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Nr MCP Server

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

Local serverstdioPython

What is the Nr MCP Server?

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

The short version

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.

What it needs from you

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

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

How to install the Nr MCP Server

{
  "mcpServers": {
    "nr": {
      "command": "uvx",
      "args": ["nr-mcp"],
      "env": {
        "NR_URL": "your-value",
        "NR_USER": "your-value",
        "NR_PASS": "your-value",
        "NR_TOKEN": "your-value"
      }
    }
  }
}

Add to claude_desktop_config.json, then restart Claude Desktop.

Configuration

  • Python 3.11+ - uv (recommended) or pip - Node-RED instance with Admin API enabled
VariableDescriptionRequired
NR_URLEndpoint or connection string the server talks to.Yes
NR_USERConfiguration value read at startup.Optional
NR_PASSConfiguration value read at startup.Optional
NR_TOKENCredential the server authenticates with.Yes

Example prompts to try

  • “Use Nr to Prerequisites.”

Frequently asked questions

MCP server for Node-RED — safe deploy, optimistic locking, smart search, 13 tools Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.

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