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Mermaid Validator Extended

Verified Integration
Author: @pakkinlau•Category: ServerApplication
GitHub Repository
JSON-RPC 2.0
Protocol Standard
Sub-second
Execution Latency
Active
Operational Status
Tags:#Claude#Search#Database#API#Git#AI#GitHub#Node.js

Client Configuration

— Connect Mermaid Validator Extended to Claude Desktop or Cursor in seconds
{
  "mcpServers": {
    "mermaid-validator-extended": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mermaid-validator-extended"
      ],
      "env": {}
    }
  }
}
Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).
Architecture & Capabilities

System Overview

Validates and renders Mermaid diagrams for use with LLMs, incorporating an essential fix for WSL stdin.

Indexed Date

7/23/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Mermaid Validator Extended

For valid Mermaid diagrams, the tool generates a base64-encoded PNG image. This format is chosen for its broad compatibility with most MCP clients, ensuring seamless display and integration.

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