MCP Bundle [WIP]

Symfony integration bundle for Model Context Protocol using the unofficial PHP SDK php-llm/mcp-sdk library.

Currently only supports tools as server via Server-Sent Events (SSE) and STDIO.

Installation

composer require php-llm/mcp-bundle

Usage

At first, you need to decide whether your application should act as a MCP server or client. Both can be configured in the mcp section of your config/packages/mcp.yaml file.

Act as Server

Currently only supports tools.

To use your application as an MCP server, exposing tools to clients like Claude Desktop, you need to configure in the client_transports section the transports you want to expose to clients. You can use either STDIO or SSE.

Act as Client

Not implemented yet.

To use your application as an MCP client, integrating other MCP servers, you need to configure the servers you want to connect to. You can use either STDIO or Server-Sent Events (SSE) as transport methods.

You can find a list of example Servers in the MCP Server List.

Tools of those servers are available in your LLM Chain Bundle configuration and usable in your chains.

Configuration

mcp:
    app: 'app' # Application name to be exposed to clients
    version: '1.0.0' # Application version to be exposed to clients

    # Configure this application to act as an MCP server
    # Currently exposes tools registered in LLM Chain
    client_transports:
        stdio: true # Enable STDIO via command
        sse: true # Enable Server-Sent Event via controller
    
    # Configure MCP servers to be used by this application
    # Not implemented yet
    servers:
        name:
            transport: 'stdio' # Transport method to use, either 'stdio' or 'sse'
            stdio:
                command: 'php /path/bin/console mcp' # Command to execute to start the client
                arguments: [] # Arguments to pass to the command
            sse:
                url: 'http://localhost:8000/sse' # URL to SSE endpoint of MCP server