Server error when added to VScode via MCP Servers Marketplace

[BarnoTD]

Describe the bug

MCP Server fails to start in VScode Chat pane customizations MCP servers whenever I try to start:
Output shows this:

2026-05-28 02:24:03.671 [info] Stopping server antfu/nuxt-mcp
2026-05-28 02:24:03.702 [info] Starting server antfu/nuxt-mcp
2026-05-28 02:24:03.702 [info] Connection state: Starting
2026-05-28 02:24:03.717 [info] Starting server from LocalProcess extension host
2026-05-28 02:24:03.718 [info] Connection state: Running
2026-05-28 02:24:03.805 [info] Connection state: Error Error sending message to https://mcp.nuxt.com/sse: TypeError: fetch failed

Note that it works when added manually following the documentation instructions. Issue only occurs when I try to add it automatically (screenshot below shows vscode automatically added mcp server not running, while the other one added with mcp.json is working)

Reproduction

Open VScode chat pane (secondary pane) > Gear icon (Open Customizations) > MCP Servers > Browse Marketplace > Add Nuxt.

System Info

System:
    OS: Windows 10 10.0.19045
    CPU: (8) x64 Intel(R) Core(TM) i7-7820HQ CPU @ 2.90GHz
    Memory: 17.45 GB / 31.81 GB
  Binaries:
    Node: 24.14.1 - C:\Program Files\nodejs\node.EXE
    npm: 11.11.0 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Edge: Chromium (145.0.3800.97)
    Internet Explorer: 11.0.19041.5794

Used Package Manager

npm

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Contributions

• I am willing to submit a PR to fix this issue
• I am willing to submit a PR with failing tests (actually just go ahead and do it, thanks!)