From the source

Building efficient MCP servers

Vercel's MCP adapter supports Streamable HTTP, cutting CPU usage in half for one server.

Developer tool

Image published with the post by Vercel — Image from vercel.com

Vercel's MCP adapter now supports Streamable HTTP, the recommended transport in the March 2025 MCP specification, replacing the less efficient SSE.

The adapter also supports SSE with the option to disable it.

One MCP server deployed on Vercel that switched to Streamable HTTP cut CPU usage in half despite continued user growth.

From the source
One MCP server deployed on Vercel was able to cut over to Streamable HTTP completely and cut CPU usage in half, even with continued user growth.
vercel.com

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