MCP Integration with n8n not loading

[HIGUCHI_TAKAFUMI]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

1. Set up the environment: Windows 11, Node.js v22.17.0.
2. Install the MCP server package globally: npm install -g @leonardsellem/n8n-mcp-server
3. Create the following mcp.json file in the C:\Users\hmhas\.cursor directory:

{
“mcpServers”: {
“n8n”: {
“command”: “node”,
“args”: [
“C:/Users/hmhas/AppData/Roaming/npm/node_modules/@leonardsellem/n8n-mcp-server/build/index.js”
],
“env”: {
“N8N_API_KEY”: “YOUR_API_KEY_HERE”,
“N8N_BASE_URL”: “https://n8n.srv1002241.hstgr.cloud”
}
}
}
}

4. Completely restart the Cursor application.
5. Open any folder.
6. Open the Command Palette (Ctrl+Shift+P).
7. Type “claude” or “n8n” in the palette.

Steps to Reproduce

The Command Palette should show commands related to the loaded n8n MCP server, such as “Claude: Restart Claude”. The AI chat should be able to connect to the n8n server defined in mcp.json.

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.7.28 (user setup)
VSCode Version: 1.99.3
Commit: adb0f9e3e4f184bba7f3fa6dbfd72ad0ebb8cfd0
Date: 2025-10-01T02:45:21.769Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.26100

Does this stop you from using Cursor

No - Cursor works, but with this issue

[sanjeed5]

Thanks for reporting this!

MCP tools don’t appear in the Command Palette - they show up the agent and are automatically used by the Agent when relevant to your requests.

To verify your n8n MCP server is loaded correctly:

1. Open Cursor Settings → Tools & MCP

   • Is your “n8n” server showing as green (connected) or red (error)?

2. Check the logs: View → Output, then select your n8n MCP server from the dropdown

   • Share any error messages you see

Let me know what you find in settings/logs!

[HIGUCHI_TAKAFUMI]

Hi, as requested by support, I checked the logs from “View” → “Output” → “MCP: user-n8n”. It shows a repeating “[error] No server info found”. It seems the mcp.json file is not being read correctly, even though it is in the correct location and the content is valid.

2025年10月6日(月) 23:20 Sanjeed via Cursor - Community Forum <[email protected]>:

[sanjeed5]

Can you check the Settings too?
Open Cursor Settings → Tools & MCP

• Is your “n8n” server showing as green (connected) or red (error)?

[HIGUCHI_TAKAFUMI]

Hi please check below text again

Hi, as requested by support, I checked the logs from “View” → “Output” → “MCP: user-n8n”. It shows a repeating “[error] No server info found”. It seems the mcp.json file is not being read correctly, even though it is in the correct location and the content is valid.

2025年10月7日(火) 21:17 Sanjeed via Cursor - Community Forum <[email protected]>:

[deanrie]

It looks like your image is broken. Could you also let me know where your mcp.json file is located? There might be a syntax error in it.

[HIGUCHI_TAKAFUMI]

code: 1001,
data: undefined
}

2025-10-08 11:12:36.213 [info] Client closed for command
2025-10-08 11:12:36.528 [info] Handling ListOfferings action, server stored: false
2025-10-08 11:12:36.528 [error] No server info found
2025-10-08 11:12:36.530 [info] Handling ListOfferings action, server stored: false
2025-10-08 11:12:36.530 [error] No server info found
2025-10-08 11:12:36.531 [info] Handling ListOfferings action, server stored: false
2025-10-08 11:12:36.531 [error] No server info found

2025年10月8日(水) 0:42 Dean Rie via Cursor - Community Forum <[email protected]>:

[HIGUCHI_TAKAFUMI]

Please check the attached error again.

2025年10月8日(水) 0:42 Dean Rie via Cursor - Community Forum <[email protected]>:

(attachments)

code errer1001,.txt (507 Bytes)

[HIGUCHI_TAKAFUMI]

Since then, have you had any progress regarding this error?

Thanks,
HIGUCHI TAKAFUMI

2025年10月9日(木) 13:45 HIGUCHI TAKAFUMI <[email protected]>:

[sanjeed5]

Thanks for your patience! Let’s isolate whether this is a Cursor issue or specific to the n8n MCP server.

First, please test if MCP works at all with Cursor:

1. Try installing any simple MCP server from the Cursor MCP directory

2. Check if that server appears and works in Settings → Tools & MCP

If other MCP servers work:

• The issue is likely with the n8n-mcp-server configuration or the server itself

• Double-check your environment variables match what the n8n-mcp-server repo requires (it showsN8N_API_URL)

• If still broken, please open an issue on the n8n-mcp-server GitHub with your config (redact your API key) and error logs

If no MCP servers work:

• This indicates a broader Cursor MCP issue on your system

Let me know what you find!