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@arcjet/next

v1.0.0-alpha.12

Published

Arcjet SDK for the Next.js framework

Downloads

1,339

Readme

@arcjet/next

Arcjet helps developers protect their apps in just a few lines of code. Implement rate limiting, bot protection, email verification & defend against common attacks.

This is the Arcjet SDK for the Next.js framework.

Looking for our Node.js SDK? Check out the @arcjet/node package.

Getting started

Visit docs.arcjet.com to get started.

Installation

npm install -S @arcjet/next

Rate limit example

The Arcjet rate limit example below applies a token bucket rate limit rule to a route where we identify the user based on their ID e.g. if they are logged in. The bucket is configured with a maximum capacity of 10 tokens and refills by 5 tokens every 10 seconds. Each request consumes 5 tokens.

See the Arcjet rate limit documentation for details.

import arcjet, { tokenBucket } from "@arcjet/next";
import { NextResponse } from "next/server";

const aj = arcjet({
  key: process.env.ARCJET_KEY!, // Get your site key from https://app.arcjet.com
  rules: [
    // Create a token bucket rate limit. Other algorithms are supported.
    tokenBucket({
      mode: "LIVE", // will block requests. Use "DRY_RUN" to log only
      characteristics: ["userId"], // track requests by a custom user ID
      refillRate: 5, // refill 5 tokens per interval
      interval: 10, // refill every 10 seconds
      capacity: 10, // bucket maximum capacity of 10 tokens
    }),
  ],
});

export async function GET(req: Request) {
  const userId = "user123"; // Replace with your authenticated user ID
  const decision = await aj.protect(req, { userId, requested: 5 }); // Deduct 5 tokens from the bucket
  console.log("Arcjet decision", decision);

  if (decision.isDenied()) {
    return NextResponse.json(
      { error: "Too Many Requests", reason: decision.reason },
      { status: 429 },
    );
  }

  return NextResponse.json({ message: "Hello world" });
}

Shield example

Arcjet Shield protects your application against common attacks, including the OWASP Top 10. It’s enabled by default and runs on every request with negligible performance impact.

See the Arcjet Shield documentation for details.

import arcjet from "@arcjet/next";
import { NextResponse } from "next/server";

const aj = arcjet({
  // Get your site key from https://app.arcjet.com
  // and set it as an environment variable rather than hard coding.
  // See: https://nextjs.org/docs/app/building-your-application/configuring/environment-variables
  key: process.env.ARCJET_KEY,
  rules: [], // Shield requires no rule configuration
});

export async function GET(req: Request) {
  const decision = await aj.protect(req);

  if (decision.isDenied()) {
    return NextResponse.json(
      { error: "Too Many Requests", reason: decision.reason },
      { status: 429 },
    );
  }

  return NextResponse.json({ message: "Hello world" });
}

API

Reference documentation is available at docs.arcjet.com.

License

Licensed under the Apache License, Version 2.0.