Description

WebMCP Bridge exposes your WordPress (and WooCommerce) functionality as WebMCP tools that AI agents can discover and invoke directly in the browser.

Once installed, your site automatically becomes “agent-friendly”:

AI agents can search posts, pages, and custom post types
AI agents can browse products, manage the cart, apply coupons (WooCommerce)
AI agents can read navigation menus and site metadata
Developers can register custom tools in minutes via a simple PHP API

What is WebMCP?

WebMCP is a new browser-native protocol (currently in Chrome Early Preview) that lets web apps expose their functionality as structured “tools” that AI agents can invoke — without needing to screenshot or parse HTML. Think of your website as an MCP server running entirely client-side.

How it works

Install and activate the plugin
Enable the features you want from Settings WebMCP Bridge
Your tool manifest is immediately available at /wp-json/webmcp-bridge/v1/manifest
AI agents (or any JavaScript code) can call your tools via REST API or the native browser WebMCP API

Included tools

Core:

search_posts — Search posts, pages, or custom post types
get_post — Retrieve a single post by ID or slug
get_menu — Return navigation menu items
get_categories — List taxonomy terms
get_site_info — Site name, description, URL, language
submit_contact_form — Contact Form 7 integration

WooCommerce (requires WooCommerce plugin):

woo_search_products — Search by keyword, category, price range
woo_get_product — Full product details including attributes
woo_add_to_cart — Add a product to the cart
woo_get_cart — Current cart contents and totals
woo_remove_from_cart — Remove an item by cart key
woo_apply_coupon — Apply a coupon code
woo_get_checkout_fields — Return checkout field schema
woo_get_product_categories — List all product categories

Even more powerful with Mescio for Agents

WebMCP Bridge integrates automatically with the Mescio for Agents plugin. When both plugins are active, two additional tools are unlocked:

get_markdown_content — Returns any post or page as clean Markdown, the format AI models consume most efficiently. Instead of raw HTML, agents receive structured, token-optimized content ready for reasoning and summarization.
get_llms_txt — Exposes the site-wide llms.txt context document (index or full variant), giving agents an instant, structured overview of what the site is about, who it is for, and what content is available — before they even start searching.

Together, the two plugins turn your WordPress site into a fully AI-native content source: WebMCP Bridge handles the tool layer (what agents can do), while Mescio for Agents handles the content layer (what agents can read and understand).

Privacy

This plugin does not collect, store, or transmit any user data to external servers. All tool execution happens locally within your WordPress installation. No telemetry, no phone-home, no external API calls.

Screenshots

Settings page — enable/disable tool groups and copy the manifest URL

Installation

Upload the webmcp-bridge folder to /wp-content/plugins/
Activate the plugin via Plugins Installed Plugins
Go to Settings WebMCP Bridge and enable the features you want

Minimum Requirements

WordPress 6.0 or higher
PHP 8.0 or higher
WooCommerce 7.0+ (optional, only required for WooCommerce tools)
Contact Form 7 (optional, only required for form tools)
Mescio for Agents (optional, unlocks get_markdown_content and get_llms_txt)

FAQ

Do I need Chrome for this to work?

No. The REST API endpoints work in every browser and environment. The native WebMCP browser registration is only available in Chrome Early Preview (experimental), but the fallback JavaScript API (window.webmcpBridgeTools) and REST endpoints work everywhere.

Is this secure?

Yes. Read-only tools (search, get post, etc.) are publicly accessible by default, matching WordPress’s own REST API behaviour. Write-action tools (add to cart, apply coupon, submit form) require a valid WordPress nonce. You can customise which tools require authentication via the webmcp_bridge_protected_tools filter.

Does it work with WooCommerce?

Yes. WooCommerce tools are automatically registered when WooCommerce is active and the WooCommerce option is enabled in settings.

What does Mescio for Agents add?

When Mescio for Agents is active alongside WebMCP Bridge, two extra tools become available in the manifest: get_markdown_content (AI-optimized content format) and get_llms_txt (site-wide context document). These are detected automatically — no configuration needed.

Can I add my own tools?

Absolutely. Use the PHP API:

add_action( 'plugins_loaded', function() {
    if ( ! class_exists( 'WebMCP_Bridge_Tool_Registry' ) ) return;
    $registry = WebMCP_Bridge_Tool_Registry::instance();
    $registry->register( 'my_tool', [
        'description' => 'Does something useful.',
        'group'       => 'custom',
        'inputSchema' => [ 'type' => 'object', 'properties' => [] ],
        'callback'    => function( $params ) { return [ 'ok' => true ]; },
    ] );
} );

Where is the manifest URL?

https://your-site.com/wp-json/webmcp-bridge/v1/manifest

You can also find it on the Settings WebMCP Bridge page with a one-click copy button.

Does this plugin collect any data?

No. WebMCP Bridge does not collect, store, or send any data to external servers. See the Privacy section above.

Reviews

There are no reviews for this plugin.

Contributors & Developers

“WebMCP Bridge” is open source software. The following people have contributed to this plugin.

Mescio

Translate “WebMCP Bridge” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.

Changelog

1.3.1

Security: sanitize Markdown output in get_markdown_content and get_llms_txt before returning to agent — prevents stored XSS / prompt injection via post content

1.2.0

Added Live API Examples section in admin: test every tool directly from the settings page
curl and JavaScript snippets auto-generated for each tool with real site URL
Added Mescio for Agents examples (llms.txt, get_markdown_content) when plugin is active
Admin JS extracted to separate file for better caching and CSP compatibility
Added full Italian translation (it_IT) — .po, .mo and .pot files included
Admin UI: tab navigation for examples, live JSON output viewer

1.1.0

Added integration with Mescio for Agents plugin: when active, unlocks get_markdown_content and get_llms_txt tools
Manifest now filters tools based on enabled settings — disabled groups no longer appear
Added site_url and mescio_for_agents fields to manifest response
Tool groups refactored: core split into content, navigation, forms for finer control
Improved error handling: registry now catches all Throwable (not just Exception)
Fixed wp_remote_get in llms-full.txt fetch: proper timeout, user-agent, SSL filter
Fixed: tools disabled in settings were still executable via REST — now correctly blocked

1.0.1

Added automatic compatibility with Autoptimize, WP Rocket, LiteSpeed Cache, W3 Total Cache, SG Optimizer
Fixed duplicate textdomain and deactivation hooks
Added ABSPATH protection to all PHP files
Fixed output escaping in exception messages

1.0.0

Initial release
Core tools: search_posts, get_post, get_menu, get_categories, get_site_info, submit_contact_form
WooCommerce tools: product search, cart management, coupon, checkout fields
REST API manifest and execution endpoints
JavaScript frontend bridge with WebMCP browser API support and fallback
Admin settings page

Description

Screenshots

Installation

Minimum Requirements

FAQ

Do I need Chrome for this to work?

Is this secure?

Does it work with WooCommerce?

What does Mescio for Agents add?

Can I add my own tools?

Where is the manifest URL?

Does this plugin collect any data?

Reviews

Contributors & Developers

Interested in development?

Changelog

1.3.1

1.2.0

1.1.0

1.0.1

1.0.0

Meta

Ratings

Contributors

Support