> For the complete documentation index, see [llms.txt](https://docs.maker.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.maker.co/maker-greatstore/connectors/webmcp.md).

# WebMCP

Marked `BROWSER` in the connectors list, and enabled by default. WebMCP lets **the page itself** publish tools to the assistant, using the WebMCP standard.

{% hint style="info" %}
WebMCP is a web standard, not a Maker one. Chrome's [official WebMCP documentation](https://developer.chrome.com/docs/ai/webmcp) covers how to declare tools on a page — read that if you're implementing your own.
{% endhint %}

Where other connectors are servers the assistant calls, WebMCP tools live in the browser, on the page the shopper is currently looking at — which means the assistant can act on the page, not just talk about it.

## The canonical example: add to cart

On a storefront running Maker Nav, Nav defines an **add-to-cart tool** via WebMCP. A shopper viewing a product can tell the assistant "add this to my cart" — the assistant calls the page's tool and the item is actually added, on the page, with no custom integration work.

## Relationship to page context

WebMCP is the *active* counterpart to [JavaScript API](/maker-greatstore/developer-reference/javascript-api.md): context tells the assistant what is on the page, WebMCP lets it do something about it.

{% hint style="info" %}
Like every connector, WebMCP sits in the priority order — a page-published tool can override a server-side one of the same name.
{% endhint %}

## Access control

WebMCP tools are defined by the page at runtime, so there is no fixed list to configure in advance. You get the three group settings — **Write tools**, **Read-only tools**, **Other tools** — and a page-defined tool is offered to the assistant only if its group is set to Allow.

Disallowing **Write tools** here is the switch that stops the assistant acting on the page, add-to-cart included, while leaving it free to read page context. See [Controlling tool access](/maker-greatstore/connectors/tool-access.md).


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