WebMCP guides

What WebMCP is, how to add it to your site, and what to check when Chrome doesn't see your tools.

What is WebMCP?WebMCP is a proposed web standard that lets a web page offer tools AI agents can call directly. What it is, how it works and where it runs today.
How to add WebMCP to your siteRegister your first WebMCP tool with document.modelContext.registerTool or a form with a toolname attribute, test it in Chrome, and turn it on for visitors with an origin trial token.
WebMCP vs MCP: what’s the difference?MCP connects agents to servers. WebMCP lets a web page offer tools to the agent in the visitor’s browser. How they differ, and which one you need.
Why aren’t my WebMCP tools detected?Why Chrome might see no WebMCP tools on your page, from navigator.modelContext and plain HTTP to refused registrations and CSP, and how to fix each one.