@arcjet/node
Advanced tools
@arcjet/node
Arcjet helps developers protect their apps in just a few lines of code. Implement rate limiting, bot protection, email verification, and defense against common attacks.
This is the Arcjet SDK for Node.js.
Looking for our Next.js framework SDK? Check out the
@arcjet/next package.
Visit the quick start guide to get started.
Try an Arcjet protected app live at https://example.arcjet.com (source code).
npm install -S @arcjet/node
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.
import arcjet, { tokenBucket } from "@arcjet/node";
import http from "node:http";
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
}),
],
});
const server = http.createServer(async function (
req: http.IncomingMessage,
res: http.ServerResponse,
) {
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()) {
res.writeHead(429, { "Content-Type": "application/json" });
res.end(
JSON.stringify({ error: "Too Many Requests", reason: decision.reason }),
);
} else {
res.writeHead(200, { "Content-Type": "application/json" });
res.end(JSON.stringify({ message: "Hello world" }));
}
});
server.listen(8000);
Arcjet Shield protects your application against common attacks, including the OWASP Top 10. You can run Shield on every request with negligible performance impact.
import arcjet, { shield } from "@arcjet/node";
import http from "node:http";
const aj = arcjet({
key: process.env.ARCJET_KEY!, // Get your site key from https://app.arcjet.com
rules: [
shield({
mode: "LIVE", // will block requests. Use "DRY_RUN" to log only
}),
],
});
const server = http.createServer(async function (
req: http.IncomingMessage,
res: http.ServerResponse,
) {
const decision = await aj.protect(req);
if (decision.isDenied()) {
res.writeHead(403, { "Content-Type": "application/json" });
res.end(JSON.stringify({ error: "Forbidden" }));
} else {
res.writeHead(200, { "Content-Type": "application/json" });
res.end(JSON.stringify({ message: "Hello world" }));
}
});
server.listen(8000);
Licensed under the Apache License, Version 2.0.
1.0.0-alpha.19 (2024-07-15)
FAQs
Arcjet SDK for Node.js
The npm package @arcjet/node receives a total of 123 weekly downloads. As such, @arcjet/node popularity was classified as not popular.
We found that @arcjet/node demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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