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1-Click installation template for mCaptcha on Easypanel


mCaptcha is a proof-of-work based captcha system that prioritizes user privacy and offers a fully automated experience. Unlike traditional captcha systems, mCaptcha does not track or profile users, ensuring a privacy-focused user experience. It is designed to be robust and accurate, not relying on IP addresses for rate-limiting, making it suitable for users behind NATs. The user experience is silent and seamless, eliminating the need for annoying image-based captchas. mCaptcha uses a proof-of-work solution to fiercely defend your site, making it more expensive for attackers to target your site than for you to respond to their requests. It is a libre software, with client libraries licensed under proprietary-friendly free software licenses. mCaptcha is also compatible with reCAPTCHA and hCaptcha, making it a convenient drop-in replacement. The core functionality of mCaptcha is to use a SHA256 based proof-of-work system to rate limit users, providing a token upon successful validation that users can then submit with their request or form submission to the target website.


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  • Privacy Focused: mCaptcha is a proof-of-work based captcha system that prioritizes your privacy. It doesn't track or profile your users, ensuring a secure and private user experience.
  • Robust and Accurate: Whether your users are behind NATs or not, mCaptcha provides a seamless experience. It doesn't use IP addresses for rate-limiting, making it a reliable and accurate system.
  • Best-in-class User Experience: mCaptcha is designed to be unobtrusive. Your users won't even notice it's there. No more annoying images or unnecessary tasks.
  • Defend Like Castles: mCaptcha's proof-of-work based solution defends your site fiercely, making attacking your site more expensive than what it will take for you to respond to the attacker's requests.
  • Libre Software: mCaptcha is a free software. It's client libraries are licensed using proprietary-friendly free software licenses but the core is AGPL'd.


  • Proof-of-Work Based: mCaptcha uses SHA256 based proof-of-work (PoW) to rate limit users. This makes interacting with websites (computationally) expensive for the user, deterring malicious attacks.
  • Automated Process: The entire process is automated from the user's point of view. All they have to do is click on a button to initiate the process.
  • Resistant to Replay Attacks: mCaptcha's proof-of-work configurations have short lifetimes and can be used only once. This makes it resistant to replay attacks.
  • Seamless User Experience: mCaptcha's user experience is super silent. Solving CAPTCHAs has never been easier. One click and your users are on their way.
  • Compatible with reCAPTCHA and hCaptcha: Already using a captcha solution? No worries, mCaptcha's APIs are compatible with reCAPTCHA and hCaptcha!


NameDescriptionRequiredDefault Value
App Service Name-yesmcaptcha
App Service Image-yesmcaptcha/mcaptcha:latest
Database Service Name-yesmcaptcha-db
Redis Service Name-yesmcaptcha-redis


mCaptcha Screenshot mCaptcha Screenshot mCaptcha Screenshot

Change Log

  • 2023-5-18 – first release


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