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mcp-handler 2.2.0 adds experimental WebMCP support

Vercel's mcp-handler 2.2.0 lets AI agents browsing your site call WebMCP tools as the signed-in user with no OAuth flow, via an allowlist and a single script tag.

Vercel Developers

@vercel_devArchived 2026.09.19Originally posted 2026.09.19

Vercel Developers @vercel_devOriginally posted 2026.09.19

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Agents browsing your site can use WebMCP tools instead of clicking through your UI. 𝚖𝚌𝚙-𝚑𝚊𝚗𝚍𝚕𝚎𝚛 𝟸.𝟸.𝟶 adds experimental WebMCP support. Allowlist tools and add one script tag. In-browser agents call them as the signed-in user, with no OAuth flow. https://t.co/5f4JX3n6Bd

x.com/vercel_dev/status/2101051363270811690Archived 2026.09.19 10:24