Hono — Ultrafast Web Framework for the Edge

What it is

Hono is an ultrafast, lightweight web framework designed for edge computing runtimes. It runs on Cloudflare Workers, Deno, Bun, AWS Lambda, Fastly, and Node.js with the same codebase. The framework weighs under 14KB, starts in milliseconds, and provides a familiar Express-like API with TypeScript-first design.

It targets developers building APIs, web applications, and AI service backends that need to run close to users on edge infrastructure with minimal latency.

How it saves time or tokens

Hono lets you write one API codebase and deploy it to any edge or serverless platform. Instead of learning platform-specific APIs for each cloud provider, you use Hono's unified routing, middleware, and response helpers. For AI applications, this means building lightweight proxy APIs, rate limiting layers, or model routing services that deploy globally on edge networks with sub-millisecond cold starts.

How to use

1. Create a new project:

npm create hono@latest my-app
cd my-app
npm install

1. Define routes:

import { Hono } from 'hono';

const app = new Hono();

app.get('/', (c) => c.text('Hello Hono'));
app.get('/api/health', (c) => c.json({ status: 'ok' }));

export default app;

1. Deploy to your platform:

# Cloudflare Workers
npx wrangler deploy

# Or run locally with any runtime
npx hono dev src/index.ts

Example

import { Hono } from 'hono';
import { cors } from 'hono/cors';
import { bearerAuth } from 'hono/bearer-auth';

const app = new Hono();

app.use('/api/*', cors());
app.use('/api/*', bearerAuth({ token: 'my-secret-token' }));

// AI model proxy endpoint
app.post('/api/generate', async (c) => {
    const { prompt, model } = await c.req.json();
    
    const response = await fetch('https://api.openai.com/v1/chat/completions', {
        method: 'POST',
        headers: {
            'Authorization': `Bearer ${c.env.OPENAI_KEY}`,
            'Content-Type': 'application/json'
        },
        body: JSON.stringify({
            model: model || 'gpt-4o',
            messages: [{ role: 'user', content: prompt }]
        })
    });
    
    return c.json(await response.json());
});

export default app;

Related on TokRepo

• AI tools for coding -- Developer frameworks and tools
• AI tools for API -- API development and management tools

Common pitfalls

• Edge runtimes have memory and execution time limits. AI inference tasks that take more than a few seconds or need large models should run on dedicated servers, not edge functions.
• Not all Node.js APIs are available on every edge runtime. Test your middleware and dependencies on your target platform before deploying.
• Hono's ecosystem is smaller than Express's. Check if the middleware you need exists before starting a project. Many common patterns (CORS, auth, rate limiting) are built-in.