Can't install extension—Cursor repeatedly fetches "extensionquery"

Support Bug Reports
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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

I am trying to install Inspect AI - Visual Studio Marketplace

When I do so, Cursor hangs on “Installing” and the installation never finishes. When I open up Developer Tools and look at the network tab, I see that Cursor is repeatedly making POST requests to https://marketplace.cursorapi.com/_apis/public/gallery/extensionquery .

This extension installs fine in VSCode. It also installs fine on my coworker’s Cursor instance (not sure how his env is different).

Steps to Reproduce

Open the Extensions View, type “inspect-ai” in the search, install the first result.

Expected Behavior

It installs.

Screenshots / Screen Recordings

Screenshot 2026-01-14 at 5.45.41 PM.png
Screenshot 2026-01-14 at 5.45.41 PM.png2424×1340 421 KB

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.3.35
VSCode Version: 1.105.1
Commit: cf8353edc265f5e46b798bfb276861d0bf3bf120
Date: 2026-01-13T07:39:18.564Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 24.6.0

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

4 Likes
3

Hey, thanks for the report. This looks like a client-side bug, not a network issue.

I passed the info to the team to investigate. If you can, please check the “Response” tab in DevTools for one of those requests and paste it here. It’ll help us understand what exactly the server is returning.

4

Here’s the response from a randomly selected extensionquery query.

5

We are also facing similar issue for the Dbt Power User extension

6

Hi @deanrie

I’m following up on the cursor extension installation freeze issue. Do we have any updates or a tentative timeline for when a permanent fix will be released?

Thanks!

7

Any update?

8

Same problem when trying to install Open VSX Registry

9

I managed to install the package manually via f1 > “install from vsix”

10

Also facing this issue for ruff and meta pyrefly. Did anybody find a fix apart from manual vsix installation?

1 Like
11

Same for pyrefly for me. Ruff I can install

12

Came here because I’m experiencing the same issue for Ruff. I’d prefer not to manually install the vsix, especially since this seems like a Cursor bug.

I’ve seen other people with this issue resolve it by manually adding the extension to .cursor/extensions/extensions.json, but to do that you need to know what the extension entry already looks like.

1 Like
13

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