plantuml-mcp-server

[](https://smithery.ai/server/@infobip/plantuml-mcp-server)

A Model Context Protocol (MCP) server that provides PlantUML diagram generation capabilities for Claude Desktop and Claude Code.

1. `generate_plantuml_diagram` - Generate diagrams and get embeddable URLs (SVG/PNG), optionally save locally
2. `encode_plantuml` - Encode PlantUML code for URL sharing
3. `decode_plantuml` - Decode PlantUML from encoded strings

1. `plantuml_error_handling` - Guidelines for handling PlantUML syntax errors and implementing auto-fix workflows

This prompt provides Claude instances with comprehensive instructions on how to:

• Detect PlantUML syntax errors using native server validation
• Implement intelligent auto-fix workflows for common syntax issues
• Parse structured error responses and apply appropriate corrections
• Handle validation failures gracefully with retry logic

The prompt enables Claude to automatically detect and fix common PlantUML errors like missing tags, invalid arrow syntax, typos in keywords, and missing quotes, making PlantUML diagram generation more reliable and user-friendly.

# Using default PlantUML server
claude mcp add plantuml --scope user --env PLANTUML_SERVER_URL=https://www.plantuml.com/plantuml -- npx plantuml-mcp-server

Add this to your Claude Desktop MCP configuration (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "plantuml": {
      "command": "npx",
      "args": ["plantuml-mcp-server"],
      "env": {
        "PLANTUML_SERVER_URL": "https://www.plantuml.com/plantuml"
      }
    }
  }
}

To use your own PlantUML server, change the PLANTUML_SERVER_URL environment variable.

Then restart Claude Desktop/Code to a