diff --git a/eventmesh-examples/src/main/java/org/apache/eventmesh/selector/NacosSelector.java b/eventmesh-examples/src/main/java/org/apache/eventmesh/selector/NacosSelector.java
index 35a6f0a002..e2bafba3df 100644
--- a/eventmesh-examples/src/main/java/org/apache/eventmesh/selector/NacosSelector.java
+++ b/eventmesh-examples/src/main/java/org/apache/eventmesh/selector/NacosSelector.java
@@ -1,3 +1,20 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.apache.eventmesh.selector;
 
 import org.apache.eventmesh.client.selector.Selector;
diff --git a/eventmesh-filter-plugin/build.gradle b/eventmesh-filter-plugin/build.gradle
new file mode 100644
index 0000000000..d973dcedae
--- /dev/null
+++ b/eventmesh-filter-plugin/build.gradle
@@ -0,0 +1,16 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
\ No newline at end of file
diff --git a/eventmesh-filter-plugin/eventmesh-filter-api/build.gradle b/eventmesh-filter-plugin/eventmesh-filter-api/build.gradle
new file mode 100644
index 0000000000..51e1465ceb
--- /dev/null
+++ b/eventmesh-filter-plugin/eventmesh-filter-api/build.gradle
@@ -0,0 +1,23 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+dependencies {
+    api project(":eventmesh-spi")
+    api project(":eventmesh-common")
+
+    implementation "io.cloudevents:cloudevents-core"
+}
\ No newline at end of file
diff --git a/eventmesh-filter-plugin/eventmesh-filter-api/gradle.properties b/eventmesh-filter-plugin/eventmesh-filter-api/gradle.properties
new file mode 100644
index 0000000000..a9fd83fea0
--- /dev/null
+++ b/eventmesh-filter-plugin/eventmesh-filter-api/gradle.properties
@@ -0,0 +1,16 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
\ No newline at end of file
diff --git a/eventmesh-webhook/eventmesh-webhook-receive/src/main/java/org/apache/eventmesh/webhook/receive/protocol/GithubProtocol.java b/eventmesh-webhook/eventmesh-webhook-receive/src/main/java/org/apache/eventmesh/webhook/receive/protocol/GithubProtocol.java
index 1980c0c7ed..da3c87e9ae 100644
--- a/eventmesh-webhook/eventmesh-webhook-receive/src/main/java/org/apache/eventmesh/webhook/receive/protocol/GithubProtocol.java
+++ b/eventmesh-webhook/eventmesh-webhook-receive/src/main/java/org/apache/eventmesh/webhook/receive/protocol/GithubProtocol.java
@@ -43,7 +43,7 @@ public class GithubProtocol implements ManufacturerProtocol {
 
     private static final String H_MAC_SHA = "HmacSHA256";
 
-    private static final Char ZERO_CHAR = '0';
+    private static final char ZERO_CHAR = '0';
 
     public Logger logger = LoggerFactory.getLogger(this.getClass());
 
diff --git a/settings.gradle b/settings.gradle
index 18c0c26dd6..dc089f0b33 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -65,3 +65,5 @@ include 'eventmesh-webhook:eventmesh-webhook-api'
 include 'eventmesh-webhook:eventmesh-webhook-admin'
 include 'eventmesh-webhook:eventmesh-webhook-receive'
 
+include 'eventmesh-filter-plugin'
+include 'eventmesh-filter-plugin:eventmesh-filter-api'