WebMCP, live

WebMCP tools on any website, for every user, with nothing to install

WebMCP is a new web standard, still in draft, that lets websites offer AI agents clear actions, such as "add to cart" or "book a room". Agents then don't have to guess their way through buttons and forms. No major browser has it generally available yet, so the tools you register have no agent to call them. Open the site in a Webfuse session and any MCP agent can.

No signup, no install. The session closes by itself after 20 minutes.

Site to open

1

Tools this site offers

Open a store and the WebMCP tools it registers show up here, read live from the page.

Want this for your own site, with your own key and no timer?

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aloyoga.com

A real store, in a real session

aloyoga.com opens here inside Webfuse. Its WebMCP tools load with it.

The page loads inside a Webfuse session on demo.webfuse.com. Nothing is installed in your browser.

How it works

The demo above runs these three steps on a live Shopify store.

  1. 1. Your site

    Registers its tools

    With registerTool() in JavaScript, or a few attributes on a form. That's the WebMCP part, and you may have it done already.

    registerTool()
  2. 2. Webfuse session

    Runs the site in any browser

    The visitor opens your site through a Webfuse link. The session supports WebMCP, whatever browser they use.

    any browser
  3. 3. Your agent

    Calls the tools over MCP

    An MCP-compatible agent connects to the session, sees the site's tools in its tool list and calls them by name.

    tools/call

What Webfuse adds

First-class WebMCP support for any user, in any browser and any region.

  • Works everywhere now

    Every Webfuse session supports WebMCP, whatever browser the user is on and wherever they are. Users don't install anything, turn on a flag or join a trial.

    Open a store above

  • No-code forms

    A website can turn an ordinary form into an AI tool by adding a few HTML attributes.

    <form toolname="bookTable"
      tooldescription="Book a table at the restaurant.">
  <input name="guests" type="number"
         toolparamdescription="Number of guests, 1-8">
  <input name="date" type="date">
  <button>Book</button>
</form>

    toolname and tooldescription go on the form, toolparamdescription on a field. Draft spec, so names can still change.

    Declarative API in Chrome's docs

  • Any AI agent can use it

    Tools a website offers are available to any MCP-compatible agent connected to the session.

    Connect your agent

  • Works on sites you don't own

    Webfuse Extensions can add AI tools to any website, including third-party and legacy apps. An extension registers them with registerTool(), or you record them in the Automation Inspector instead of writing code.

    Custom tools in the docs

  • Safe by default

    Tools from websites are flagged as untrusted, and admins choose which sites may add tools. Form tools hand control back to the user to review before anything is submitted.

    See the untrusted flag in the demo

Where WebMCP runs today

No major browser has WebMCP generally available yet.

  • Chrome logo

    Chrome

    Opt-in developer trial

  • Edge logo

    Edge

    Opt-in developer trial

  • Firefox logo

    Firefox

    Switched off

  • Safari logo

    Safari

    Not supported

  • Webfuse logo

    Webfuse session

    Any browser, any region

Open your own site's tools to agents

A free account gets you a Webfuse space and an API key, so you can run your site in sessions and connect agents to them. The cheat sheet covers the WebMCP API, tool definitions, testing and security.

Start building free WebMCP cheat sheet