Libraries tagged by proof of work

Application-agnostic anti-bot protection for Laravel: risk-based scoring, sliding-window rate limiting, proof-of-work challenges, temporary blocking, and network-verified search engine crawler bypass (Googlebot, Bingbot, YandexBot).

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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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Advanced anti-bot library for Node.js and PHP using multi-layer fingerprinting, behavioral analysis, and adaptive Proof-of-Work (PoW) challenges.

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PHP client for aamio, the ephemeral rendezvous for agents: threads with a secret read key and a public write address that expire on time, receipts, presence, gate and proof of work, and the open board. No account, no API key.

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JSON Work Proof (JWP) - proof-of-work algorithm

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Self-hosted, privacy-friendly ALTCHA (proof-of-work CAPTCHA) integration for Mautic forms.

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Server-side verification for InfoPeak Captcha - the privacy-first, EU-hosted captcha. No tracking, no cookies, no puzzles.

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Official Crovly PHP SDK — verify captcha tokens

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Self-hosted, zero-dependency, cross-language modern captcha with a Laravel integration.

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PHP version of Lockbot Captcha

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Altcha (self-hosted, proof-of-work) provider for the O3-Shop core CAPTCHA layer

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Proof of Work Captcha Field for Silverstripe CMS 5

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Stateless proof of work challenge generation, solving, and verification using HMAC, SHA256 and simple nonce iteration.

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Altcha proof-of-work spam protection for CakePHP 5

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