Express

mkdir unkey-with-express
npm init -y
npm install cors dotenv express ts-node
npm install -D @types/cors @types/express ts-node-dev typescript

"scripts": {
    "start": "ts-node ./index.ts",
    "build": "tsc",
    "serve": "node dist/index.js"
  },

npm install @unkey/ratelimit

UNKEY_ROOT_KEY="YOUR_KEY"

import express, { Request, Response, Application } from 'express';
import dotenv from 'dotenv';
import { Ratelimit } from '@unkey/ratelimit';
//For env File
dotenv.config();

const app: Application = express();
const port = process.env.PORT || 8000;

/**
This can be a seperate util for easy configurable ratelimiting across
multiple routes.

namespace = The route identifier you would like to ratelimit
limit = The amount of requests
duration = amount of time to limit against for example "30s"

**/
const limiter = new Ratelimit({
    namespace: "express-example",
    limit: 2,
    duration: "30s",
    rootKey: process.env.UNKEY_ROOT_KEY
});


app.get('/', (req: Request, res: Response) => {
  res.send('Welcome to Express & TypeScript Server');
});

// This endpoint is protected by Unkey
app.get('/secret', async (req: Request, res: Response) => {
  const identifier = req.getUserId() // or ip or anything else you want

  const ratelimit = await limiter.limit(identifier)
  if (!ratelimit.success){
    res.status(429).send("Please try again later")
  }

  return res.status(200).send("ok");
})
app.listen(port, () => {
  console.log(`Server is listening at http://localhost:${port}`);
});

npm run start

curl 'http://localhost:8000/secret'