +72,27 @@ func (e *AsyncCheckEngine) Start() {
 	}
 }
 
+//
+// heartbeat
+//  @Description: check the health of http://api.ceye.io/ three times
+//  @receiver e
+//  @return bool
+//
+func (e *AsyncCheckEngine) heartbeat() bool {
+	request, _ := http.NewRequest("GET", e.httpAPI, nil)
+	client := http.Client{}
+
+	for i := 0; i < 3; i++ {
+		response, err := client.Do(request)
+		if err != nil || response.StatusCode >= 500 {
+			logger.Debugln(err)
+		} else {
+			return true
+		}
+	}
+	return false
+}
+
 func (e *AsyncCheckEngine) check(token string) {
 	logger.Infoln(fmt.Sprintf("[async check] token: %s", token))
 
diff --git a/core/async/asyncCheckEngineX_test.go b/core/async/asyncCheckEngineX_test.go
index dce215f..364458f 100644
--- a/core/async/asyncCheckEngineX_test.go
+++ b/core/async/asyncCheckEngineX_test.go
@@ -1,6 +1,8 @@
 package async
 
-import "testing"
+import (
+	"testing"
+)
 
 func TestAsyncCheckEngine_Start(t *testing.T) {
 	type fields struct {
@@ -24,3 +26,35 @@ func TestAsyncCheckEngine_Start(t *testing.T) {
 		})
 	}
 }
+
+func TestAsyncCheckEngine_heartbeat(t *testing.T) {
+	type fields struct {
+		httpAPI      string
+		lastRecordId string
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		want   bool
+	}{
+		{
+			name: "",
+			fields: fields{
+				httpAPI:      "http://api.ceye.io/v1/records?token=0920449a5ed8b9db7a287a66a6632498&type=http",
+				lastRecordId: "xxxxx",
+			},
+			want: false,
+		}, // TODO: Add test cases.
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			e := &AsyncCheckEngine{
+				httpAPI:      tt.fields.httpAPI,
+				lastRecordId: tt.fields.lastRecordId,
+			}
+			if got := e.heartbeat(); got != tt.want {
+				t.Errorf("heartbeat() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}