# WebMCP support now available in mcp-handler

Publisher-attributed story with a reviewed brief or permitted publisher paragraph. The original publisher is responsible for the linked reporting.

- Publisher: Vercel
- Author credit: Andrew Qu; Boris Besemer
- Category: Cloud
- Original publication time: 2026-09-18T18:00:00Z
- Original update time: 2026-09-18T18:00:00Z
- First observed by NexusTechWire: 2026-10-01T20:28:47Z
- Original source: https://vercel.com/changelog/webmcp-mcp-handler
- NexusTechWire record: https://nexustechwire.com/news/news-6fe0fc6c732bdb8c4894

## The brief

Vercel's mcp-handler 2.2.0 adds experimental support for WebMCP, a proposed standard that exposes tools to agents inside the browser. Developers explicitly opt tools in and load a script from their MCP endpoint. Calls are forwarded to the MCP server using the signed-in user's identity, allowing authenticated tools without a separate browser-side OAuth flow.

AI-assisted NexusTechWire summary, checked against the linked source on 2026-10-02T00:20:18Z. Not independent reporting.

Read the full original: [Vercel](https://vercel.com/changelog/webmcp-mcp-handler)

This record does not reproduce the complete article or represent independent confirmation of every source claim.