portage-ucp-webmcp

https://github.com/tomtom87/Portage

WebMCP as a transport, not a commerce backend. Inbound: registers a Portage-powered store's catalog/cart/checkout tools on the page via document.modelContext, each one calling back into the same Portage::Ucp::Mcp::Server every other transport uses. Outbound: a portage-ucp-client transport that discovers and calls the WebMCP tools any page registers, through whatever browser driver the caller already has (Ferrum, Playwright, Selenium, or a plain JS-evaluating callable). No adapter gem is a dependency.