mtCaptcha MODX Extra
Install the extra via MODX package manager
Signup for a free account on https://www.mtcaptcha.com/ and create a private and site key.
Add private and site key to your system settings
[[!FormIt?
&hooks=`mtCaptcha`
&validate=`name:required`
]]
<form action="[[~[[*id]]]]" method="post">
<div>
<label>Name: </label>
<input type="text" name="name" value="[[!+fi.name]]">
<span class="error">[[!+fi.error.name]]</span>
</div>
[[!mtCaptchaRenderer]]
<button type="submit">send</button>
</form>
[[!mtCaptchaRenderer?
&tpl=`yourCustomChunk`
]]
You can set the different settings inside your custom mtCaptcha chunk in the script section: https://www.mtcaptcha.com/dev-guide-quickstart You also find a generator for this settings here: https://service.mtcaptcha.com/mtcv1/demo/index.html