MCP Server

Active

MIT

Diagrams MCP Server MCP Server

io.github.mohammad-emad-dev/diagrams-mcp-server

Repository Registry

What is the Diagrams MCP Server MCP server?

Local-first MCP server for PlantUML and Mermaid diagrams with drift detection.

How to install Diagrams MCP Server

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

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.

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

{
  "mcpServers": {
    "diagrams-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "diagrams-mcp-server"
      ],
      "env": {
        "PROJECT_ROOT": "<YOUR_PROJECT_ROOT>",
        "DIAGRAMS_DIR": "<YOUR_DIAGRAMS_DIR>",
        "PLANTUML_SERVER_URL": "<YOUR_PLANTUML_SERVER_URL>",
        "ALLOW_REMOTE_PLANTUML": "<YOUR_ALLOW_REMOTE_PLANTUML>",
        "DISABLE_REMOTE_PLANTUML": "<YOUR_DISABLE_REMOTE_PLANTUML>"
      }
    }
  }
}

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