Visitor check

Documentation & Help

A free and user privacy respecting alternative to Googles reCAPTCHA. With Visitor Check by NodeHost we do NOT track visitors across services, or use tracking and personal info against humans. This tool is completely free, customizable with simple CSS and fast.

Place this code in your form before submit (or anywhere in the form) to start using.

<div id='nhvc_wjfo9i32'></div><script>document.addEventListener("DOMContentLoaded", function(){ var datecode=new Date().getTime(); var script=document.createElement('script'); script.src="//" + datecode + ""; document.getElementById("nhvc_wjfo9i32").appendChild(script); });</script>

How to validate

We add a input element to your form with the name nhvc_key that contains the key you use against our API to get a visitor score on submit.

To get the users score when processing the form just fetch the source of the url but replace KEYHERE with the key posted in nhvc_key.

The returned score

When you send in the key we will return a number, the number is a score for the visitor trust, anything above 50 means they clicked the correct item, but we do many checks so you should look for a score over 70 but this is up to you.

Get score in PHP

Here is a simple example where the value in $response is the visitor score.

$options = array('http' => array('user_agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0 Safari/605.1.15'));
$context = stream_context_create($options);
$response = file_get_contents(''.$key.'', false, $cont