From the source

How Vapi built their MCP server on Vercel

Vapi rebuilt its MCP server on Vercel, adding Streamable HTTP transport.

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

Vapi rebuilt its MCP server on Vercel, enabling support for both SSE transport and the newer Streamable HTTP transport.

The migration used Vercel's MCP Adapter and Fluid Compute to optimize resource usage.

The server allows users to create agents, automate testing, analyze transcripts, build workflows, and access all of Vapi's endpoints.

From the source
By rebuilding their MCP server using Vercel's MCP adapter, Vapi is now able to support both SSE transport and the newer Streamable HTTP transport out of the box.
vercel.com

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