---
title: "Get started with Arcjet"
titleByFramework:
  default: "Get started with Arcjet"
  astro: "Get started with Astro"
  bun: "Get started with Bun"
  bun-hono: "Get started with Bun + Hono"
  deno: "Get started with Deno"
  fastify: "Get started with Fastify"
  nest-js: "Get started with NestJS"
  next-js: "Get started with Next.js"
  node-js: "Get started with Node.js"
  node-js-express: "Get started with Node.js + Express"
  node-js-hono: "Get started with Node.js + Hono"
  nuxt: "Get started with Nuxt"
  python-fastapi: "Get started with Python + FastAPI"
  python-flask: "Get started with Python + Flask"
  react-router: "Get started with React Router"
  remix: "Get started with Remix"
  sveltekit: "Get started with SvelteKit"
description: "Getting started with Arcjet. Quick start guide to protect your AI applications from abuse, apply per-user token budgets, and block automated clients."
prev: false
next: false
frameworks:
  - astro
  - bun
  - bun-hono
  - deno
  - fastify
  - nest-js
  - next-js
  - node-js
  - node-js-express
  - node-js-hono
  - nuxt
  - python-fastapi
  - python-flask
  - react-router
  - remix
  - sveltekit
ajToc:
  - text: 0. Get Started
    anchor: "0-get-started"
  - text: 1. Install Arcjet
    anchor: "1-install-arcjet"
  - text: 2. Set your key
    anchor: "2-set-your-key"
  - text: 3. Configure
    anchor: "3-configure"
  - text: 4. Start app
    anchor: "4-start-app"
  - text: "FAQs"
    anchor: "faqs"
  - text: "What next?"
    anchor: "what-next"
  - text: "Get help"
    anchor: "get-help"
---

import { YouTube } from "astro-embed";
import SlotByFramework from "@/components/SlotByFramework";
import FrameworkLinks from "@/components/FrameworkLinks";
import { Link } from "@/components/link";
import { LinkButton, CardGrid } from "@astrojs/starlight/components";
import FAQs from "/src/components/FAQs.astro";
import WhatIsArcjet from "/src/components/WhatIsArcjet.astro";
import SdkReferenceLinkByFramework from "/src/components/SdkReferenceLinkByFramework.astro";

import AstroStep1 from "@/snippets/shared/astro/Install.mdx";
import AstroRequirements from "@/snippets/get-started/astro/Requirements.mdx";
import AstroStep2 from "@/snippets/get-started/astro/Step2.mdx";
import AstroStep3 from "@/snippets/get-started/astro/Step3.mdx";
import AstroStep4 from "@/snippets/get-started/astro/Step4.mdx";

import BunStep1 from "@/snippets/get-started/bun/Step1.mdx";
import BunRequirements from "@/snippets/get-started/bun/Requirements.mdx";
import BunStep2 from "@/snippets/get-started/bun/Step2.mdx";
import BunStep3 from "@/snippets/get-started/bun/Step3.mdx";
import BunStep4 from "@/snippets/get-started/bun/Step4.mdx";

import BunHonoStep1 from "@/snippets/get-started/bun-hono/Step1.mdx";
import BunHonoRequirements from "@/snippets/get-started/bun-hono/Requirements.mdx";
import BunHonoStep2 from "@/snippets/get-started/bun-hono/Step2.mdx";
import BunHonoStep3 from "@/snippets/get-started/bun-hono/Step3.mdx";
import BunHonoStep4 from "@/snippets/get-started/bun-hono/Step4.mdx";

import DenoStep1 from "@/snippets/get-started/deno/Step1.mdx";
import DenoRequirements from "@/snippets/get-started/deno/Requirements.mdx";
import DenoStep2 from "@/snippets/get-started/deno/Step2.mdx";
import DenoStep3 from "@/snippets/get-started/deno/Step3.mdx";
import DenoStep4 from "@/snippets/get-started/deno/Step4.mdx";

import FastifyStep1 from "@/snippets/get-started/fastify/Step1.mdx";
import FastifyRequirements from "@/snippets/get-started/fastify/Requirements.mdx";
import FastifyStep2 from "@/snippets/get-started/fastify/Step2.mdx";
import FastifyStep3 from "@/snippets/get-started/fastify/Step3.mdx";
import FastifyStep4 from "@/snippets/get-started/fastify/Step4.mdx";

import NestJsStep1 from "@/snippets/get-started/nest-js/Step1.mdx";
import NestJsRequirements from "@/snippets/get-started/nest-js/Requirements.mdx";
import NestJsStep2 from "@/snippets/get-started/nest-js/Step2.mdx";
import NestJsStep3 from "@/snippets/get-started/nest-js/Step3.mdx";
import NestJsStep4 from "@/snippets/get-started/nest-js/Step4.mdx";

import NextJsStep1 from "@/snippets/get-started/next-js/Step1.mdx";
import NextJsRequirements from "@/snippets/get-started/next-js/Requirements.mdx";
import NextJsStep2 from "@/snippets/get-started/next-js/Step2.mdx";
import NextJsStep3 from "@/snippets/get-started/next-js/Step3.mdx";
import NextJsStep4 from "@/snippets/get-started/next-js/Step4.mdx";

import NodeJsStep1 from "@/snippets/get-started/node-js/Step1.mdx";
import NodeJsRequirements from "@/snippets/get-started/node-js/Requirements.mdx";
import NodeJsStep2 from "@/snippets/get-started/node-js/Step2.mdx";
import NodeJsStep3 from "@/snippets/get-started/node-js/Step3.mdx";
import NodeJsStep4 from "@/snippets/get-started/node-js/Step4.mdx";

import NodeJsExpressStep1 from "@/snippets/get-started/node-js-express/Step1.mdx";
import NodeJsExpressRequirements from "@/snippets/get-started/node-js-express/Requirements.mdx";
import NodeJsExpressStep2 from "@/snippets/get-started/node-js-express/Step2.mdx";
import NodeJsExpressStep3 from "@/snippets/get-started/node-js-express/Step3.mdx";
import NodeJsExpressStep4 from "@/snippets/get-started/node-js-express/Step4.mdx";

import NodeJsHonoStep1 from "@/snippets/get-started/node-js-hono/Step1.mdx";
import NodeJsHonoRequirements from "@/snippets/get-started/node-js-hono/Requirements.mdx";
import NodeJsHonoStep2 from "@/snippets/get-started/node-js-hono/Step2.mdx";
import NodeJsHonoStep3 from "@/snippets/get-started/node-js-hono/Step3.mdx";
import NodeJsHonoStep4 from "@/snippets/get-started/node-js-hono/Step4.mdx";

import NuxtStep1 from "@/snippets/shared/nuxt/Install.mdx";
import NuxtRequirements from "@/snippets/get-started/nuxt/Requirements.mdx";
import NuxtStep2 from "@/snippets/shared/nuxt/Key.mdx";
import NuxtStep3 from "@/snippets/get-started/nuxt/Step3.mdx";
import NuxtStep4 from "@/snippets/get-started/nuxt/Step4.mdx";

import PythonFastapiStep1 from "@/snippets/get-started/python-fastapi/Step1.mdx";
import PythonFastapiRequirements from "@/snippets/get-started/python-fastapi/Requirements.mdx";
import PythonFastapiStep2 from "@/snippets/get-started/python-fastapi/Step2.mdx";
import PythonFastapiStep3 from "@/snippets/get-started/python-fastapi/Step3.mdx";
import PythonFastapiStep4 from "@/snippets/get-started/python-fastapi/Step4.mdx";

import PythonFlaskStep1 from "@/snippets/get-started/python-flask/Step1.mdx";
import PythonFlaskRequirements from "@/snippets/get-started/python-flask/Requirements.mdx";
import PythonFlaskStep2 from "@/snippets/get-started/python-flask/Step2.mdx";
import PythonFlaskStep3 from "@/snippets/get-started/python-flask/Step3.mdx";
import PythonFlaskStep4 from "@/snippets/get-started/python-flask/Step4.mdx";

import ReactRouterStep1 from "@/snippets/get-started/react-router/Step1.mdx";
import ReactRouterRequirements from "@/snippets/get-started/react-router/Requirements.mdx";
import ReactRouterStep2 from "@/snippets/get-started/react-router/Step2.mdx";
import ReactRouterStep3 from "@/snippets/get-started/react-router/Step3.mdx";
import ReactRouterStep4 from "@/snippets/get-started/react-router/Step4.mdx";

import RemixStep1 from "@/snippets/get-started/remix/Step1.mdx";
import RemixRequirements from "@/snippets/get-started/remix/Requirements.mdx";
import RemixStep2 from "@/snippets/get-started/remix/Step2.mdx";
import RemixStep3 from "@/snippets/get-started/remix/Step3.mdx";
import RemixStep4 from "@/snippets/get-started/remix/Step4.mdx";

import SvelteKitStep1 from "@/snippets/get-started/sveltekit/Step1.mdx";
import SvelteKitRequirements from "@/snippets/get-started/sveltekit/Requirements.mdx";
import SvelteKitStep2 from "@/snippets/get-started/sveltekit/Step2.mdx";
import SvelteKitStep3 from "@/snippets/get-started/sveltekit/Step3.mdx";
import SvelteKitStep4 from "@/snippets/get-started/sveltekit/Step4.mdx";

[Arcjet](https://arcjet.com/) is the runtime policy engine for AI features.
Authorize tools, control budgets, and protect against spam and bots. A
developer-first approach to securing AI applications.

This guide will show you how to protect an application with Arcjet by blocking
automated clients that inflate costs and enforcing per-user token budgets.

<FrameworkLinks title="Choose a framework" client:load />

## 1. Install Arcjet

In your project root, run the following:

<SlotByFramework client:load>
  <AstroStep1 slot="astro" />
  <BunStep1 slot="bun" />
  <BunHonoStep1 slot="bun-hono" />
  <DenoStep1 slot="deno" />
  <FastifyStep1 slot="fastify" />
  <NestJsStep1 slot="nest-js" />
  <NextJsStep1 slot="next-js" />
  <NodeJsStep1 slot="node-js" />
  <NodeJsExpressStep1 slot="node-js-express" />
  <NodeJsHonoStep1 slot="node-js-hono" />
  <NuxtStep1 slot="nuxt" />
  <PythonFastapiStep1 slot="python-fastapi" />
  <PythonFlaskStep1 slot="python-flask" />
  <ReactRouterStep1 slot="react-router" />
  <RemixStep1 slot="remix" />
  <SvelteKitStep1 slot="sveltekit" />
</SlotByFramework>

### Requirements

<SlotByFramework client:load>
  <AstroRequirements slot="astro" />
  <BunRequirements slot="bun" />
  <BunHonoRequirements slot="bun-hono" />
  <DenoRequirements slot="deno" />
  <FastifyRequirements slot="fastify" />
  <NestJsRequirements slot="nest-js" />
  <NextJsRequirements slot="next-js" />
  <NodeJsRequirements slot="node-js" />
  <NodeJsExpressRequirements slot="node-js-express" />
  <NodeJsHonoRequirements slot="node-js-hono" />
  <NuxtRequirements slot="nuxt" />
  <PythonFastapiRequirements slot="python-fastapi" />
  <PythonFlaskRequirements slot="python-flask" />
  <ReactRouterRequirements slot="react-router" />
  <RemixRequirements slot="remix" />
  <SvelteKitRequirements slot="sveltekit" />
</SlotByFramework>

## 2. Set your key

[Create a free Arcjet account](https://app.arcjet.com) then follow the
instructions to add a site and get a key.

<SlotByFramework client:load>
  <AstroStep2 slot="astro" />
  <BunStep2 slot="bun" />
  <BunHonoStep2 slot="bun-hono" />
  <DenoStep2 slot="deno" />
  <FastifyStep2 slot="fastify" />
  <NestJsStep2 slot="nest-js" />
  <NextJsStep2 slot="next-js" />
  <NodeJsStep2 slot="node-js" />
  <NodeJsExpressStep2 slot="node-js-express" />
  <NodeJsHonoStep2 slot="node-js-hono" />
  <NuxtStep2 slot="nuxt" />
  <PythonFastapiStep2 slot="python-fastapi" />
  <PythonFlaskStep2 slot="python-flask" />
  <ReactRouterStep2 slot="react-router" />
  <RemixStep2 slot="remix" />
  <SvelteKitStep2 slot="sveltekit" />
</SlotByFramework>

## 3. Configure

This configures Arcjet to protect your AI application: block automated clients that
inflate costs, and enforce per-user token budgets.

<SlotByFramework client:load>
  <AstroStep3 slot="astro" />
  <BunStep3 slot="bun" />
  <BunHonoStep3 slot="bun-hono" />
  <DenoStep3 slot="deno" />
  <FastifyStep3 slot="fastify" />
  <NestJsStep3 slot="nest-js" />
  <NextJsStep3 slot="next-js" />
  <NodeJsStep3 slot="node-js" />
  <NodeJsExpressStep3 slot="node-js-express" />
  <NodeJsHonoStep3 slot="node-js-hono" />
  <NuxtStep3 slot="nuxt" />
  <PythonFastapiStep3 slot="python-fastapi" />
  <PythonFlaskStep3 slot="python-flask" />
  <ReactRouterStep3 slot="react-router" />
  <RemixStep3 slot="remix" />
  <SvelteKitStep3 slot="sveltekit" />
</SlotByFramework>

<SlotByFramework client:load>
  <AstroStep4 slot="astro" />
  <BunStep4 slot="bun" />
  <BunHonoStep4 slot="bun-hono" />
  <DenoStep4 slot="deno" />
  <FastifyStep4 slot="fastify" />
  <NestJsStep4 slot="nest-js" />
  <NextJsStep4 slot="next-js" />
  <NodeJsStep4 slot="node-js" />
  <NodeJsExpressStep4 slot="node-js-express" />
  <NodeJsHonoStep4 slot="node-js-hono" />
  <NuxtStep4 slot="nuxt" />
  <PythonFastapiStep4 slot="python-fastapi" />
  <PythonFlaskStep4 slot="python-flask" />
  <ReactRouterStep4 slot="react-router" />
  <RemixStep4 slot="remix" />
  <SvelteKitStep4 slot="sveltekit" />
</SlotByFramework>

The requests will also show in the [Arcjet dashboard](https://app.arcjet.com).

## FAQs

<FAQs />

## What next?

<CardGrid>
  <Link.Card
    title="AI runtime protection"
    href="/ai-protection"
    description="The runtime policy engine for AI features."
  />
  <Link.Card
    title="Customize allowed bots"
    href="/bot-protection/identifying-bots"
    description="Identify bots and configure allow/deny lists."
  />
  <Link.Card
    title="Testing"
    href="/testing"
    description="Write tests for your rules."
  />
</CardGrid>

## Get help

Need help with anything? [Email us](mailto:support@arcjet.com) or [join our
Discord](https://arcjet.com/discord) to get support from our engineering team.