EgoArena Captcha
Add the script, tag your form, and EgoArena verifies the token before your submission is accepted.
HTML
<script src="https://egoarena.com/captcha.js" async defer></script>
<form
data-ego-captcha-protect
data-ego-captcha-sitekey="your-public-site-key"
data-ego-captcha-action="signup"
data-ego-captcha-relay="https://egoarena.com/api/captcha/protected-submit"
>
<!-- your normal fields -->
<button type="submit">Send</button>
</form>