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How to connect Mermaid Chart MCP to Claude Cowork

Connect Claude Cowork to Mermaid Chart MCP. Validate checkout flow mermaid syntax, render deployment sequence diagram as svg, and more using natural language, with authentication handled for you.

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No Auth

Mermaid Chart MCP is a no-auth MCP server for validating Mermaid syntax and rendering diagrams as SVG. Use it to preview, zoom, and iterate on diagrams quickly without wiring up custom rendering code.

1 Tools

Introduction

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks.

This guide walks you through the easiest and most secure way to connect your Mermaid Chart account to Cowork via Composio Connect, enabling it to validate checkout flow Mermaid syntax, render deployment sequence diagram as SVG, preview user journey diagram interactively, and more such actions on your behalf without compromising your account security.

Also integrate Mermaid Chart MCP with

ChatGPT Work

Connecting Mermaid Chart to Claude Cowork

1. Open Customize

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

2. Add the Composio MCP server

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

3. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Cowork

4. Connect your Mermaid Chart account

Back in Cowork, ask the agent to connect to Mermaid Chart or give it any Mermaid Chart-related task.

For example, ask Cowork to:

  • "Validate checkout flow Mermaid syntax"
  • "Render deployment sequence diagram as SVG"
  • "Preview user journey diagram interactively"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your Mermaid Chart account is ready to use.

What is Claude Cowork?

Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools.

With Composio Connect, Cowork can securely access apps like Mermaid Chart through MCP without you sharing account credentials directly with the agent.

What is the Mermaid Chart MCP server, and what's possible with it?

The Mermaid Chart MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Mermaid Chart account. It provides structured and secure access so your agent can perform Mermaid Chart operations on your behalf.

TOOLS

Supported Tools

Every Mermaid Chart MCP action and event your agent gets out of the box.

Validate and render mermaid diagram

Use this tool to output a Mermaid diagram: - The tool will validate the diagram syntax and render it to a UI widget.

FRAMEWORKS

How to build Mermaid Chart MCP Agent with another framework

ChatGPT Work logo

ChatGPT Work

Use Mermaid Chart MCP with ChatGPT Work

FAQ

Frequently asked questions

With a standalone Mermaid Chart MCP server, the agents and LLMs can only access a fixed set of Mermaid Chart tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Mermaid Chart and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Mermaid Chart tools.

Yes, absolutely. You can configure which Mermaid Chart scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Mermaid Chart data and credentials are handled as safely as possible.

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