Archi MCP Server

An Eclipse PDE plugin for Archi that exposes ArchiMate models through the Model Context Protocol (MCP), enabling LLMs to query, analyse, and modify enterprise architecture models through natural language.

What It Does

Archi MCP Server embeds an HTTP server inside Archi that speaks MCP. Once running, any MCP-compatible LLM client (Claude, Cline, LM Studio, etc.) can connect and interact with the currently open ArchiMate model — asking questions, searching elements, traversing relationships, composing view diagrams, and even creating or modifying model content.

The server provides 69 MCP tools across querying, searching, creating, layout, routing, assessment, batch operations, images, specializations, and more — plus 14 MCP resources with ArchiMate reference material, workflow guides, and a viewpoint recipe library for LLMs.

Example conversation:

You: "What applications support the Customer Portal capability?"

LLM: Searches elements, traverses relationships, and returns: "7 applications support Customer Portal: OrderService, PaymentGateway, ..."

Requirements

LLM model size recommendation: 8B+ parameters minimum, 14B+ for reliable tool calling, 70B+ for complex view composition workflows.

Installation

1. Download the latest .archiplugin from the Releases page (or the bin/ directory for pre-built artifacts)
2. In Archi: Help > Manage Plug-ins > Install New... or copy to Archi's dropins/ folder
3. Restart Archi

Getting Started

1. Start the Server

Open an ArchiMate model in Archi, then:

Menu: MCP Server > Start MCP Server

The MCP Server entry in Archi's menu bar has three items:

Server behaviour (port, bind address, TLS, authentication, …) is configured separately under Window > Preferences > MCP Server — see Configuration. The default endpoint is http://127.0.0.1:18090.

2. Configure Your LLM Client

Claude Code (CLI)

In your project's .mcp.json or ~/.claude.json:

{
  "mcpServers": {
    "archi": {
      "type": "http",
      "url": "http://127.0.0.1:18090/mcp"
    }
  }
}

Or via the CLI:

claude mcp add --transport http archi http://127.0.0.1:18090/mcp

Claude Desktop

Claude Desktop does not natively support Streamable HTTP, so a proxy is required. Install uv (a single Rust binary), then add to your claude_desktop_config.json:

Windows:

{
  "mcpServers": {
    "archi": {
      "command": "C:\\Users\\YOUR_USER\\.local\\bin\\uvx.exe",
      "args": ["mcp-proxy", "--transport", "streamablehttp", "http://127.0.0.1:18090/mcp"]
    }
  }
}

macOS:

{
  "mcpServers": {
    "archi": {
      "command": "uvx",
      "args": ["mcp-proxy", "--transport", "streamablehttp", "http://127.0.0.1:18090/mcp"]
    }
  }
}

Cline / Other MCP Clients

Point your MCP client at the Streamable-HTTP endpoint:

http://127.0.0.1:18090/mcp

SSE transport is also available at /sse for older clients.

3. Start Querying

With the server running and your LLM client connected, you can ask questions in natural language:

• "Give me an overview of this architecture model"
• *"Find all Applicat

... View full README on GitHub