Who runs it
The W3C Web Machine Learning Community Group. It is a draft community group report, not a W3C standard.
WebMCP: Web Model Context Protocol
Lets a website expose actions, such as “add to cart” or “check stock”, as tools an agent in the browser can call directly instead of guessing which button to press.
WebMCP
At a glance
Where it stands
A draft community group report. In origin trial from Chrome 149 (announced June 2026). Shopify added WebMCP tools to checkout on 28 September 2026.
Source: W3C Web Machine Learning CG · WebMCP draft ↗ ·
Source: Chrome for Developers ↗ ·
Source: Shopify changelog ↗ ·
In Türkiye
No country restrictions are stated. Shopify’s checkout tools hand control back to the buyer for steps such as 3D Secure.
Source: Shopify changelog ↗ ·
Partly checked
What our free test checks
Our free test: Partly checked
Looks in the initial HTML for a form with a toolname attribute or a modelContext.registerTool call. The agent simulator, which runs a real browser, also lists the tools a page offers.
Shown in the result as
- WebMCP tool markers (in the page source)
Our rules
How the test treats protocols
- None of these affects the score. Adoption is still very low, so a missing file is information, not a fault.
- Only GET requests to the store’s own domain, small and short. We never call an endpoint, open a session, send a POST or place an order.
- A file counts only if it is a valid JSON object of the expected shape; a soft 404 page doesn’t count.
- Every request is listed on our crawler page, and you can ask to have your site excluded.
Agent protocol map
Keep reading
Related reading
Shopify opened checkout to browser agents. What WebMCP means for every other store →
Other protocols
Does your store publish WebMCP?
The free test reads the files and signals on this page from your store, with GET requests only.