Crytify — Integration Examples

Crytify is a bot detection API. Send it a visitor's IP and headers (and optionally a browser fingerprint), get back ALLOW / CHALLENGE / BLOCK before you render a single byte of your page.

This repo has copy-pasteable integration examples for PHP and Node.js. It is not the API source or the detection engine — just the client-side glue code to call it from your own app.

• Sign up (free): https://crytify.com/register — 1,000 API calls/day, no card required
• Full docs: https://crytify.com/docs
• Dashboard: https://dashboard.crytify.com

Quickstart — one-file gate (fastest way to try it)

No install, no dependencies. Download the file straight from Crytify (always the current version — nothing in this repo goes stale) and add two lines to the top of any page you want protected:

PHP

curl -o crytify.php https://crytify.com/download/crytify.php

require_once __DIR__ . '/crytify.php';
crytify_gate('cry_live_xxxxxxxxxxxx');

Python (Flask / Django / FastAPI)

curl -o crytify.py https://crytify.com/download/crytify.py

from crytify import crytify_gate

@app.route('/login')
@crytify_gate('cry_live_xxxxxxxxxxxx')
def login():
    ...

Node.js (Express / any http framework)

curl -o crytify.js https://crytify.com/download/crytify.js

const { crytifyGate } = require('./crytify');
app.use('/login', crytifyGate('cry_live_xxxxxxxxxxxx'));

Get your API key at crytify.com/register — a default key is created automatically when you sign up.

Framework-style client + examples (this repo)

If you'd rather call the API yourself (custom middleware, a non-PHP/Node framework, more control over the request), use php/CrytifyClient.php directly:

require 'CrytifyClient.php';

$crytify = new CrytifyClient('cry_live_xxxxxxxxxxxx');
$result  = $crytify->trust($_SERVER['REMOTE_ADDR'], getallheaders());

if ($result->isBlock()) {
    http_response_code(403);
    exit('Access denied.');
}

if ($result->isChallenge()) {
    header('Location: ' . $result->challengeUrl());
    exit;
}

// Visitor passed — render your page normally

More complete examples in this repo:

File	What it shows
php/examples/server-side-gate.php	Plain PHP page-top gate
php/examples/page-protection.php	Backend endpoint for the client-side fingerprint check
php/examples/CrytifyGateFilter.php	CodeIgniter 4 filter
node/examples/express.js	Express middleware, per-route
node/examples/nextjs-middleware.mjs	Next.js Edge Middleware

Client-side (JS-only bots / browser automation)

For visitors that do run JavaScript but are driven by automation tooling (headless browsers, bot frameworks), add the fingerprint collector — it's served pre-built, no build step on your end:

<script src="https://crytify.com/assets/crytify-fingerprint.js"></script>

See crytify.com/docs for the full client-side setup guide.

How it decides

Crytify combines network intelligence (hosting/proxy/VPN/Tor detection, ASN reputation), device/browser fingerprint consistency checks, and its own self-learning threat database (every block/challenge across all Crytify customers improves detection for everyone) to return a decision in ~150ms. See crytify.com/docs for the full request/response shape and all available options.

License

The example code in this repo is MIT-licensed — use it however you like. The Crytify API itself is a commercial service; see crytify.com for pricing.