Claude Mermaid MCP Server
by veelengaMCP Server to previewing mermaid diagrams with live reload
Claude Mermaid is an open-source mcp server by veelenga, written mainly in TypeScript, with 221 GitHub stars and the MIT license. Its code was last updated Oct 30, 2026. The latest npm release is claude-mermaid 1.7.0, published Oct 22, 2026, with 818 downloads last week.
Scan summary: scanned Nov 5, 2026 at commit 54666e0. Seen able to connect to the internet. Scan policy
What Claude Mermaid can touch
- Our checks did not find this. The tool may still do it.Run shell commandsNot seen in this scan
- Our checks did not find this. The tool may still do it.Run dynamic codeNot seen in this scan
- Our checks did not find this. The tool may still do it.Read or write filesNot seen in this scan
- Our checks did not find this. The tool may still do it.Read environment and secretsNot seen in this scan
- Our checks did not find this. The tool may still do it.Control a web browserNot seen in this scan
- Our checks did not find this. The tool may still do it.Connect to databasesNot seen in this scan
- Our checks did not find this. The tool may still do it.Read or send messagesNot seen in this scan
- Our checks did not find this. The tool may still do it.Touch money or tradingNot seen in this scan
- Seen in this scan, either in the code or while it ran.Connect to the internetFound in the code by our scan
"Not seen" means our checks did not find it, and the tool may still do it. Covers commit 54666e0, Nov 5, 2026. See the scan policy.
Before you install Claude Mermaid
AgenticMart scanned Claude Mermaid on Nov 5, 2026 with automated checks for hidden code, known-malicious packages, leaked secrets and vulnerable dependencies. The result covers one commit under our scan policy, so review what access you give it and check any advisories shown here.
What it can access
- An MCP server is a program your AI app starts and talks to. A local one runs with your user's permissions: it can see the files, environment variables and network your account can.
Before you install
- Pin the version you reviewed instead of always installing the latest release.
- Read the tool list or scripts before the first run, and keep approval prompts on for actions that write, send or delete.
- Maintained by veelenga on GitHub, 221 stars and 26 forks. Popularity is not proof of safety.
- Last code change: Oct 30, 2026.
- Open-source license: MIT.
Tools Claude Mermaid exposes (2)
Listed by the server itself during our scan of commit 54666e0.
mermaid_previewRender a Mermaid diagram and open it in browser with live reload. Takes Mermaid diagram code as input and generates a live preview. Supports themes (default, forest, dark, neutral), custom backgrounds, dimensions, and quality scaling. The diagram will auto-refresh when updated. Use mermaid_save to s
mermaid_saveSave the current live Mermaid diagram to a file path. This copies the already-rendered diagram from the live preview to the specified location. Use this after tuning your diagram with mermaid_preview.
Claude Mermaid is an open-source mcp server by veelenga, written mainly in TypeScript. MCP Server to previewing mermaid diagrams with live reload
At a glance
- Stars
- 221
- Forks
- 26
- Language
- TypeScript
- License
- MIT
- Created
- Sep 2025
- Last update
- Oct 30, 2026
- Type
- MCP Server
- Price
- Free
Topics
Questions about Claude Mermaid
What is Claude Mermaid?
MCP Server to previewing mermaid diagrams with live reload
Who maintains Claude Mermaid?
Claude Mermaid is maintained by veelenga on GitHub (veelenga/claude-mermaid). AgenticMart lists it from public repository data.
Is Claude Mermaid safe to use?
AgenticMart scanned Claude Mermaid on Nov 5, 2026 with automated checks for hidden code, known-malicious packages, leaked secrets and vulnerable dependencies. The result covers one commit under our scan policy, so review what access you give it and check any advisories shown here.
What license does Claude Mermaid use?
It is published under the MIT license.
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