io.github.finfin/mermaid-mcp-app
mermaid-diagram
Is the io.github.finfin/mermaid-mcp-app MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-30.
MCP App that renders Mermaid diagrams as interactive UI in Claude, VS Code and other MCP clients
alive probed 2026-11-15 · unchanged since 2026-10-30
- Run it
- npx -y mermaid-mcp-app@0.3.2 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- mermaid-diagram 1.0.0
- Capabilities
- resources, tools
- Instructions
- none
- Of a 1M window
- <0.1 % of a 1M context window
- Count
- 324 tokens in Claude Opus 5.5, exact, measured 2026-10-16. With the Claude Code prefix mcp__…__ on each tool name: 339. The o200k_base estimate is 170. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/finfin/mermaid-mcp-app
- Registry
- active, updated 2026-03-22 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.91×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| render-mermaid | 324 | 170 | 100 % |
Compare this server with others.
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Servers that mention mermaid.
- AutEng MCP - Markdown Publishing & Document Share Links ai.auteng/mcp · alive
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- Line9 ai.line9/diagrams · alive
- ai.smithery/hustcc-mcp-mermaid · not found
- GitDiagram com.gitdiagram/gitdiagram · alive
- com.mermaidchart/mermaid-mcp · needs auth
- draw.io io.draw/mcp · alive
- Agentic Mermaid io.github.adewale/agentic-mermaid · alive
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.