Diagrams MCP Server

What the code does

We read the source, 2 d ago · rules 995398eba69f

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

    : path.join(projectRoot, diagramsDirSetting);

    const checker = spawn(process.platform === "win32" ? "where" : "which", [cmd]);

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Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add diagrams-mcp-server -- npx -y diagrams-mcp-server

{
  "mcpServers": {
    "diagrams-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "diagrams-mcp-server"
      ]
    }
  }
}

[mcp_servers.diagrams-mcp-server]
command = "npx"
args = ["-y", "diagrams-mcp-server"]

{
  "mcpServers": {
    "diagrams-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "diagrams-mcp-server"
      ]
    }
  }
}

{
  "servers": {
    "diagrams-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "diagrams-mcp-server"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: PROJECT_ROOT (Project root to attach to (defaults to the working directory)), DIAGRAMS_DIR (Diagrams directory, relative to PROJECT_ROOT unless absolute (default: diagrams)), PLANTUML_SERVER_URL (Override for the opt-in remote PlantUML fallback), ALLOW_REMOTE_PLANTUML (Set to true to allow the remote PlantUML fallback when no local CLI is installed), DISABLE_REMOTE_PLANTUML (Set to true to always disable the remote PlantUML fallback).