
Serverless functions are tiny pieces of code that run on demand in the cloud. You don’t provision servers or infrastructure, or write scaling rules. Cloud providers handle the underlying infrastructure, automatically scaling resources based on demand. They’re perfect for lightweight APIs, form handlers, webhooks, simple auth endpoints, and glue code.
Reza Baar
October 8, 2025
How Nuxt does it (Nitro + H3)
Nuxt has built-in support for serverless functions via Nitro (its server engine). Nitro compiles your server code to many targets (Node, Vercel, Netlify, Cloudflare Workers, etc.) and runs on top of H3, a tiny, fast HTTP framework.
You write your server-side logic inside the server/api/ folder. Each file becomes an API endpoint automatically.
// server/api/hello.ts
export default defineEventHandler(() => {
return { message: 'Hello from serverless' }
})
This function will respond to GET /api/hello with a JSON object. That’s it. Visit /api/hello in your browser or useFetch() from your frontend, and you get:
{ "message": "Hello from serverless" }
Calling Your APIs from the Frontend
You can use useFetch(), useAsyncData(), or $fetch() to call these functions in your Vue components or pages.
<script setup>
const { data } = await useFetch('/api/hello')
</script>
<template>
<p>{{ data.message }}</p>
</template>
Deployment
Nuxt works with Vercel, Netlify, Cloudflare, etc. Just push your code and your functions will auto-deploy as serverless endpoints.
You don’t need to configure anything manually — just push your code.
Quick Tips to Not Shoot Yourself in the Foot
Common Use Cases
Wrap Up
With Nuxt and Nitro, serverless functions are just regular files that do backend magic. No setup, no stress. Whether you need a contact form endpoint, a webhook handler, or a simple API proxy, you can build it in minutes.
No server management required.
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