In addition, CAPTCHA can make the registration process significantly less accessible, particularly for individuals with visual impairments, such as those who are blind or have low vision.
Currently, hCaptcha is the only available provider supported by Mastodon.
Other providers may be added in the future.
## hCaptcha
- Create a free hCaptcha account at [hcaptcha.com](https://www.hcaptcha.com)
- After completing registration, generate a Site Key and Site Secret from the hCaptcha dashboard
- Add the values to your Mastodon environment configuration as `HCAPTCHA_SITE_KEY` and `HCAPTCHA_SECRET_KEY`
- Restart the Mastodon services running on your server
- From the Mastodon web interface navigate to **Administration** > **Server settings** > **Registrations** and check the box labled "Require new users to solve a CAPTCHA to confirm their account"