WebMCP isn't replacing MCP: use both

Chrome's developer team clarified the difference. MCP is the back end: a server where your data and actions live, reachable by agents on any platform at any time. WebMCP is a proposed browser standard (a bit of JavaScript or HTML attributes) that exposes actions on your live website to the browser's built-in agent, only while the page is open and the user is there. Their analogy: MCP is the call centre, WebMCP the expert in the shop. Put the core logic in MCP and the in-page actions in WebMCP. The comparison guide itself dates from March (updated May); the post is a reminder.

Why it mattersIf you want agents to book, quote or fill in forms on your site, WebMCP is how you tell them exactly how; MCP is how they reach you when nobody's on the site. It's early, so experiment on one form rather than rebuilding anything.

How we knowCompany figures are labelled as their own claims; anything we couldn't verify is labelled as a report or a claim.