Glossary › WebMCP
WebMCP — in-page tools a website exposes to an agent
WebMCP is an emerging browser-side standard for a website to publish callable tools — get a quote, look up an order — that an agent can invoke instead of filling in a form.
Everything else in this glossary is about an agent reading your site. This is the first entry about an agent using it. Instead of inferring which of your four contact forms produces a quote, the agent asks the page what it can do and calls the one that does it.
It is early. The reason we track it closely is that Google’s Lighthouse agent-readiness category already audits for it — tool registration, form coverage, schema validity — which is the same sequence we watched happen to the fact file: an audit appears, then the audit becomes the reason people implement the thing. The package passes the llms.txt and page-structure checks of Google’s agent-readiness audit; the WebMCP audits cover interactive tools a fact package deliberately does not install — those tools are the next lane, generated from the same profile, and we will ship them when there is something to measure rather than something to announce.
disambiguation
What WebMCP is not
- It is not a payment or checkout mechanism. Nothing here moves money.
- It is not something you install by pasting a file. It is code that describes your site’s own functions, which is why it is a later lane and not part of today’s package.
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The long version
A definition is the short answer. These go through the evidence:
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See what AI sees on your site
Vocabulary is cheap. The measurement is the part that tells you whether any of it applies to your site.
One model fetches your homepage and answers buyer questions from it. You get the recovery score and the specific answers it could not find. That is the whole free tier: it shows you the problem, and the fix package is not included.