Unable to add New Relic MCP to Automations

Support Bug Reports
,
1

When trying to set up a New Relic MCP connection for automations, I simply get this error that says “connection failed”. I’m able to use the same exact connection settings (URL and api-key header) in Cursor IDE and it works fine.

image

  • Bug happens only in Automations
  • When attempting to connect to New Relic MCP with details like the below, it gives a Connection Failed error
"url": "https://mcp.newrelic.com/mcp/",

"headers": {

"api-key": "NRAK-YOUR-API-KEY-HERE"

}

  • Steps to reproduce - create a new MCP connection to New Relic for Automations, add a valid api-key header, and attempt to add it to a new automation
  • Expected behavior is it connects
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

I’m also experiencing the same issue for the LogFire MCP. Even through the oauth version, it is not working. It is saying that there is a missing refresh token.

{ "mcpServers": { "logfire": { "type": "http", "url": " Pydantic Logfire " } } }

Screenshot 2026-03-12 at 9.09.36 AM
Screenshot 2026-03-12 at 9.09.36 AM1862×250 17 KB

5

Hey, this is a known issue. MCP connections via Automations are unstable right now. We’re seeing similar reports with other providers like Sentry, Datadog, and LogFire.

The team is aware. There’s no ETA yet, but your reports help us prioritize.

@c2keesey same situation with LogFire, we’re tracking it.

I’ll post here when there are updates.

10

Hey @Kyle_Holgate,
Just checking in — are you still seeing the “fetch failed” error when adding MCP servers to Automations? This was recently addressed, and updating to the latest version should resolve it. Let me know if you’re still running into it!

cc @c2keesey

11

I’m unable to add the Datadog plugin to Automations for the same reason, and now it just refuses to add the plugin to the Automation. It worked for a couple of days, now the automations refuse to acknwledge adding it. Has there been any fixes or updates on this?

12

Hey, the original issue in that thread fetch failed / connection failed when adding MCP was fixed back in April. What you’re describing, the plugin worked for a while and now Automation won’t confirm the add, sounds like a different symptom, so let’s treat it as a new case.

To avoid mixing it up with the already closed bug, please start a new thread and include:

  • Where exactly you’re adding Datadog, in the IDE or in the web dashboard at cursor.com/automations
  • A screenshot showing the exact text/state, stuck on Installing, an error, or it just doesn’t get added with no message
  • Your Cursor version
  • How you’re adding Datadog, via a marketplace plugin or a custom MCP, JSON with url and headers
  • Roughly when it stopped working

With those details we can link your case to the right issue. A similar symptom, plugin installs but doesn’t show up in the tools list, is already on our radar, but I want to confirm it’s the same thing and not something else.