diff --git a/android/src/main/java/com/finogeeks/mop/api/ApisManager.java b/android/src/main/java/com/finogeeks/mop/api/ApisManager.java
index c9dca8b..39bdfee 100644
--- a/android/src/main/java/com/finogeeks/mop/api/ApisManager.java
+++ b/android/src/main/java/com/finogeeks/mop/api/ApisManager.java
@@ -9,6 +9,7 @@ import com.finogeeks.mop.api.mop.AppletModule;
 import com.finogeeks.mop.api.mop.BaseModule;
 import com.finogeeks.mop.api.mop.ExtensionApiModule;
 import com.finogeeks.mop.api.mop.VersionModule;
+import com.finogeeks.mop.api.mop.SmSignModule;
 import com.finogeeks.mop.interfaces.Event;
 import com.finogeeks.mop.interfaces.IApi;
 
@@ -69,6 +70,7 @@ public class ApisManager {
         add(new AppletHandlerModule(activity));
         add(new ExtensionApiModule(activity));
         add(new VersionModule(activity));
+        add(new SmSignModule(activity));
     }
 
     private void add(IApi api) {
diff --git a/android/src/main/java/com/finogeeks/mop/api/mop/SmSignModule.java b/android/src/main/java/com/finogeeks/mop/api/mop/SmSignModule.java
new file mode 100644
index 0000000..2d948ae
--- /dev/null
+++ b/android/src/main/java/com/finogeeks/mop/api/mop/SmSignModule.java
@@ -0,0 +1,34 @@
+package com.finogeeks.mop.api.mop;
+
+import android.content.Context;
+
+import com.finogeeks.finochat.sdkcore.client.FinoChatSDKCoreClient;
+import com.finogeeks.lib.applet.client.FinAppClient;
+import com.finogeeks.lib.applet.db.entity.FinApplet;
+import com.finogeeks.mop.api.BaseApi;
+import com.finogeeks.mop.interfaces.ICallback;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class SmSignModule extends BaseApi {
+
+    public SmSignModule(Context context) {
+        super(context);
+    }
+
+    @Override
+    public String[] apis() {
+        return new String[]{"smsign"};
+    }
+
+    @Override
+    public void invoke(String event, Map param, ICallback callback) {
+        String text = (String) param.get("plainText");
+        String result = FinoChatSDKCoreClient.getInstance().finoLicenseService().messageDigest(text);
+        Map<String, Object> res = new HashMap<>();
+        res.put("data", result);
+        callback.onSuccess(res);
+    }
+
+}