Is Nr MCP Server safe to use?

Nr MCP Server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.

How do I install Nr MCP Server?

Nr MCP Server supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can Nr MCP Server do?

Nr MCP Server provides 13 tools: nr_get_flow_summary, nr_get_flow, nr_search_nodes, nr_get_function_code, nr_get_node_config and 8 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with Nr MCP Server?

Nr MCP Server is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.

Is Nr MCP Server actively maintained?

Nr MCP Server is less actively maintained — last commit was 114 days ago. It has 1 GitHub stars.

Nr MCP Server

nr-mcp

MCP server for Node-RED — safe deploy, optimistic locking, smart search, 13 tools

1 13 tools GitHub PyPI

No known CVEs

No license

Maintained

Last commit 114d ago

Works with most clients

Transport: stdio, http

13 tools · ~586 tok

Grade B · 0.3% of 200K ctx

Edit this pageView history

DevOps Developer Tools

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "nr-mcp": {
      "env": {
        "NR_URL": "http://localhost:1880",
        "NR_PASS": "your-password",
        "NR_USER": "admin"
      },
      "command": "nr-mcp"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-texan-nxtassist-nr-mcp)](https://mcppedia.org/s/io-github-texan-nxtassist-nr-mcp)

Read me

What Nr MCP Server does

A Model Context Protocol (MCP) server that lets AI assistants interact with Node-RED — read flows, search nodes, edit function code, deploy changes safely, and manage modules.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

uvx 'nr-mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

75/100across 5 weighted dimensions

How we score →

0255075100

−25

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked nr-mcp against OSV.dev.

Inventory

Tools (13)

Click any tool to inspect its schema.

~586 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is Nr MCP Server safe to use?: Nr MCP Server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install Nr MCP Server?: Nr MCP Server supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can Nr MCP Server do?: Nr MCP Server provides 13 tools: nr_get_flow_summary, nr_get_flow, nr_search_nodes, nr_get_function_code, nr_get_node_config and 8 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with Nr MCP Server?: Nr MCP Server is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.
Is Nr MCP Server actively maintained?: Nr MCP Server is less actively maintained — last commit was 114 days ago. It has 1 GitHub stars.

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Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

Edit this pageView history

DevOps Developer Tools

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "nr-mcp": {
      "env": {
        "NR_URL": "http://localhost:1880",
        "NR_PASS": "your-password",
        "NR_USER": "admin"
      },
      "command": "nr-mcp"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-texan-nxtassist-nr-mcp)](https://mcppedia.org/s/io-github-texan-nxtassist-nr-mcp)

Read me

What Nr MCP Server does

A Model Context Protocol (MCP) server that lets AI assistants interact with Node-RED — read flows, search nodes, edit function code, deploy changes safely, and manage modules.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

uvx 'nr-mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

README

nr-mcp

A Model Context Protocol (MCP) server that lets AI assistants interact with Node-RED — read flows, search nodes, edit function code, deploy changes safely, and manage modules.

Built to solve real problems: the existing Node-RED MCP implementations use PUT /flow/:id which reorders your tabs. nr-mcp uses the correct GET → POST /flows pattern with optimistic locking, so your tab order is always preserved.

Features

13 tools for complete Node-RED flow management:

Tool	Description
`nr_get_flow_summary`	Overview of all tabs with node counts and groups
`nr_get_flow`	Get a single tab with all nodes — by name or ID
`nr_search_nodes`	Search nodes by name, type, or JavaScript code content
`nr_get_function_code`	Extract full JS code from function nodes (incl. init/finalize)
`nr_get_node_config`	Full config with computed upstream/downstream connections
`nr_get_flow_context`	Read flow-level context variables
`nr_safe_deploy`	Deploy changes with optimistic locking — never reorders tabs
`nr_create_nodes`	Batch-create nodes/groups in a single deploy
`nr_delete_nodes`	Batch-delete with automatic wire and group cleanup
`nr_inject`	Trigger inject nodes remotely to test flows
`nr_get_installed_modules`	List installed modules and available node types
`nr_install_module`	Install npm packages from the Node-RED registry
`nr_get_debug_output`	Read debug/error data from flow context

Why not just use the existing MCP servers?

Tab reorder bug: Other implementations use PUT /flow/:id which silently reorders your tabs in Node-RED. nr-mcp uses the correct GET → POST /flows full-deploy pattern.
Optimistic locking: Every deploy checks the rev field. If someone else deployed between your read and write, you get a clear conflict error instead of silent data loss.
Smart search: Search across node names, types, function code, templates, and actions in one call.
Production-tested: Built and used daily for managing complex Node-RED installations (home automation, IoT, energy management).

Installation

Prerequisites

Python 3.11+
uv (recommended) or pip
Node-RED instance with Admin API enabled

Install from PyPI

pip install nr-mcp

Install with uv (recommended)

uv tool install nr-mcp

Or from source:

git clone https://github.com/Texan-NXTassist/nr-mcp.git
cd nr-mcp
uv tool install .

This creates the nr-mcp command in ~/.local/bin/.

Configuration

Environment variables

Variable	Required	Description
`NR_URL`	No	Node-RED URL (default: `http://localhost:1880`)
`NR_TOKEN`	No*	Bearer token for token-based auth
`NR_USER`	No*	Username for Basic Auth
`NR_PASS`	No*	Password for Basic Auth

* At least one auth method is recommended. Auth is checked in order: token → basic auth → no auth.

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "nr-mcp": {
      "command": "nr-mcp",
      "env": {
        "NR_URL": "http://localhost:1880",
        "NR_USER": "admin",
        "NR_PASS": "your-password"
      }
    }
  }
}

Tip: If you get a "working directory" error, create a wrapper script:
#!/bin/bash
cd /tmp
exec nr-mcp "$@"
Then point command to the wrapper path.

Cursor / VS Code

Add to your MCP settings (.cursor/mcp.json or VS Code equivalent):

{
  "mcpServers": {
    "nr-mcp": {
      "command": "nr-mcp",
      "env": {
        "NR_URL": "http://localhost:1880",
        "NR_TOKEN": "your-access-token"
      }
    }
  }
}

Usage examples

Once connected, you can ask your AI assi

... View full README on GitHub

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

75/100across 5 weighted dimensions

How we score →

0255075100

−25

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked nr-mcp against OSV.dev.

Inventory

Tools (13)

Click any tool to inspect its schema.

~586 tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is Nr MCP Server safe to use?: Nr MCP Server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install Nr MCP Server?: Nr MCP Server supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can Nr MCP Server do?: Nr MCP Server provides 13 tools: nr_get_flow_summary, nr_get_flow, nr_search_nodes, nr_get_function_code, nr_get_node_config and 8 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with Nr MCP Server?: Nr MCP Server is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.
Is Nr MCP Server actively maintained?: Nr MCP Server is less actively maintained — last commit was 114 days ago. It has 1 GitHub stars.