How do I install the mcp mermaid mcp server?

Run it through your MCP client's configuration using `npx -y mcp-mermaid`. Add the server block to Claude Desktop's config file (or use `claude mcp add` for Claude Code), restart the client, and the tools appear automatically. Full snippets are on this page.

Does the mcp mermaid mcp server need an API key?

No API key is documented for this server, so it should start without additional credentials. Because it runs locally, it inherits whatever access your machine already has — worth keeping in mind when you decide what to point it at.

MCP Mermaid MCP Server — Install Guide & Tools

What is the MCP Mermaid MCP server?

Mcp mermaid mcp server lets Claude, Cursor and other MCP clients work with MCP Mermaid directly. ❤️ Generate mermaid diagram and chart with AI MCP dynamically.

What MCP Mermaid does

Generate mermaid diagram and chart with AI MCP dynamically. Also you can use:

Tools it exposes

Once connected, the assistant can call these 2 tools directly:

SSE — http://localhost:3033/sse
Streamable — http://localhost:1122/mcp

Installing the mcp mermaid mcp server

The server is distributed via npm as mcp-mermaid, so most clients can run it without a manual build step. Add it to your MCP client's configuration and restart the client to pick it up — the copy-paste configs for Claude Desktop, Claude Code and Cursor are on this page.

Where it fits

Developer-tool servers are usually the first ones people connect, because they turn "help me with this code" into an assistant that can actually read the repo and act on it. MCP Mermaid sits in that group, and the shape of its toolset — SSE, Streamable — tells you what it is really for. Worth comparing against the other developer tools servers in this directory before you commit to one, since several overlap in scope but differ sharply in setup cost and permissions.

Practical notes

This server runs locally, so it operates with whatever access your machine and its credentials already have. Scope that deliberately rather than by default.
Maintained by hustcc.
MCP clients ask for confirmation before each tool call by default. Keep that on while you learn what the mcp mermaid mcp server actually does with your data.
Every entry in this directory is reviewed by hand before it goes live, and details are checked against the project's own documentation.

Available tools

Tool	What it does
SSE	http://localhost:3033/sse
Streamable	http://localhost:1122/mcp

How to install the MCP Mermaid MCP server

{
  "mcpServers": {
    "mcp-mermaid": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-mermaid"
      ]
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Example prompts to try

“Use MCP Mermaid to SSE.”
“Use MCP Mermaid to Streamable.”

Frequently asked questions

It connects MCP Mermaid to MCP-compatible AI assistants such as Claude and Cursor, exposing 2 tools (SSE, Streamable) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with MCP Mermaid directly.

MCP Mermaid MCP Server

What is the MCP Mermaid MCP server?

What MCP Mermaid does

Tools it exposes

Installing the mcp mermaid mcp server

Where it fits

Practical notes

Available tools

How to install the MCP Mermaid MCP server

Example prompts to try

Frequently asked questions

Alternatives to the MCP Mermaid MCP server

Context7

Playwright

GitHub

Linear

Git

Time

MCP Mermaid MCP Server

What is the MCP Mermaid MCP server?

What MCP Mermaid does

Tools it exposes

Installing the mcp mermaid mcp server

Where it fits

Practical notes

Available tools

How to install the MCP Mermaid MCP server

Example prompts to try

Frequently asked questions

What does the mcp mermaid mcp server do?

How do I install the mcp mermaid mcp server?

Does the mcp mermaid mcp server need an API key?

Alternatives to the MCP Mermaid MCP server

Context7

Playwright

GitHub

Linear

Git

Time