diff --git a/.github/plugin/marketplace.json b/.github/plugin/marketplace.json
index 30364bd..c89d0b8 100644
--- a/.github/plugin/marketplace.json
+++ b/.github/plugin/marketplace.json
@@ -468,6 +468,29 @@
         "flowagent"
       ],
       "license": "MIT"
+    },
+    {
+      "name": "hol-guard",
+      "source": {
+        "source": "github",
+        "repo": "hashgraph-online/hol-guard-plugin"
+      },
+      "description": "Local-first AI agent security with approvals, security receipts, MCP visibility, and pre-trust scanning for skills, plugins, and MCP servers.",
+      "version": "0.1.0",
+      "author": {
+        "name": "Hashgraph Online",
+        "url": "https://hol.org"
+      },
+      "homepage": "https://hol.org/guard",
+      "repository": "https://github.com/hashgraph-online/hol-guard-plugin",
+      "keywords": [
+        "ai-security",
+        "agent-security",
+        "mcp-security",
+        "agent-skills",
+        "supply-chain-security"
+      ],
+      "license": "Apache-2.0"
     }
   ]
 }
diff --git a/README.md b/README.md
index 62b4f45..cb20070 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,8 @@ This marketplace also references plugins hosted in other repositories:
 
 - **[Power Platform Skills](https://github.com/microsoft/power-platform-skills)** — `power-pages`, `model-apps`, `mcp-apps`, `canvas-apps`, `code-apps-preview`, `mobile-app`, `power-automate`. Plugins for Power Platform development (Power Pages sites, model-driven and canvas apps, code apps, MCP App widgets, mobile apps, and Power Automate cloud flows).
 
+- **[HOL Guard](https://hol.org/guard)** — `hol-guard`. Local-first AI agent security with approvals, security receipts, MCP visibility, and pre-trust scanning for skills, plugins, and MCP servers.
+
 ## 🤝 Contributing
 
 We'd love your contributions! Please read our [Contributing Guide](CONTRIBUTING.md) for details on how to submit pull requests.