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7/30/2026
Latest MCP spec now supported in mcp-handler

Latest MCP spec now supported in mcp-handler

Short summary

Vercel released mcp-handler 2.0.0 with support for the 2026-07-28 Model Context Protocol specification and MCP TypeScript SDK v2. The update adds a stateless compatibility layer for 2025-era Streamable HTTP clients while serving the new stateless protocol natively, with no Redis dependency required. The deprecated HTTP+SSE transport has been removed; users still depending on it should stay on 1.x while migrating.

  • •mcp-handler 2.0.0 supports the latest MCP spec and SDK v2 with stateless HTTP
  • •No Redis or session storage needed; both old and new protocols supported simultaneously
  • •Deprecated HTTP+SSE transport removed; requires Node.js 20+ and zod4

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