WebMCP

Web pages expose JavaScript tools that AI agents can invoke

W3C Web Machine Learning Community Group proposal (first published August 2025) for a JavaScript interface that lets web developers expose application functionality as "tools" — JS functions with natural language descriptions and structured schemas that can be invoked by AI agents, browser assistants, and assistive technologies. Pages that use WebMCP can be thought of as Model Context Protocol servers that implement tools in client-side script instead of on the backend, enabling collaborative human-in-the-loop workflows that share context with the user. Authored by engineers from Microsoft and Google.

• Category: General
• Use cases: Workflow Automation, AI Agents
• Pricing: Free
• Founded: 2025
• Website: https://github.com/webmachinelearning/webmcp

Related tools

• Lindy – Meet your first AI employee
• n8n – Go from prompt to possibility with AI Workflow Builder
• Zapier Agents – Superhuman teammates in minutes
• Agent AI by HubSpot – Professional Network for AI Agents