AI Plugin Index
Mermaid Validator MCP
Verified · npm:mermaid-validator-mcpMCP server by LF112 · updated · ★ 3 · 8 downloads a week
MCP server for validating Mermaid diagram syntax Mermaid Validator MCP is published by npm:mermaid-validator-mcp from its verified domain in the official MCP Registry.
Last commit 231 days ago
MIT: permissive, fine for commercial use
Published package or server URL, original repository
Not checked yet. What we check
Install Mermaid Validator MCP
Built from the published package, never by AIclaude mcp add mermaid-validator-mcp -- npx -y mermaid-validator-mcpRun in your terminal. Add --scope user to use it in every project.
{
"mcpServers": {
"mermaid-validator-mcp": {
"command": "npx",
"args": [
"-y",
"mermaid-validator-mcp"
]
}
}
}Settings, Developer, Edit config. Paste into claude_desktop_config.json and restart.
Step-by-step: install Mermaid Validator MCP in Claude Desktop
{
"mcpServers": {
"mermaid-validator-mcp": {
"command": "npx",
"args": [
"-y",
"mermaid-validator-mcp"
]
}
}
}Add to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).
{
"servers": {
"mermaid-validator-mcp": {
"command": "npx",
"args": [
"-y",
"mermaid-validator-mcp"
]
}
}
}Add to .vscode/mcp.json. VS Code uses "servers", not "mcpServers".
codex mcp add mermaid-validator-mcp -- npx -y mermaid-validator-mcp{
"mcpServers": {
"mermaid-validator-mcp": {
"command": "npx",
"args": [
"-y",
"mermaid-validator-mcp"
]
}
}
}Add to ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project).
Step-by-step: install Mermaid Validator MCP in Antigravity CLI
gemini mcp add mermaid-validator-mcp npx -y mermaid-validator-mcpGemini CLI was replaced by Antigravity CLI in June 2026 and remains only for enterprise licences and paid API keys.
MCP servers run with your permissions and can read what you give them access to. Some need an API key: check the README and add it under env in the mermaid-validator-mcp block.
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Mermaid Validator MCP: common questions
How do I install Mermaid Validator MCP?
In Claude Code run claude mcp add mermaid-validator-mcp -- npx -y mermaid-validator-mcp. For Claude Desktop, Cursor and VS Code, paste the config shown above and restart. See the install guides.
Is Mermaid Validator MCP the official server?
Mermaid Validator MCP is published by npm:mermaid-validator-mcp from its verified domain in the official MCP Registry.
Is Mermaid Validator MCP free?
The code is published under the MIT licence. The service it connects to may have its own pricing.
Is Mermaid Validator MCP safe to use?
It scores 36 of 100. Grades: maintenance D, licence A, quality D. The security check has not run for it yet. Review the code before you install. How grades work.
What are alternatives to Mermaid Validator MCP?
Similar MCP servers: GitDiagram, draw.io, Agent-Native Plan, Figma-Context-MCP.
Does Mermaid Validator MCP work with ChatGPT?
Not directly. It runs locally, and ChatGPT only connects to remote servers with a URL. Use it in Claude Code, Claude Desktop, Cursor, VS Code or Codex.