> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://docs.clientexec.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Using Captcha

A Captcha is a type of challenge-response system designed to differentiate humans from robotic computer programs.

To use Captcha in Clientexec first you need to set up your keys. To do this go to Settings > Plugins > **Captcha**.

### You then have three options:

* **CloudFlare Turnstile**:  you can sign up and get your Site Key and Secret key [here](https://www.cloudflare.com/products/turnstile/). (will be added in Clientexec 6.7.0)
* **hCaptcha**: you can sign up and get your Site Key and Secret key [here](https://www.hcaptcha.com/).
* **ReCaptcha**: you can get your Site Key and Secret key [here](https://www.google.com/recaptcha/admin/create). (Note: use reCAPTCHA v2).

Once you have have entered your keys and saved your settings, go to **Settings > Security > Captcha**.

From here you can enable Captcha and select which sections of Clientexec you want it to appear on.

![](https://storage.crisp.chat/users/helpdesk/website/-/8/9/5/a/895a2775afb3f800/screenshot-2026-08-26-at-12-20_1jg9ky0.png)