MCP Tools

LARouter exposes tools via the Model Context Protocol (MCP), enabling AI agents and editors to delegate tasks to expert models.

Available Tools

`delegate_to_expert`

Route a prompt to the optimal model based on task complexity.

Parameters:

Parameter	Type	Required	Description
`prompt`	string	✅	The prompt to send to the expert model
`tier`	enum	❌	Force a tier: `HEARTBEAT`, `SIMPLE`, `MODERATE`, `COMPLEX`, `FRONTIER`
`model`	string	❌	Force a specific model ID
`maxTokens`	number	❌	Maximum response tokens (default: 4096)

Example (MCP JSON-RPC):

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "delegate_to_expert",
    "arguments": {
      "prompt": "Write a Python function to parse CSV files",
      "tier": "COMPLEX"
    }
  },
  "id": 1
}

`list_available_models`

List all models registered in LARouter with their status.

Parameters: None.

Response:

{
  "models": [
    {
      "id": "gemma-4-e4b",
      "name": "Gemma 4 E4B",
      "status": "running",
      "port": 8001,
      "tier": "SIMPLE"
    },
    {
      "id": "gpt-4o",
      "name": "GPT-4o",
      "status": "available",
      "tier": "COMPLEX"
    }
  ]
}

Transports

stdio (Default)

For AI editors (Cursor, VS Code, Windsurf) that communicate via stdin/stdout:

larouter mcp

MCP Client Config (mcp.json):

{
  "mcpServers": {
    "larouter": {
      "command": "larouter",
      "args": ["mcp"],
      "transportType": "stdio"
    }
  }
}

SSE (Server-Sent Events)

For web clients that connect over HTTP:

larouter mcp --sse --port 18791

Connect to http://localhost:18791/sse for the event stream.

Integration Example

With Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "larouter": {
      "command": "/path/to/larouter",
      "args": ["mcp"]
    }
  }
}

With LADesigner

LARouter's MCP tools integrate natively with the LibreApps Designer AI assistant, enabling it to delegate expensive tasks to frontier models while keeping simple tasks local.

Available Tools​

delegate_to_expert​

list_available_models​

Transports​

stdio (Default)​

SSE (Server-Sent Events)​

Integration Example​

With Claude Desktop​

With LADesigner​