API Reference

Complete reference documentation for the PHP MCP SDK.

Core Classes

McpServer

High-level server implementation for creating MCP servers with tools, resources, and prompts.

Client

MCP client for connecting to and interacting with MCP servers.

Types & Schemas

Type definitions, validation schemas, and data structures used throughout the SDK.

Transport APIs

Transport layer implementations for STDIO, HTTP, and WebSocket communication.

Quick Reference

Server Creation

use MCP\Server\McpServer;
use MCP\Types\Implementation;

$server = new McpServer(
    new Implementation('my-server', '1.0.0', 'Description')
);

Tool Registration

$server->tool(
    'tool-name',
    'Tool description',
    $jsonSchema,
    function (array $params): array {
        return ['content' => [['type' => 'text', 'text' => 'Result']]];
    }
);

Client Usage

use MCP\Client\Client;
use MCP\Client\Transport\StdioClientTransport;

$client = new Client(new Implementation('client', '1.0.0'));
$transport = new StdioClientTransport(['command' => 'php', 'args' => ['server.php']]);

$client->connect($transport)->await();
$result = $client->callTool('tool-name', $params)->await();

Navigation

• Server API - Creating and configuring MCP servers
• Client API - Connecting to and using MCP servers
• Types - Data types and validation schemas
• Transports - Communication layer options
• Authentication - Security and access control