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Best Diagram AI Skills & MCP Servers

23 curated Diagram skills and MCP servers — install any of them into Claude, Cursor, ChatGPT, n8n, or any AI stack with one command.

Vaults Diagram Tools

MCP Registry

Mermaid to assets. Source code to maps. MCP for agents.

MCP Registry · ★ 5.0free

Devtoolkit

MCP Registry

29 developer utilities as an MCP server — JSON repair, SQL format, hash, encode/decode, UUID, regex, CSV, subnet calc, diagram generation, git diff parsing, DB schema parsing, JSON schema validation, and more. No API keys. Runs locally.

MCP Registry · ★ 5.0free

Excalimaid

MCP Registry

Convert Mermaid diagrams to Excalidraw and open in browser. Includes MCP server for AI assistants.

MCP Registry · ★ 5.0free

Supacanvas

MCP Registry

The workspace for every dashboard, mockup, and diagram your AI tools build. Captured, searchable, exportable, yours forever. Works with Claude, Cursor, and any AI tool that speaks MCP.

MCP Registry · ★ 5.0free

Dgmo

MCP Registry

MCP server for rendering DGMO diagrams — SVG/PNG output, browser preview, HTML reports, and 35+ chart types. Works with Claude Desktop, Claude Code, and any MCP client.

MCP Registry · ★ 5.0free

Excalidraw Server

MCP Registry

Advanced MCP server for Excalidraw with real-time canvas, WebSocket sync, and comprehensive diagram management

MCP Registry · ★ 5.0free

Excalidraw Sentinel

MCP Registry

Hardened, self-hosted Excalidraw MCP server with SQLite persistence, multi-tenancy, auto-sync, security middleware, and 369 tests

MCP Registry · ★ 5.0free

Whiteboard

MCP Registry

MCP server + Excalidraw whiteboard UI for AI-assisted diagramming (Claude Code / Codex).

MCP Registry · ★ 5.0free

Claude Mermaid

MCP Registry

MCP server for previewing Mermaid diagrams in Claude Code

MCP Registry · ★ 5.0free

Mcp

MCP Registry

MCP server for Zindex - agent-native diagram state infrastructure. A thin HTTP client exposing tools (create, patch, validate, normalize, diff, render, list-revisions, get-scene, delete-scene, undelete-scene, list-recently-deleted, submit-to-support, publ

MCP Registry · ★ 5.0free

Server

MCP Registry

MCP server for Next AI Draw.io - AI-powered diagram generation with real-time browser preview

MCP Registry · ★ 5.0free

Brick Diagram

MCP Registry

Diagram generation — produce Mermaid, DOT/Graphviz, and ASCII diagrams from data.

MCP Registry · ★ 5.0free

Excalidraw

MCP Registry

Security-hardened MCP server for Excalidraw with API key auth, rate limiting, and real-time canvas sync

MCP Registry · ★ 5.0free

Fast Mermaid Validator

MCP Registry

High-performance API and Model Context Protocol (MCP) server for validating Mermaid diagrams with comprehensive security features, multiple transport options, and enterprise-grade capabilities

MCP Registry · ★ 5.0free

Mermaid

MCP Registry

A Model Context Protocol (MCP) server that converts Mermaid diagrams to PNG images

MCP Registry · ★ 5.0free

Embedded Editor For Claude Code

MCP Registry

Embedded visual workspace for Claude Code — Excalidraw diagrams (with MCP tools + inline PNG), tldraw canvases, and Markdown notes, all linked by wikilinks

MCP Registry · ★ 5.0free

Kroki

MCP Registry

A Model Context Protocol server for converting Mermaid diagrams to SVG using Kroki.io

MCP Registry · ★ 5.0free

Network Diagram

MCP Registry

Visual network topology editor with AI-agent MCP integration plus a cross-platform URL handler agent. Click any SSH / Postgres / Redis port on a node in NetMap (or any ssh:// / postgres:// / redis:// link in your OS) → picks your installed client (psql /

MCP Registry · ★ 5.0free

Mcp

MCP Registry

Official draw.io MCP server for LLMs - Open diagrams in draw.io editor

MCP Registry · ★ 5.0free

Plantuml

MCP Registry

MCP server for generating PlantUML diagrams

MCP Registry · ★ 5.0free

Mina

MCP Registry

MCP Server for interacting with Mina projects.

MCP Registry · ★ 5.0free

Mina Linux X64

MCP Registry

Linux x64 binary for @keadex/mina-mcp-server

MCP Registry · ★ 5.0free

Lucid

MCP Registry

Model Context Protocol (MCP) server for Lucid App integration with multimodal AI analysis

MCP Registry · ★ 5.0free

About Diagram skills on iClaude

iClaude is the universal install layer for AI skills. Every Diagram skill on this page can be installed into Claude Code, Claude Desktop, Cursor, ChatGPT, n8n, Codex, and more — using a single copy-paste command. No config drift, no per-stack adapters, no manual MCP wiring.