Diagrams MCP Server

Diagrams MCP Server is an MCP integration. Local-first MCP server for PlantUML and Mermaid diagrams with drift detection.

Packages and local setup

The published npm package is diagrams-mcp-server, version 0.5.2. Its declared MCP transport is stdio.

The package declares 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..

Before connecting

Check the maintainer’s instructions for account access, authentication and the supported client configuration. Once connected, inspect the tools your client receives and try a small task that matches the server’s stated purpose. The registry description does not include a verified, complete tool list.

Project and source

View the publisher’s registry entry · Project repository · Project website. This profile uses version 0.5.2 from the registry. Registration identifies the publisher namespace; it does not establish that this is a first-party integration for every service it connects.

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