Vercel MCP first to support 2026-07-28 spec, dual protocol coexistence eases migration

Summary

Vercel MCP now officially supports the new 2026-07-28 MCP protocol while also supporting the older 2025 protocol on the same endpoint. Clients automatically negotiate the protocol version with no changes needed. mcp-handler 2.0 is rebuilt on the official MCP SDK v2, offering native stateless suppor…

Key points

Vercel, as the first major hosted MCP server to support the new spec, provides a migration reference for developers.
Vercel MCP's dual protocol support simplifies the transition period and reduces the urgency for developers to migrate.
Developers using Vercel MCP can immediately benefit from the new protocol's advantages, while self-hosted users need to plan upgrades.

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