# How Vapi built their MCP server on Vercel

By Steven Van · 2025-05-21

Vapi's rebuilt MCP server now supports both SSE and Streamable HTTP transport, and uses Vercel's Fluid Compute to handle client connections.

[Vercel](<https://creatorstoolbox.com/tools/vercel>)'s customer story covers how Vapi, which builds infrastructure for real-time voice agents, rebuilt its Model Context Protocol server using Vercel's MCP adapter. The previous version of Vapi's server only supported the older Server-Sent Events transport; the rebuilt version supports both SSE and the newer Streamable HTTP transport.

With the new server, Vapi users can create agents, automate testing, analyze transcripts, build workflows, and give agents access to all of Vapi's endpoints. Running on Vercel also lets Vapi use [Fluid Compute](<https://vercel.com/changelog/mcp-server-support-on-vercel-4FowFVUeMI2SORXwOBOMfo>), which reuses existing resources to handle multiple MCP client connections before scaling up new ones.

Vapi's Elizabeth Trykin said setup was fast, and that the team is looking forward to adding observability and OAuth as the server grows.

[![](<https://assets.vercel.com/image/upload/contentful/image/e5382hct74si/5BgexYzxXsnvPY1u4CxYfl/f40e9ac88f1ba0e333d3f74b4bcc5686/MCP__1_.jpg>)](<https://vercel.com/changelog/mcp-server-support-on-vercel-4FowFVUeMI2SORXwOBOMfo>)

![Vercel](<https://www.google.com/s2/favicons?domain=vercel.com&sz=128>)

Vercel

The platform for frontend developers — deploy, preview, and scale web apps and AI agents with zero config.

[View Vercel →](<https://creatorstoolbox.com/tools/vercel>)

[Original source](<https://vercel.com/changelog/mcp-server-support-on-vercel-4FowFVUeMI2SORXwOBOMfo>)

[Read How Vapi built their MCP server on Vercel on Creators Toolbox](<https://creatorstoolbox.com/blog/vercel-how-vapi-built-their-mcp-server-on-vercel>)

---
Canonical source: https://creatorstoolbox.com/blog/vercel-how-vapi-built-their-mcp-server-on-vercel