Hey, thanks for the detailed report. The CDN diagnostic failure is the key clue here.
The fact that publisher:"Anysphere" works but regular search doesn’t confirms the issue is specifically with CDN-routed requests. There’s a known pattern where certain ISPs or network-level filtering block or throttle cursor-cdn.com while the marketplace API itself marketplace.cursorapi.com works fine.
A couple of questions to narrow it down:
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What country or region are you connecting from? We’ve seen this exact pattern from Russia, where ISP-level deep packet inspection blocks CDN traffic. Similar resolved case here: Extenstions marketplace don't working
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When you say you tested with a VPN, which VPN provider and protocol did you use? Standard VPNs sometimes don’t help if the ISP uses advanced DPI. In the case linked above, a proxy protocol vless was needed to bypass it.
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Can you try opening
https://cursor-cdn.comdirectly in your browser and tell me if it loads?
In the meantime, as a workaround you can install extensions manually via VSIX:
- Download the VSIX from the VS Code marketplace API:
https://marketplace.visualstudio.com/_apis/public/gallery/publishers/{publisher}/vsextensions/{extension-name}/latest/vspackage
- In Cursor:
Ctrl+Shift+X> three dots menu > Install from VSIX > select the downloaded file.
Let me know your country and VPN setup. That’ll help confirm if this is a network filtering issue.