KosmoKrator

rendering

PlantUML MCP Integration for Claude Agent SDK

Connect PlantUML to Claude Agent SDK 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 PlantUML to Claude Agent SDK

Give Claude Agent SDK workflows access to KosmoKrator integrations through a local MCP server.

Add a KosmoKrator stdio MCP server to the Claude Agent SDK options. The gateway is local, scoped to this integration, and starts with --write=deny so Claude Agent SDK can inspect read-capable tools without receiving write access by default.

PlantUML MCP Config for Claude Agent SDK

Use a narrow integration list so the agent does not load unrelated tools.

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

Run the Gateway Manually

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

Why Use KosmoKrator Here

Scoped tools

Expose only PlantUML 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.

PlantUML Tools Visible to Claude Agent SDK

Claude Agent SDK sees stable MCP tool names generated from the PlantUML integration catalog.

MCP toolSource functionTypeDescription
integration__plantuml__render_plantuml plantuml.render_plantuml Write Render a PlantUML diagram to a PNG image. Pass valid PlantUML syntax and get back a markdown image embed. Supported diagram types: class, sequence, activity, component, state, use case, object, deployment, timing, network (nwdiag), wireframe (salt), Gantt, mindmap, WBS, JSON, YAML, ERD. Example syntax: ``` @startuml Alice -> Bob: Authentication Request Bob --> Alice: Authentication Response Alice -> Bob: Another request Bob --> Alice: Another response @enduml ``` Tips: - Always wrap syntax in @startuml / @enduml - Use `->` for solid arrows, `-->` for dashed arrows - Use `class ClassName { }` blocks for class diagrams - Use `(*) -->` for activity diagram start - Use `[Component]` for component diagrams - Use `state "Name" as s1` for state diagrams

Related PlantUML Pages

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