Diagrams.so MCP Server

What the code does

We read the source, 8 h ago · rules 3dff92dd89df

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

    const child = spawn(cmd, args, { detached: true, stdio: "ignore" });

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add diagrams-so-mcp -- npx -y @diagrams-so/mcp

{
  "mcpServers": {
    "diagrams-so-mcp": {
      "args": [
        "-y",
        "@diagrams-so/mcp"
      ],
      "command": "npx"
    }
  }
}

[mcp_servers.diagrams-so-mcp]
command = "npx"
args = ["-y", "@diagrams-so/mcp"]

{
  "mcpServers": {
    "diagrams-so-mcp": {
      "args": [
        "-y",
        "@diagrams-so/mcp"
      ],
      "command": "npx"
    }
  }
}

{
  "mcpServers": {
    "diagrams-so-mcp": {
      "args": [
        "-y",
        "@diagrams-so/mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: DIAGRAMS_API_KEY (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.). The author declared them in the registry entry; get the values from the project itself.