Where does the bug appear (feature/product)? Cursor CLI Describe the Bug IDEA 2025.3.3 AI Assistant using cursor agent chat with cursor, got error like “Failed to initialize ACP process. Process terminated with exit code: 1. Process output: Error: [unauthenticated] Error” Steps to Reproduce with…

Hey, thanks for the report. A couple of things to try: Use an API key instead of browser login The auth state from agent login doesn’t seem to persist correctly across terminal sessions on Windows. Try authenticating with an API key instead: Generate one in your Cursor dashboard under Integrati…

the methods you provided don’t work. may be same reson as this issue [image] ACP: permission rejection not reported to client Bug Reports Hey, thanks for the detailed repro. This is a great bug report. As I understand it, there are two issues: tool_call_up…

I see the suggested options didn’t help. Can you clarify a couple of things? When you tried using the API key, what exact error did you get? Was it the same [unauthenticated] Error? Did you try installing Cursor through JetBrains directly: AI Chat panel > agent provider list > Add Agent from R…

[image] deanrie: Did you try installing Cursor through JetBrains directly: AI Chat panel > agent provider list > Add Agent from Registry > search for “Cursor”? This is different from running agent acp manually in the terminal. [image]

[image] deanrie: Can you run agent --debug acp and share the full output? This should show at which step the auth flow breaks. PS C:\Users\Angww> AGENT --debug acp Error: [unauthenticated] Error PS C:\Users\Angww>

Hi, I had the same problem and for days I thought that was an IntelliJ bug. After some effort, I found in my env CURSOR_API_KEY because I used the CLI some months ago. With this property set, the error is the same that @wang_david reports, meanwhile removing it and logging in with the browser allo…

[image] Looks like I’m encountering a similar error.

[image] wang david: agent about [image] Looks like it failed to work with Opus 4.6

IDEA 2025.3.3 + Cursor acp doesn't work

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Yuanqi_Liu (Yuanqi Liu) April 9, 2026, 9:07am 16

Looks like it failed to work with Opus 4.6

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IDEA 2025.3.3 + Cursor acp doesn't work

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