Webmcp Trail

Webmcp Trail turns the tools a website exposes via WebMCP (navigator.modelContext)
into a governed MCP server your AI agents can call — with a human in the loop.

Modern sites are starting to publish first-party "tools" through the emerging WebMCP
standard: set an order, book a slot, run a search, read your data. Webmcp Trail lets
you connect those tools to any MCP client, while routing every call through the
MCPTrail guardian proxy so nothing runs unchecked.

WHAT YOU CAN DO
• Discover the WebMCP tools on your current tab, instantly.
• Run any tool right from the popup — with a form built from the tool's own schema.
• Create a guarded server from a site in one click, and bridge its tools upstream.
• Manage multiple servers from a single dropdown: paired, waiting, or re-pair.

GOVERNANCE, BUILT IN (with a free MCPTrail account)
• Human-in-the-loop approvals — flip HITL on per tool; risky calls wait for you.
• Policy enforcement, drift detection, and DLP applied to every call.
• Full audit trail of what was called, by whom, with what arguments.
• Live credit and usage tracking per server.

NO ACCOUNT? NO PROBLEM
Discover and run a site's tools locally, ungoverned, with zero setup. When you want
approvals, policy, and audit, create a free account at app.mcptrail.com in a click.

REQUIREMENTS
• Chrome 150+ with WebMCP enabled (chrome://flags/#enable-webmcp-testing) to detect
tools on pages that publish them.
• An MCPTrail account (free) for governed servers, approvals, and audit.

Privacy: https://mcptrail.com/extension-privacy/