Koskamo

mermaid-mcp-app

An MCP application that renders Mermaid diagrams in an interactive viewer with pan, zoom, and a built-in source editor. It allows users to edit diagrams directly in a split-view editor and send the updated source back to the LLM to continue the conversation. It supports 13 diagram types including flowcharts, sequence diagrams, and class diagrams, and works in Claude Desktop, VS Code, and any MCP-App-compatible host.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

mermaid-mcp-app logo, by finfinCommunity listingLocal stdioSource reviewed; not executedPublished by finfin
Vendor documentation

What you can do with it

  • Draw a flowchart showing user authentication flow
  • Create a sequence diagram for an API request lifecycle
  • Render a mermaid diagram with explicit theme
  • Edit diagram source directly in the split-view editor

Source and maintenance

Community listingRegistry 0.3.2
mcp-registry: io.github.finfin/mermaid-mcp-app@0.3.2Source repository
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

mermaid-mcp-app 0.3.2

npm
mermaid-mcp-app package definition
{
  "version": "0.3.2",
  "transport": "stdio",
  "identifier": "mermaid-mcp-app",
  "registryType": "npm"
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "mermaid-mcp-app": {
      "command": "npx",
      "args": [
        "-y",
        "mermaid-mcp-app@0.3.2"
      ]
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "mermaid-mcp-app": {
      "command": "npx",
      "args": [
        "-y",
        "mermaid-mcp-app@0.3.2"
      ]
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "mermaid-mcp-app": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "mermaid-mcp-app@0.3.2"
      ]
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "mermaid-mcp-app": {
      "command": "npx",
      "args": [
        "-y",
        "mermaid-mcp-app@0.3.2"
      ]
    }
  }
}

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