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Example code of logiscape/mcp-sdk-php

Informations about the package mcp-sdk-php

Model Context Protocol SDK for PHP

This package provides a PHP implementation of the Model Context Protocol, allowing applications to provide context for LLMs in a standardized way. It separates the concerns of providing context from the actual LLM interaction.

Overview

This PHP SDK implements the full MCP specification, making it easy to:

Based on the official Python SDK for the Model Context Protocol.

Installation

You can install the package via composer:

Requirements

Basic Usage

Creating an MCP Server

Here's a complete example of creating an MCP server that provides prompts:

Save this as example_server.php

Creating an MCP Client

Here's how to create a client that connects to the example server:

Save this as example_client.php and run it:

Advanced Logging For Debugging

Using Logging

You can enable detailed logging on the client side, the server side, or both.

Creating an MCP Server With Logging

Here's the previous example MCP server with detailed logging enabled:

Save this as debug_example_server.php

Creating an MCP Client With Logging

Here's how to create a client with detailed logging enabled:

Save this as debug_example_client.php and run it:

MCP Web Client

The "webclient" directory includes a web-based application for testing MCP servers. It was designed to demonstrate a MCP client capable of running in a typical web hosting environment.

Setting Up The Web Client

To setup the web client, upload the contents of "webclient" to a web directory, such as public_html on a cPanel server. Ensure that the MCP SDK for PHP is installed in that same directory by running the Composer command found in the Installation section of this README.

Using The Web Client

Once the web client has been uploaded to a web directory, navigate to index.php to open the interface. To connect to the included MCP test server, enter php in the Command field and test_server.php in the Arguments field and click Connect to Server. The interface allows you to test Prompts, Tools, and Resources. There is also a Debug Panel allowing you to view the JSON-RPC messages being sent between the Client and Server.

Web Client Notes And Limitations

This MCP Web Client is intended for developers to test MCP servers, and it is not recommended to be made publicly accessible as a web interface without additional testing for security, error handling, and resource management.

While MCP is usually implemented as a stateful session protocol, a typical PHP-based web hosting environment restricts long-running processes. To maximize compatibility, the MCP Web Client will initialize a new connection between the client and server for every request, and then close that connection after the request is complete.

Documentation

For detailed information about the Model Context Protocol, visit the official documentation.

Credits

This PHP SDK was developed by:

Additional debugging and refactoring done by Josh Abbott using OpenAI ChatGPT o1 pro mode.

Based on the original Python SDK for the Model Context Protocol.

License

The MIT License (MIT). Please see License File for more information.

All versions of mcp-sdk-php with dependencies

PHP Build Version
Package Version
Requires php Version >=8.1
psr/log Version ^3.0
ext-curl Version *
cboden/ratchet Version ^0.4
monolog/monolog Version ^3.0
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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