Diagrams.so MCP Server

by redholdio.github.RedHold/diagrams-so-mcpv1.4.6

Generate and edit draw.io cloud architecture diagrams from prompts, Terraform or Kubernetes manifests, fix Well-Architected warnings and export to SVG.

0Node.jsstdioofficial registry

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Maintained52d ago

Install Diagrams.so MCP server

claude mcp add diagrams-so -e DIAGRAMS_API_KEY='<diagrams-api-key>' -- npx -y @diagrams-so/mcp

{
  "mcpServers": {
    "diagrams-so": {
      "command": "npx",
      "args": [
        "-y",
        "@diagrams-so/mcp"
      ],
      "env": {
        "DIAGRAMS_API_KEY": "<diagrams-api-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "diagrams-so": {
      "command": "npx",
      "args": [
        "-y",
        "@diagrams-so/mcp"
      ],
      "env": {
        "DIAGRAMS_API_KEY": "<diagrams-api-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "diagrams-so": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@diagrams-so/mcp"
      ],
      "env": {
        "DIAGRAMS_API_KEY": "<diagrams-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "diagrams-so": {
      "command": "npx",
      "args": [
        "-y",
        "@diagrams-so/mcp"
      ],
      "env": {
        "DIAGRAMS_API_KEY": "<diagrams-api-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
DIAGRAMS_API_KEY	—	yes	Diagrams.so API key (dgz_live_... or dgz_test_...). Optional since 1.4.0: run `npx @diagrams-so/mcp login` once instead. Or create a key at https://diagrams.so under Settings then AI Provider.
DIAGRAMS_API_BASE	—	—	API base URL. Defaults to production; override only for a local or self-hosted API.
DIAGRAMS_API_TIMEOUT_MS	—	—	Per-request timeout in milliseconds for slow generate/edit/fix calls.

Freshness

Maintained — last maintenance signal 52d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-08-19 · 52d ago · GitHub
Latest release
2026-08-19 · 52d ago · GitHub · v1.4.6
Package published
no data · npm/PyPI
Registry entry updated
2026-08-19 · 52d ago · official registry · v1.4.6

FAQ

›How do I install the Diagrams.so MCP server in Claude Code?

Run: claude mcp add diagrams-so -e DIAGRAMS_API_KEY='<diagrams-api-key>' -- npx -y @diagrams-so/mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Diagrams.so require an API key?

Yes. It expects DIAGRAMS_API_KEY, of which 1 is a secret.

›Can I use Diagrams.so as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Diagrams.so in the official MCP registry?

Yes, as io.github.RedHold/diagrams-so-mcp.