diff --git a/.github/workflows/license-header-checker.yml b/.github/workflows/license-header-checker.yml
new file mode 100644
index 000000000..7a66ceb3b
--- /dev/null
+++ b/.github/workflows/license-header-checker.yml
@@ -0,0 +1,12 @@
+---
+name: License Header Checker
+
+on: [push, pull_request]
+
+jobs:
+  license-header-checker:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - name: Add License Header
+        run: npx @kt3k/license-checker@3.2.2
diff --git a/.licenserc.json b/.licenserc.json
new file mode 100644
index 000000000..d6c9492bc
--- /dev/null
+++ b/.licenserc.json
@@ -0,0 +1,35 @@
+{
+  "**/*.*": [
+    " Copyright OpenSearch Contributors",
+    " SPDX-License-Identifier: Apache-2.0"
+  ],
+  "ignore": [
+    ".md",
+    ".json",
+    ".yml",
+    ".yaml",
+    ".txt",
+    ".xml",
+    ".config",
+    ".png",
+    ".jar",
+    ".gz",
+    ".lock",
+    ".toml",
+    ".ini",
+    ".bat",
+    ".policy",
+    ".properties",
+    ".git",
+    ".gitignore",
+    ".whitesource",
+    ".gradle",
+    "gradle/wrapper",
+    "settings.gradle",
+    "**/build/",
+    "licenses/",
+    "src/test/resources/",
+    "LICENSE",
+    "NOTICE"
+  ]
+}
diff --git a/build.gradle b/build.gradle
index 8fbc565ed..9da5de112 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,3 +1,8 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 import java.nio.file.Files
 import org.opensearch.gradle.testclusters.OpenSearchCluster
 import org.opensearch.gradle.testclusters.StandaloneRestIntegTestTask
diff --git a/formatter/formatting.gradle b/formatter/formatting.gradle
index 1afe47006..50cd0b8ed 100644
--- a/formatter/formatting.gradle
+++ b/formatter/formatting.gradle
@@ -1,3 +1,8 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 allprojects {
     spotless {
         java {
diff --git a/src/main/resources/META-INF/services/org.opensearch.security.spi.resources.ResourceSharingExtension b/src/main/resources/META-INF/services/org.opensearch.security.spi.resources.ResourceSharingExtension
index eadaac9f2..d0a9a7bdc 100644
--- a/src/main/resources/META-INF/services/org.opensearch.security.spi.resources.ResourceSharingExtension
+++ b/src/main/resources/META-INF/services/org.opensearch.security.spi.resources.ResourceSharingExtension
@@ -1 +1,4 @@
+# Copyright OpenSearch Contributors
+# SPDX-License-Identifier: Apache-2.0
+
 org.opensearch.flowframework.FlowFrameworkResourceSharingExtension