Hattip Has a Free Universal HTTP API That Works on Every Platform

Hattip is a universal HTTP framework that runs the same code on Node.js, Deno, Bun, Cloudflare Workers, Vercel, Netlify, and AWS Lambda — no platform-specific code needed.

Core Concept

Hattip uses the Web Standard Request/Response API everywhere:

import { createRouter } from '@hattip/router';

const app = createRouter();

app.get('/', () => {
  return new Response('Hello from Hattip!');
});

app.get('/api/users', async () => {
  const users = await db.getUsers();
  return new Response(JSON.stringify(users), {
    headers: { 'Content-Type': 'application/json' }
  });
});

app.post('/api/users', async (context) => {
  const body = await context.request.json();
  const user = await db.createUser(body);
  return new Response(JSON.stringify(user), { status: 201 });
});

export default app;

Deploy Anywhere

Same code, different adapters:

// Node.js
import { createServer } from '@hattip/adapter-node';
createServer(app).listen(3000);

// Cloudflare Workers
import cloudflareAdapter from '@hattip/adapter-cloudflare-workers';
export default { fetch: cloudflareAdapter(app) };

// Deno
import { serve } from '@hattip/adapter-deno';
serve(app, { port: 3000 });

// Bun
import bunAdapter from '@hattip/adapter-bun';
export default bunAdapter(app);

Middleware

import { cookie } from '@hattip/cookie';
import { cors } from '@hattip/cors';

app.use(cookie());
app.use(cors({ origin: 'https://myapp.com' }));
app.use(async (context) => {
  const start = Date.now();
  const response = await context.next();
  console.log(`${context.method} ${context.url} - ${Date.now() - start}ms`);
  return response;
});

Why This Matters

• Write once, deploy anywhere: Same handler on 7+ platforms
• Web standards: Uses fetch API Request/Response natively
• Zero lock-in: Switch platforms by changing one import
• Tiny footprint: ~5KB core, tree-shakeable middleware

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