How Vapi built their MCP server on Vercel

Vercel recently published a Model Context Protocol (MCP) adapter that makes it easy to spin up an MCP server on most major frameworks, enabling users like Vapi to build real-time voice agents. Vapi's MCP server was rebuilt using the Vercel MCP adapter, allowing them to support both Server-Sent Events and Streamable HTTP transports out of the box, and leveraging Fluid Compute for optimized resource utilization. By deploying their MCP server on Vercel, Vapi can focus on building their product instead of managing infrastructure, with features like observability and OAuth being added as their server grows.