Shim MCP is a self-contained MCP (Model Context Protocol) server plugin for WordPress. It provides 57 abilities that let any MCP-compatible AI client manage your WordPress site — posts, pages, media, users, plugins, menus, widgets, comments, options, and system settings. The MCP server and every ability ship in the one plugin, so no companion plugins are required.

The MCP protocol layer is derived from the WordPress project’s own MCP Adapter (GPL-2.0), and abilities are registered through WordPress’s Abilities API, which core ships from 6.9. See the Credits section below.

Key features:

57 WordPress abilities organized across 13 domains
MCP protocol 2025-06-18 over two transports: Streamable HTTP, and stdio through WP-CLI (wp shim-mcp serve)
Admin dashboard with API key generation
Config export for Claude Code, Claude Desktop, and Cursor
Conflict detection for legacy MCP plugins

Credits

Shim MCP builds on three GPL projects:

WP MCP Ultimate by Daniel Agrici (GPL-2.0-or-later) – the first version of Shim MCP was built by an autonomous fleet of coding agents that took a good part of their code from it: the plugin bootstrap, the admin dashboard, the WP-CLI command and the layout of the ability classes.
WordPress MCP Adapter (GPL-2.0) – everything under includes/Server/ (transport, JSON-RPC routing, session management, tools/resources/prompts handlers, schema transformation, error and observability infrastructure) is derived from it.
WordPress Abilities API (GPL-2.0) – every ability is registered through this core API, which WordPress ships from 6.9.

Most of the ability code, the tests and the 1.1.0 changes were written for this plugin. Full breakdown in CREDITS.md.