How to install Claude Mermaid in Claude Code
To install Claude Mermaid in Claude Code, run "claude mcp add claude-mermaid -- npx -y claude-mermaid" in your terminal, then check it with "claude mcp list". It takes about a minute.
Built from the published package · server updated 2 days ago
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Run the install command
Open a terminal in your project and run:
claude mcp add claude-mermaid -- npx -y claude-mermaid - 2
Choose where it applies (optional)
Add --scope user to use it in every project, or --scope project to share it with your team through a .mcp.json file.
claude mcp add --scope user claude-mermaid -- npx -y claude-mermaid - 3
Check that it is connected
List your servers, or type /mcp inside a Claude Code session to see its status and tools.
claude mcp list
MCP servers run with your permissions. If Claude Mermaid needs an API key, add it under env in the config. Check its README.
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Questions
Does Claude Mermaid work in Claude Code?
Yes. Claude Code supports mcp servers (local and remote), skills and plugins, and Claude Mermaid installs with the steps above.
Claude Mermaid does not show up in Claude Code. What now?
Restart Claude Code fully, check the JSON is valid, and make sure Node.js (for npx) is installed. See common MCP errors and fixes.
Is Claude Mermaid safe?
It scores 78 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.
