Build an HTTP server with Express - Bun

Express works with Bun with full Node.js compatibility.

Installation

bun add express
bun add -d @types/express

Basic Server

server.ts

import express from "express";

const app = express();
const port = 3000;

app.get("/", (req, res) => {
  res.send("Hello from Express + Bun!");
});

app.listen(port, () => {
  console.log(`Server running at http://localhost:${port}`);
});

Run with:

bun run server.ts

Middleware

import express from "express";

const app = express();

app.use(express.json());

app.post("/api/data", (req, res) => {
  res.json({ received: req.body });
});

app.listen(3000);

For better performance, consider using Bun.serve() or lightweight frameworks like Hono or Elysia.

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