Deploy to Vercel

Vercel is supported through @redopjs/redop/vercel (vercel / vercelEdge).

Fit today

Item	Value
Recommended for built-in Bun `.listen()`	no — use the adapter
Recommended protocol	MCP `2026-07-28` (stateless)
`create-redop-app` preset	`--deploy vercel`
Generated files	`vercel.json`, `api/index.ts`
`afterResponse`	pass `waitUntil` from `@vercel/functions`

Minimal function

import { Redop, vercel } from "@redopjs/redop/vercel";
import { waitUntil } from "@vercel/functions";

const app = new Redop({
  serverInfo: { name: "vercel-mcp", version: "0.1.0" },
}).tool("ping", {
  handler: async () => ({ ok: true }),
});

export default vercel(app, {
  health: true,
  waitUntil,
});

Scaffold

bunx create-redop-app my-vercel-mcp --transport http --deploy vercel

Generated `vercel.json`

{
  "$schema": "https://openapi.vercel.sh/vercel.json",
  "bunVersion": "1.x"
}

Capability notes

Prefer stateless MCP (2026-07-28).
Without waitUntil, deferred afterResponse work may be dropped on short-lived serverless isolates.
For always-on sessioned MCP + SSE, prefer Railway, Fly.io, Docker, or Node.

Validate

curl -X POST https://your-app.vercel.app/mcp \
  -H 'Content-Type: application/json' \
  -H 'MCP-Protocol-Version: 2026-07-28' \
  -H 'Mcp-Method: server/discover' \
  --data '{"jsonrpc":"2.0","id":0,"method":"server/discover","params":{}}'

​Fit today

​Minimal function

​Scaffold

​Generated vercel.json

​Capability notes

​Validate

​Next

Fit today

Minimal function

Scaffold

Generated `vercel.json`

Capability notes

Validate

Next