diff --git a/.github/workflows/add-runtime-custom-property.yml b/.github/workflows/add-runtime-custom-property.yml
new file mode 100644
index 0000000..300119b
--- /dev/null
+++ b/.github/workflows/add-runtime-custom-property.yml
@@ -0,0 +1,20 @@
+# action that runs monthly and add runtime as a custom property
+# to all repositories in this organization
+name: Add Runtime as Custom Property to Repositories
+on:
+  schedule:
+    - cron: '0 0 22 * *'
+  workflow_dispatch:
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4.1.6
+        with:
+          repository: ${{ secrets.RUNTIME_REPOSITORY }}
+          token: ${{ secrets.RUNTIME_REPO_READ_TOKEN }}
+      - uses: brave/security-action/actions/add-runtime-custom-property@main
+        with:
+          github_token: ${{ secrets.CUSTOM_PROPERTY_MANAGER_GITHUB_TOKEN }}
+          static_repositories: ${{ secrets.STATIC_WEBSITE_REPOSITORIES }}
+          runtime_directory: ${{ github.workspace }}
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