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Informations about the package mcp-adapter

MCP Adapter

Part of the AI Building Blocks for WordPress initiative

The official WordPress package for MCP integration that exposes WordPress abilities as Model Context Protocol (MCP) tools, resources, and prompts for AI agents.

Ask DeepWiki

Overview

This adapter bridges WordPress's Abilities API with the MCP specification, providing a standardized way for AI agents to interact with WordPress functionality. It includes HTTP and STDIO transport support, comprehensive error handling, and an extensible architecture for custom integrations.

Features

Core Functionality

MCP Component Support

Architecture

For a full breakdown of the component structure, see the Architecture Overview.

Dependencies

Installation

As a WordPress Plugin (Recommended)

MCP Adapter is designed to be installed as a WordPress plugin. To install you should download the latest stable release from the GitHub Releases page and install it like any other WordPress plugin.

With WP-CLI

With WP-Env

As a Composer Library (for plugin developers)

Plugin developers may wish to install MCP Adapter as a Composer dependency to integrate MCP functionality into their own plugins.

Using Jetpack Autoloader (Highly Recommended)

When multiple plugins use the MCP Adapter, it's highly recommended to use the Jetpack Autoloader to prevent version conflicts. The Jetpack Autoloader ensures that only the latest version of shared packages is loaded, eliminating conflicts when different plugins use different versions of the same dependency.

Then load it in your main plugin file instead of the standard Composer autoloader:

Using MCP Adapter in Your Plugin

Check availability and initialize on plugins_loaded so all plugins are available before the adapter starts:

Basic Usage

The MCP Adapter automatically creates a default server that exposes registered WordPress abilities through a layered architecture. This provides immediate MCP functionality without requiring manual server configuration.

How it works:

Create a new ability (click to expand)

For detailed information about creating WordPress abilities, see the Abilities API developer documentation.

Connecting to MCP Servers

The MCP Adapter supports multiple connection methods. Here are examples for connecting with MCP clients:

STDIO Transport (Local Development)

For local development and testing, you can interact directly with MCP servers using WP-CLI commands:

MCP Client Configuration

Configure MCP clients (Claude Desktop, Claude Code, VS Code, Cursor, etc.) to connect to your WordPress MCP servers.

STDIO Transport Configuration for local sites (click to expand)
HTTP Transport via Proxy (click to expand) The [`@automattic/mcp-wordpress-remote`](https://www.npmjs.com/package/@automattic/mcp-wordpress-remote) proxy runs locally and translates STDIO-based MCP communication from AI clients into HTTP REST API calls that WordPress understands. Authentication uses [WordPress Application Passwords](https://make.wordpress.org/core/2020/11/05/application-passwords-integration-guide/).

Advanced Usage

Creating Custom MCP Servers

For advanced use cases, you can create custom MCP servers with specific configurations:

Custom Transport Implementation

The MCP Adapter includes production-ready HTTP transports. For specialized requirements like custom authentication, message queues, or enterprise integrations, you can create custom transport protocols.

See the Custom Transports Guide for detailed implementation instructions.

Custom Transport Permissions

The MCP Adapter supports custom authentication logic through transport permission callbacks. Instead of the default is_user_logged_in() check, you can implement custom authentication for your MCP servers.

See the Transport Permissions Guide for detailed authentication patterns.

Custom Error Handler

The MCP Adapter includes a default WordPress-compatible error handler, but you can implement custom error handling to integrate with existing logging systems, monitoring tools, or meet specific requirements.

See the Error Handling Guide for detailed implementation instructions.

Custom Observability Handler

The MCP Adapter includes built-in observability for tracking metrics and events. You can implement custom observability handlers to integrate with monitoring systems, analytics platforms, or performance tracking tools.

See the Observability Guide for detailed metrics tracking and custom handler implementation.

Migration

License

GPL-2.0-or-later

All versions of mcp-adapter with dependencies

PHP Build Version
Package Version
Requires php Version ^7.4 || ^8.0
wordpress/php-mcp-schema Version ^0.1.0
ext-json Version *
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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