Cannot open MCP resource from agent mode

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

cannot open mcp resource from agent mode, but its work from editor mode

Steps to Reproduce

I’m using plugin attlasian, then try to open resource mcp and got error like in picture

Expected Behavior

it should can be open normal like editor mode

Screenshots / Screen Recordings

Operating System

MacOS

Version Information

Version: 3.7.42
VS Code Extension API: 1.105.1
Commit: 5702c9cfca656d8710fad58402fe37f14345e3a0
Date: 2026-06-15T19:39:42.738Z
Layout: glass
Build Type: Stable
Release Track: Default
Electron: 39.8.1
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
xterm.js: 6.1.0-beta.256
OS: Darwin arm64 25.5.0

Does this stop you from using Cursor

No - Cursor works, but with this issue

Hey, thanks for the report. I can see the screenshot with the toast Failed to open resource: ui://widget/openai/confluence-widget.html.

What’s happening here: resources like ui://widget/... are MCP App widgets (text/html;profile=mcp-app), not regular files. They’re meant to render inline in the chat after a tool call, not to be opened as a file in the editor. In the Glass agent window, trying to open this kind of resource fails, which is why you see that error. In the editor window, the open flow works differently right now, so it doesn’t crash there.

Important note: this doesn’t affect Atlassian (Jira/Confluence) tool calls themselves. Only the attempt to open the widget resource as a file is broken.

I’ve reported this internally. I can’t share an ETA yet, but I’ll post an update in the thread as soon as I have one.