Libraries tagged by proof of work

TYPO3 form element for spam protection by utilizing the proof-of-work mechanism Altcha.

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PHP port of the Cap proof-of-work captcha server. Wire-compatible with @cap.js/widget.

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Local Proof-of-Work CAPTCHA for Flarum – protect login, registration and password reset without any external service

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Laravel wrapper for Cap (tiagozip/cap) — self-hosted CAPTCHA alternative

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Invisible CAPTCHA alternative: honeypot, single-use timed tokens, proof of work, rate limiting, IP reputation and gibberish detection.

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ALTCHA proof-of-work spam protection for Laravel — drop-in middleware, validation rule, and challenge endpoint.

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Altcha Captcha for Powermail - Accessible and GDPR compliant proof-of-work (pow) captcha for powermail, no external service required

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Hashcash implementation in PHP.

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Cap CAPTCHA (trycap.dev) for Symfony forms: a self-hosted, proof-of-work reCAPTCHA alternative with a form type, a validator constraint and a Turbo-ready widget

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Statamic addon for Cap CAPTCHA (proof-of-work) integration

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Symfony FormType for ALTCHA — privacy-friendly, self-hosted proof-of-work CAPTCHA alternative for forms (GDPR-friendly, no cookies).

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A captcha decided between the browser and your own application: proof of work, timing and a honeypot, with no third-party service.

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Official Laravel SDK for captchaapi.eu — EU-hosted, GDPR-compliant proof-of-work CAPTCHA with native Livewire support.

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TYPO3 extension providing CAPTCHA (trycap.dev) bot protection via a PSR-15 middleware and invisible proof-of-work challenge

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A CodeIgniter4 library for ALTCHA, a GDPR, WCAG 2.2 AA, and EAA compliant, self-hosted CAPTCHA alternative with PoW mechanism.

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