From 2903c3a023a6b9ad4079adcab23b67cfdea21a50 Mon Sep 17 00:00:00 2001
From: Anton Pidkuiko MacBook <antonp@anthropic.com>
Date: Wed, 14 Jan 2026 20:09:04 +0000
Subject: [PATCH] fix: update MCP Apps to use new _meta.ui.resourceUri format

- Update @modelcontextprotocol/ext-apps to 0.4.0
- Use new nested format `_meta.ui.resourceUri` in tool definition
- Remove resourceUri from tool result (only needed in tool definition)
- Add example structuredContent and _meta in tool result for demo
---
 package.json                    |  2 +-
 src/modules/mcp/services/mcp.ts | 17 ++++++++++++++---
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/package.json b/package.json
index 10e4d5a..1ce20f2 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "clean": "rm -rf dist"
   },
   "dependencies": {
-    "@modelcontextprotocol/ext-apps": "https://pkg.pr.new/modelcontextprotocol/ext-apps/@modelcontextprotocol/ext-apps@95663d4",
+    "@modelcontextprotocol/ext-apps": "^0.4.0",
     "@modelcontextprotocol/sdk": "^1.24.2",
     "@redis/client": "^1.6.0",
     "cors": "^2.8.5",
diff --git a/src/modules/mcp/services/mcp.ts b/src/modules/mcp/services/mcp.ts
index b697f7d..ec74fe4 100644
--- a/src/modules/mcp/services/mcp.ts
+++ b/src/modules/mcp/services/mcp.ts
@@ -96,7 +96,6 @@ enum ToolName {
 }
 
 // MCP Apps constants
-const RESOURCE_URI_META_KEY = "ui/resourceUri";
 const HELLO_WORLD_APP_URI = "ui://hello-world/app.html";
 
 enum PromptName {
@@ -492,7 +491,7 @@ export const createMcpServer = (): McpServerWrapper => {
         description:
           "Demonstrates MCP Apps - returns an interactive UI that runs in the client",
         inputSchema: { type: "object", properties: {} },
-        _meta: { [RESOURCE_URI_META_KEY]: HELLO_WORLD_APP_URI },
+        _meta: { ui: { resourceUri: HELLO_WORLD_APP_URI } },
       },
     ];
 
@@ -767,7 +766,19 @@ export const createMcpServer = (): McpServerWrapper => {
             text: "If this client supports MCP Apps, an interactive UI should have rendered for the user.",
           },
         ],
-        _meta: { [RESOURCE_URI_META_KEY]: HELLO_WORLD_APP_URI },
+        structuredContent: {
+          greeting: "Hello from MCP Apps!",
+          timestamp: new Date().toISOString(),
+          features: ["interactive UI", "bidirectional communication", "theme support"],
+          stats: {
+            version: "1.0.0",
+            requestCount: Math.floor(Math.random() * 1000),
+          },
+        },
+        _meta: {
+          exampleKey: "exampleValue",
+          processed: true,
+        },
       };
     }