# An MCP server for your website: what it lets an assistant do

Source: https://plugster.ai/en/mcp-server

## An MCP server for your website: what it lets an assistant do

Updated on October 12, 2026

An llms.txt tells an assistant what to read. An MCP server gives it tools: search your site, read a product page, check availability at the moment the question is asked.

## MCP in two sentences

MCP (Model Context Protocol) is the standard way an assistant such as Claude or ChatGPT calls outside tools. An MCP server announces a list of tools, each with what it expects and what it returns; the assistant chooses to call them when a question calls for it.

## The tools we give your site

Each site has its own, depending on what we found on it: the product tools only exist on a shop. You choose which ones are on.

- **Search the site**: searches your pages and posts by keyword, and returns for each the title, address, a summary and the passage found.
- **Use your site's own search**: runs your site’s own search, live, and returns the pages it finds.
- **Search products**: searches your products by keyword, category and price range, and returns the price, availability, photo and address of each.
- **Check product availability**: says whether a product can be bought now, and how many are left when the page shows it, with its price.
- **Add to the visitor's cart (in their browser, after they confirm)**: prepares adding a product to the cart: see below what it does and does not do.
- **Read a page**: returns the markdown version of one page of your site.

## Three ways to call them

- The MCP server, for anyone’s assistant: Claude, ChatGPT, or any other that accepts a connector.
- In the visitor’s browser (WebMCP), for an assistant that browses your site alongside your visitor.
- A JSON endpoint, for your developers.

All three answer with the same tools and the same data.

## What they never do

- Nothing is bought. From the MCP server or the endpoint, adding to the cart only hands back the product page’s form; in the browser, it adds to the visitor’s cart only after they confirm. Payment always stays on your site.
- Nothing is made up or changed: the tools return what your public pages say, and availability is read again on the product page at the moment of the call.
- Nothing behind a login is read: only your public pages.

## Adding it to an assistant

Your dashboard gives the address of your MCP server. In Claude or ChatGPT, add a custom connector and paste it: the assistant sees your tools and can use them at once. Anyone can do so with your address; that is intended, just as anyone can read your pages.

[Create a free account](https://plugster.ai/signup)

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