diff --git a/specs.json b/specs.json
index 76c90ac..c20a6bd 100644
--- a/specs.json
+++ b/specs.json
@@ -443,6 +443,7 @@
       "model": "string",
       "auth": "object",
       "connectOptions": "object",
+      "mcpServers": ["#mcpServer"],
       "actionHook": "object|string",
       "eventHook": "object|string",
       "toolHook": "object|string",
@@ -455,6 +456,16 @@
       "llmOptions"
     ]
   },
+  "mcpServer": {
+    "properties": {
+      "url": "string",
+      "auth": "object",
+      "roots": ["#root"]
+    },
+    "required": [
+      "url"
+    ]
+  },
   "message": {
     "properties": {
       "id": "string",
diff --git a/test/jambonz-verb-test.js b/test/jambonz-verb-test.js
index 36feed9..b838f48 100644
--- a/test/jambonz-verb-test.js
+++ b/test/jambonz-verb-test.js
@@ -522,6 +522,26 @@ test("validate correct verbs", async (t) => {
       },
       "dual_streams": true,
       "timeLimit" : 10
+    },
+    {
+      "verb": "llm",
+      "vendor": 'ultravox',
+      "model": 'fixie-ai/ultravox',
+      "auth": {
+        "apiKey": "sk-1234567890abcdefg"
+      },
+      "llmOptions": {
+        "firstSpeaker": 'FIRST_SPEAKER_AGENT',
+      },
+      "mcpServers": [
+        {
+          "url": 'https://mcp.example.com',
+          "auth": {
+            "username": 'username',
+            "password": 'password'
+          }
+        }
+      ]
     }
   ];
   try {