Claude Mermaid MCP server for Codex
MCP Server to previewing mermaid diagrams with live reload
How to install Claude Mermaid in Codex
Install check: Codex added its MCP server, but the command that server runs isn't installed in a clean setup. Install it first (see the README). (checked Oct 29, 2026, how we check)
Add it to Codex as an MCP server:
codex mcp add mermaid claude-mermaidCommand copied from the repo README (Codex's `codex mcp add` adds an MCP server to Codex). Check the README for any API key or setup it needs. Source: repo README.
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What it contains
Component list not published in a manifest we can read. See the repo README.
About this listing
Claude Mermaid is a community connector on GitHub by veelenga. Its README documents a Codex install and the repo documents a codex mcp add command. It passed the CodexStacks quality filter for repos found this way (at least 100 stars, pushed in the last 90 days, not a fork or a list). OpenAI hasn't reviewed it and we haven't install-checked it. It's one of 441 listings in the Developer Tools category (category assigned by CodexStacks from the repo's topics and description).
Claude Mermaid FAQ
How do I install Claude Mermaid in Codex?
Add it as an MCP server with codex mcp add mermaid claude-mermaid (copied from the repo README; check it for any API key or setup the server needs).
Is Claude Mermaid an official Codex connector?
No. Claude Mermaid is a community repo on GitHub by veelenga. It passed the CodexStacks quality filter, but OpenAI hasn't reviewed it and we haven't install-checked it, so read the code before you install it.
What does Claude Mermaid include?
Component list not published in a manifest we can read. See the repo README.
Details
- Type
- Connector
- Category
- Developer Tools (assigned by us)
- Source
- Community
- Author
- veelenga
- License
- MIT
- GitHub stars
- 220 (at last sync)
- Last push
- 2026-10-22
- GitHub topics
- claude-code, mcp-server
- Source
- https://github.com/veelenga/claude-mermaid
- Website
- https://veelenga.github.io/claude-mermaid/
- Listed via
- GitHub search: README documents a Codex install
- Install check by CodexStacks
- No badge: Codex added its MCP server, but the command that server runs isn't installed in a clean setup. Install it first (see the README). How we check
Something wrong or missing? Submit or improve this listing. Listings also refresh automatically every night.
For maintainers: badge and embeds
Maintain Claude Mermaid? Add the badge; it links to this page.
Markdown
[](https://codexstacks.com/p/claude-mermaid/)HTML
<a href="https://codexstacks.com/p/claude-mermaid/"><img src="https://codexstacks.com/badge.svg" alt="Listed on CodexStacks" width="172" height="28"></a>Embed card (static HTML and inline CSS, no JavaScript). Preview:
<a href="https://codexstacks.com/p/claude-mermaid/" style="display:block;max-width:380px;box-sizing:border-box;padding:14px 16px;border:1px solid #3a2c26;border-radius:12px;background:#0d0b0a;color:#f3ece6;font:14px/1.45 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;text-decoration:none"><span style="display:block;font-size:16px;font-weight:700;color:#f3ece6">Claude Mermaid</span><span style="display:block;margin:2px 0 8px;font-size:12px;color:#b5a9a1">Community Codex connector</span><span style="display:block;margin:0 0 10px;color:#ddd3cc">MCP Server to previewing mermaid diagrams with live reload</span><span style="font-size:12px;font-weight:600;color:#ffb347">View on CodexStacks →</span></a>Markdown summary
**[Claude Mermaid on CodexStacks](https://codexstacks.com/p/claude-mermaid/)**: Community Codex connector.More on badges, embeds and keeping your listing up to date: CodexStacks for plugin authors.
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