PHP code example of wordpress / mcp-adapter

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

wordpress / mcp-adapter example snippets

// Load the Jetpack autoloader instead of vendor/autoload.php

use WP\MCP\Core\McpAdapter;

// 1. Check if MCP Adapter is available
if ( ! class_exists( McpAdapter::class ) ) {
    // Handle missing dependency (show admin notice, etc.)
    return;
}

// 2. Initialize the adapter
McpAdapter::instance();
// That's it!

// Simply register a WordPress ability
add_action( 'wp_abilities_api_init', function() {
    wp_register_ability( 'my-plugin/get-posts', [
        'label' => 'Get Posts',
        'description' => 'Retrieve WordPress posts with optional filtering',
        'category' => 'site',
        'input_schema' => [
            'type' => 'object',
            'properties' => [
                'numberposts' => [
                    'type' => 'integer',
                    'description' => 'Number of posts to retrieve',
                    'default' => 5,
                    'minimum' => 1,
                    'maximum' => 100
                ],
                'post_status' => [
                    'type' => 'string',
                    'description' => 'Post status to filter by',
                    'enum' => ['publish', 'draft', 'private'],
                    'default' => 'publish'
                ]
            ]
        ],
        'output_schema' => [
            'type' => 'array',
            'items' => [
                'type' => 'object',
                'properties' => [
                    'ID' => ['type' => 'integer'],
                    'post_title' => ['type' => 'string'],
                    'post_content' => ['type' => 'string'],
                    'post_date' => ['type' => 'string'],
                    'post_author' => ['type' => 'string']
                ]
            ]
        ],
        'execute_callback' => function( $input ) {
            $args = [
                'numberposts' => $input['numberposts'] ?? 5,
                'post_status' => $input['post_status'] ?? 'publish'
            ];
            return get_posts( $args );
        },
        'permission_callback' => function() {
            return current_user_can( 'read' );
        },
        'meta' => [
            'mcp' => [
                'public' => true, // Required for default MCP server access
            ],
        ],
    ]);
});

// With the meta.mcp.public flag, the ability is exposed through the default MCP server.
// In the default server configuration, discover it via `discover-abilities`
// and invoke it via `mcp-adapter/execute-ability` rather than expecting
// it to appear as its own entry in `tools/list`.
// Without the meta.mcp.public flag, abilities are only accessible
// through custom MCP servers that explicitly list them.

add_action('mcp_adapter_init', function($adapter) {
    $adapter->create_server(
        'my-server-id',                    // Unique server identifier
        'my-namespace',                    // REST API namespace
        'mcp',                            // REST API route
        'My MCP Server',                  // Server name
        'Description of my server',       // Server description
        'v1.0.0',                        // Server version
        [                                 // Transport methods
            \WP\MCP\Transport\HttpTransport::class,  // Recommended: MCP 2025-06-18 compliant
        ],
        \WP\MCP\Infrastructure\ErrorHandling\ErrorLogMcpErrorHandler::class, // Error handler
        \WP\MCP\Infrastructure\Observability\NullMcpObservabilityHandler::class, // Observability handler
        ['my-plugin/my-ability'],         // Abilities to expose as tools
        [],                              // Resources (optional)
        [],                              // Prompts (optional)
    );
});