WebMCP
Give AI agents access to web apps via JavaScript
WebMCP launched on February 24, 2026 with 108 votes, #323 of 16,628 launches that month and more than 95% of that year's launches.
What it does
A new JavaScript interface that allows web developers to expose their web application functionality as "tools", i.e. JavaScript functions with natural language descriptions and structured schemas that can be invoked by AI agents, browser assistants, and assistive technologies. WebMCP enables collaborative workflows where users and agents work together within the same web interface, leveraging existing application logic while maintaining shared context and user control.
WebMCP is an open source JavaScript library that allows any website to integrate with the Model Context Protocol. It provides a small blue widget in the bottom right corner of your page that allows users to connect to and interact with your webpage via LLM or agent. { "mcpServers": { "webmcp": { "command": "npx", "args": [ "-y", "@jason.today/webmcp@latest", "--mcp" ] } } } Start your MCP client and ask it to make a webmcp token Click the blue square in the corner and paste the token If you're using Claude Desktop and/or don't see tools immediately appear, restart your MCP client. (hopefully all MCP client will support tool changes soon!) Getting Started (for website developers) To use…from webmcp.dev
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