WordPress MCP Adapter or a ready-made MCP plugin?

The MCP Adapter is a WordPress plugin of the WordPress project. It is part of the AI Building Blocks for WordPress initiative. It connects the WordPress Abilities API with the Model Context Protocol (MCP).

An ability is one thing that WordPress core or a plugin registers, such as reading posts or updating a setting. The Abilities API is part of WordPress core since version 6.9. The adapter turns abilities into MCP tools, resources and prompts.

The adapter is the server and transport layer. What it offers comes from the abilities that core and your plugins register.

• Requirements. WordPress 6.9 or newer and PHP 7.4 or newer.
• Opt-in. An ability is reachable over MCP once it is marked public.
• Permissions. Permission checks run against the current WordPress user before anything executes.
• Default server. It answers at /wp-json/mcp/mcp-adapter-default-server. Three tools discover abilities, show their details and execute them.
• Transports. HTTP, and STDIO through WP-CLI with wp mcp-adapter serve.
• Sign-in. HTTP clients authenticate as a WordPress user. The docs show application passwords through a local proxy.
• More servers. Developers can create their own servers with a chosen set of abilities.

This makes it a building block. It suits developers who assemble the MCP server their site needs.

AlphaBridge speaks MCP itself, in PHP inside WordPress, at /wp-json/alphabridge/v1/mcp. Its tools come with the plugin. Free has 40 tools, Pro has 135 and Agency has 143.

• Setup. Install it from your WordPress dashboard like any plugin. In Claude, pick it from the connector directory and approve on your own site. There is no token to copy.
• Other clients. In ChatGPT, you add the site as an MCP app with OAuth, from ChatGPT Plus upwards. Cursor and Claude Code connect with a token.
• Scope. The free plugin covers content, media and comments, and reads SEO fields. Pro adds page-builder texts, theme and plugin files, PHP snippets, WooCommerce, users and the database.
• Control. It only reads until an administrator switches on write access. Each connection has its own access level. The audit log keeps the latest 200 calls.
• Pro's way back. Pro keeps undo points for page and file edits. After PHP edits to active code, Pro tests the site.
• Many sites. The free hub brings up to 10 sites into one chat, in every edition.
• Requirements. The free plugin needs WordPress 6.5 or newer and PHP 8.0 or newer.

This makes it a ready set of tools. It suits site owners and agencies who want to run a site by chat right away.

MCP Adapter, default server
https://your-site.tld/wp-json/mcp/mcp-adapter-default-server

AlphaBridge MCP
https://your-site.tld/wp-json/alphabridge/v1/mcp

AlphaBridge Pro reaches the abilities of other plugins through the Abilities API, on WordPress 6.9 and newer. Two tools do this.

• wp_list_abilities lists the abilities that plugins and WordPress register. It shows name, label, category and a short input schema.
• It also says whether each one can run, and if not, how to get there.
• wp_run_ability runs one when write access is on and the connection has full access.
• Then every ability runs that an administrator has not switched off under Fine-tuning.
• Read-only abilities run at once. Every other one shows a preview first and runs with apply=true.
• If the input names a post, Pro first saves an undo point of it. This works for up to 25 posts per call.
• Afterwards Pro reads the posts back. The answer says so when a run saved nothing on a page.

The ability checks the input and the user's permission itself. What it does is decided by the plugin that offers it.

The adapter and AlphaBridge each have their own endpoint. An MCP client talks to the one you add to it. The full list of AlphaBridge tools is in the tool reference.