Where does the bug appear (feature/product)? Cursor IDE Describe the Bug Installation of pyrefly fails with the follow errors in the logs: 2026-03-05 11:14:19.044 [error] [Window] Failed: Server returned 503 at ZFu.queryRawGalleryExtensions (vscode-file://vscode-app/c:/Program%20Files/cursor/r…

Hey, this is a 503 from our extensions marketplace mirror. This can happen when an extension is brand new on Open VSX or hasn’t fully synced yet. A temporary workaround you can try right now: Go to Open VSX Registry and download the .vsix file for your platform In Cursor, open the Command Palette…

Hi @Max_Gardner , I’m from the Pyrefly team and would love feedback about the tool if you are able to get it working with cursor.

Manual install of pyrefly worked, and it is fast!

Should I disable Cursor Pyright completely now or just leave it with "cursorpyright.disableLanguageServices": true???

Sorry for the delay - I’ll wait for an authoritative answer from Cursor folks, but looking at other posts: Cursor Pyright automatically installed even I uninstall it you probably just want to update the settings.json mentioned in that post to disable, but not uninstall the Cursor Pyright extension a…

Interestingly enough, today it seems like go-to-ref stopped working with Pyrefly. Go-to-def still works, but not the reverse. Any ideas?

Can you try upgrading to the latest version (currently 0.58) and let me know if you still see the issue? Try putting a pyrefly.toml file in the root of your project workspace. If we can’t detect the project workspace root, then we can have trouble building the index that powers find references.

I updated to 0.58 and created the pyrefly.toml as you suggested. Find references is still not working. This was working fine about a week ago so I’m not sure what happened.

Cannot install pyrefly extension

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lolpack (Aaron) March 27, 2026, 9:06pm 9

Can you confirm which version of Pyrefly you are using?

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Cannot install pyrefly extension

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