diff --git a/.cursor-plugin/marketplace.json b/.cursor-plugin/marketplace.json
index 9b31a43f9..c6cb76483 100644
--- a/.cursor-plugin/marketplace.json
+++ b/.cursor-plugin/marketplace.json
@@ -652,6 +652,11 @@
       "name": "servicenow",
       "source": "third_party/servicenow",
       "description": "Call the tools your admin publishes on a ServiceNow instance."
+    },
+    {
+      "name": "otc-llc",
+      "source": "third_party/otc-llc",
+      "description": "Help create a passkey."
     }
   ]
 }
diff --git a/README.md b/README.md
index 9d46b46a2..c7d6a7768 100644
--- a/README.md
+++ b/README.md
@@ -120,6 +120,7 @@ Official Cursor plugins for popular developer tools, frameworks, and SaaS produc
 | `ringcentral-phone` | [RingCentral Phone](third_party/ringcentral-phone/) | Cursor | Integrations | Read call activity, AI call notes, SMS, voicemail, and fax, and send SMS. |
 | `ringcentral-chat` | [RingCentral Chat](third_party/ringcentral-chat/) | Cursor | Integrations | Read team chats and posts, send messages, and manage teams, tasks, and notes. |
 | `servicenow` | [ServiceNow](third_party/servicenow/) | Cursor | Integrations | Call the tools your admin publishes on a ServiceNow instance. |
+| `otc-llc` | [OTC](third_party/otc-llc/) | OTC LLC | Integrations | Help create a passkey. |
 Author values match each plugin’s `plugin.json` `author.name` (Cursor lists `plugins@cursor.com` in the manifest).
 
 ## Repository structure
diff --git a/third_party/otc-llc/.cursor-plugin/plugin.json b/third_party/otc-llc/.cursor-plugin/plugin.json
new file mode 100644
index 000000000..7d1b92a94
--- /dev/null
+++ b/third_party/otc-llc/.cursor-plugin/plugin.json
@@ -0,0 +1,29 @@
+{
+  "name": "otc-llc",
+  "displayName": "OTC",
+  "version": "1.0.0",
+  "description": "Help create a passkey.",
+  "author": {
+    "name": "OTC LLC",
+    "email": "ai@otc.network"
+  },
+  "homepage": "https://otc.network",
+  "repository": "https://github.com/cursor/plugins",
+  "license": "MIT",
+  "logo": "assets/logo.png",
+  "keywords": [
+    "otc",
+    "passkey",
+    "webauthn",
+    "authentication",
+    "mcp"
+  ],
+  "category": "integrations",
+  "tags": [
+    "otc",
+    "passkey",
+    "security",
+    "mcp"
+  ],
+  "mcpServers": "./mcp.json"
+}
diff --git a/third_party/otc-llc/README.md b/third_party/otc-llc/README.md
new file mode 100644
index 000000000..5749e2ff7
--- /dev/null
+++ b/third_party/otc-llc/README.md
@@ -0,0 +1,43 @@
+# OTC
+
+Cursor plugin that connects agents to [OTC](https://otc.network) through OTC's hosted [Model Context Protocol](https://modelcontextprotocol.io/) server.
+
+Help create a passkey.
+
+## Install
+
+1. Open **Cursor Settings → Plugins**.
+2. Search for **OTC**.
+3. Click **Install**, then complete any sign-in prompt the server shows.
+
+Or run `/add-plugin otc-llc` in chat.
+
+## MCP
+
+```json
+{
+  "mcpServers": {
+    "otc-llc": {
+      "type": "http",
+      "url": "https://otc.network/api/otc/mcp"
+    }
+  }
+}
+```
+
+The hosted runtime is the source of truth for tool names and schemas.
+
+## Try it
+
+Follow the passkey walkthrough at https://otc.network/passkey?section=passkey.
+
+## Docs
+
+- OTC: https://otc.network
+- Server URL: https://otc.network/api/otc/mcp
+
+Logo is OTC's theta mark from the verified `otc-ai` GitHub organization (contact `ai@otc.network`), 256×256. The submitted logo URL (`https://otc.network/otc-theta-favicon.svg`) could not be downloaded when this plugin was added.
+
+## License
+
+MIT
diff --git a/third_party/otc-llc/assets/logo.png b/third_party/otc-llc/assets/logo.png
new file mode 100644
index 000000000..0626b9bb4
Binary files /dev/null and b/third_party/otc-llc/assets/logo.png differ
diff --git a/third_party/otc-llc/mcp.json b/third_party/otc-llc/mcp.json
new file mode 100644
index 000000000..8f9bdf855
--- /dev/null
+++ b/third_party/otc-llc/mcp.json
@@ -0,0 +1,8 @@
+{
+  "mcpServers": {
+    "otc-llc": {
+      "type": "http",
+      "url": "https://otc.network/api/otc/mcp"
+    }
+  }
+}