I am trying to build a simple barebones node.js API using vercel. The structure of the project is like the following:

project-root/ ├── api/ │ ├── hello.js ← should map to /api/hello │ └── index.js ← should map to /api/index ├── package.json ├── vercel.json

Here is my environment:

$ node -v v20.19.0

$ vercel --version Vercel CLI 41.6.0 41.6.0

package.json

1
{
2
  "name": "vercel-hello-verified",
3
  "version": "1.0.0",
4
  "type": "module"
5
}

vercel.json

1
{
2
  "version": 2,
3
  "builds": [{ "src": "api/*.js", "use": "@vercel/node" }]
4
}

The content of hello.js

1

2
export default function handler(req, res) {
3
  console.log("📥 /api/hello was called");
4
  res.status(200).json({ message: "Hello from Vercel!" });
5
}
6

When I run "vercel dev" i get the api running at > Ready! Available at http://localhost:3000

But browsing the URL http://localhost:3000/api/hello given an error:

404: NOT_FOUNDCode: NOT_FOUNDID: dev1::lkub8-1744381659691-64bcbf88b31b

I have tried different options but nothing seems to work. This is a simple node API without any framework like express. Please help resolve.