MCP > Tools keep getting dropped and needing to be reloaded

Support Bug Reports
1

Every so often, MCP tools keep getting dropped and I have to reload them.
E.g. they turn red - when I turn on and off again they work.

I couldnt see much of any use in Output except what I got here.

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image1920×1327 225 KB

2

Hi there!

We detected that this may be a bug report, so we’ve moved your post to the Bug Reports category.

To help us investigate and fix this faster, could you edit your original post to include the details from the template below?

Bug Report Template - Click to expand

Where does the bug appear (feature/product)?

  • Cursor IDE
  • Cursor CLI
  • Background Agent (GitHub, Slack, Web, Linear)
  • BugBot
  • Somewhere else…

Describe the Bug
A clear and concise description of what the bug is.

Steps to Reproduce
How can you reproduce this bug? We have a much better chance at fixing issues if we can reproduce them!

  1. …
  2. …
  3. …

Expected Behavior
What is meant to happen here that isn’t working correctly?

Screenshots / Screen Recordings
If applicable, attach images or videos (.jpg, .png, .gif, .mp4, .mov)

Operating System

  • Windows 10/11
  • MacOS
  • Linux

Version Information

  • For Cursor IDE: Menu → About Cursor → Copy
  • For Cursor CLI: Run agent about in your terminal
IDE:
Version: 2.xx.x
VSCode Version: 1.105.1
Commit: ......

CLI:
CLI Version 2026.01.17-d239e66

For AI issues: which model did you use?
Model name (e.g., Sonnet 4, Tab…)

For AI issues: add Request ID with privacy disabled
Request ID: f9a7046a-279b-47e5-ab48-6e8dc12daba1
For Background Agent issues, also post the ID: bc-…

Additional Information
Add any other context about the problem here.

Does this stop you from using Cursor?

  • Yes - Cursor is unusable
  • Sometimes - I can sometimes use Cursor
  • No - Cursor works, but with this issue

The more details you provide, the easier it is for us to reproduce and fix the issue. Thanks!

4

Hey, thanks for the report.

This is a known MCP server stability issue, and the team is tracking it.

A few questions to narrow it down:

  1. What Cursor version are you on? (Menu > About Cursor > Copy)
  2. How often does this happen, every few minutes or more like once a day?
  3. Do all three servers drop at the same time, or separately one by one?
  4. Is there anything specific that seems to trigger it, like switching projects, being idle, or during agent tasks?

For now, one thing to try if you have not already is to check whether the MCP server processes are still running when the tools turn red. You can look for node processes in Activity Monitor. If they have exited, the server process is probably crashing. If they are still running, it is more likely a connection or reconnect issue on the Cursor side.

Let me know how it goes.

5

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