KosmoKrator

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Mermaid MCP Integration for Claude Code

Connect Mermaid to Claude Code through the local KosmoKrator MCP gateway with scoped tools, credentials, and write policy.

1 functions 0 read 1 write No credentials auth
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Connect Mermaid to Claude Code

Connect local KosmoKrator integrations to Claude Code through one scoped MCP gateway entry.

Add KosmoKrator as a stdio MCP server in the Claude Code project config and select the integrations that should be visible. The gateway is local, scoped to this integration, and starts with --write=deny so Claude Code can inspect read-capable tools without receiving write access by default.

Mermaid MCP Config for Claude Code

Claude Code can launch the local kosmo binary directly from the project MCP config.

{
  "mcpServers": {
    "kosmokrator-mermaid": {
      "type": "stdio",
      "command": "kosmo",
      "args": [
        "mcp:serve",
        "--integration=mermaid",
        "--write=deny"
      ]
    }
  }
}

Run the Gateway Manually

kosmokrator mcp:serve --integration=mermaid --write=deny

Why Use KosmoKrator Here

Scoped tools

Expose only Mermaid instead of a broad multi-service tool list.

Local credentials

Reuse credentials already configured for the KosmoKrator CLI and Lua runtime.

Write policy

Start read-only, then opt into ask or allow for trusted workspaces.

Mermaid Tools Visible to Claude Code

Claude Code sees stable MCP tool names generated from the Mermaid integration catalog.

MCP toolSource functionTypeDescription
integration__mermaid__render_mermaid mermaid.render_mermaid Write Render a Mermaid diagram to a PNG image. Pass valid Mermaid syntax and get back a markdown image embed. Supported diagram types: flowchart, sequence, class, state, ER, Gantt, pie, quadrant, requirement, git graph, C4, mindmap, timeline, sankey, XY chart, block. Example syntax: ``` graph TD A[Start] --> B{Decision} B -->|Yes| C[Action] B -->|No| D[End] ``` Tips: - Use `graph TD` for top-down flowcharts, `graph LR` for left-to-right - Use `sequenceDiagram` for sequence diagrams - Use `erDiagram` for entity-relationship diagrams - Use `classDiagram` for class diagrams - Use `stateDiagram-v2` for state diagrams - Use `gantt` for Gantt charts - Use `pie` for pie charts - Use `gitgraph` for git graphs - Use `mindmap` for mind maps

Related Mermaid Pages

Mermaid CLIUse direct JSON commands instead of MCP discovery. Mermaid MCPFull gateway reference and MCP tool names. KosmoKrator for Claude CodeClient-level gateway setup.