Diagram Guru MCP Server

Since AI can write code, it can also maintain structured architecture diagrams for your team. DiagramGuru is the MCP tool that lets AI agents create, update, and evolve your C4 architecture — automatically.

View on diagramguru.com

Documentation

System Design for Engineers

No More A.I. Slop In Your Repo

DiagramGuru is the system design platform where AI agents model, visualize, and evolve your C4 architecture. You approve the changes. Your team and AI Agents get the same visibility.

claude · diagram-guru mcp

$ Create a C4 architecture for our e-commerce platform with order processing, payments, and notifications

✓Created project: E-Commerce Platform

✓Added 6 entities to System Context

✓Added 5 relationships

✓Created Container drill-down (7 containers)

✓Created flow: Place Order (8 steps)

▶Creating flow: Browse Catalog...

System design shouldn't be a static artifact.

Most teams draw their architecture once, then guess their way through every change. Outdated diagrams lead to wrong assumptions, bad decisions, and costly rewrites. DiagramGuru makes system design a living, collaborative process — from first sketch to deployed system.

Everything Your Team Needs

Built for engineering teams that design, build, and evolve real systems.

AI-Powered Architecture Design

Describe your system in natural language. AI agents model C4 entities, relationships, and flows — from system context down to code level.

Visual C4 Workspace

Interactive diagram editor with 4-level drill-down. Navigate System Context to Containers to Components to Code — all in one canvas.

Flow Diagrams

Color-coded sequences that trace every request, event, and data path through your system. See how it behaves, not just how it's structured.

MCP-Native API

Every diagram is an MCP resource. Any AI agent can read, model, and evolve your architecture programmatically via the Model Context Protocol.

Share & Embed

Generate share links and iframe embeds. Share live architecture with your team, stakeholders, or embed directly in your internal docs.

Team & Access Control

Role-based access at org, team, and project level. Full audit log of every change. SSO and custom roles for Scale and Enterprise plans.

Flows

See How Your System Actually Works

Flows overlay your C4 diagrams with numbered, color-coded sequences that show exactly how data moves through your system for each use case — from placing an order to browsing a catalog.

How It Works

From a prompt to a modeled architecture in minutes.

01

Describe your system

Tell your AI agent what you're building — services, databases, queues, integrations. Natural language is all it takes to start modeling.

02

AI models the architecture

The agent creates entities, relationships, and flows via MCP. Your full C4 model — from Context to Code — takes shape in seconds.

03

Refine in the editor

Tweak layouts, update styles, drill into any level, add code-level details. The interactive canvas gives you full control over every element.

04

Share and export

Generate share links, iframe embeds, or Structurizr exports. Your architecture is ready to share with your team and build from.

Transparent pricing

Start designing free, upgrade when you grow.

MonthlyYearlySave ~17%

Free

Start modelling free. Perfect for small teams and solo developers.

$0/ forever

Limits

  • Editors1
  • Viewers3
  • Projects1
  • Teams1

Features

  • C4 Diagrams
  • MCP Integration
  • Flows
  • AI-Powered Design

Popular

Growth

Designed for teams that need to collaborate on complex, large-scale designs.

$39/ month

Limits

  • Editors5
  • Viewers15
  • Projects20
  • Teams3

Features

  • Everything in Free, plus:
  • Share Links
  • Audit Log
  • Email Support

Scale

Built for organizations to manage and scale design collaboration across multiple teams.

$149/ month

Limits

  • Editors20
  • Viewers100
  • Projects100
  • Teams20

Features

  • Everything in Growth, plus:
  • Domain Restriction
  • Priority Support

Enterprise

Custom solutions for large organizations with robust security and controls.

Custom

Limits

  • EditorsCustom
  • ViewersCustom
  • ProjectsCustom
  • TeamsCustom

Features

  • Everything in Scale, plus:
  • Custom Roles / Permissions
  • Dedicated Support

Contact Sales

Your AI Tools. Your Architecture. No Lock-in.

DiagramGuru works with any MCP-compatible agent — Claude, GPT, Codex, Copilot. Bring your existing AI subscriptions and API keys. Your agent connects through a standard MCP interface to read, model, and evolve your architecture. No separate per-token bill, no locked-in ecosystem.

MCP NativeBYOKClaudeCodexCopilotNo Lock-in